1

Ajaya Kumar Nayak

Biographical notes

Dr Ajaya Kumar Nayak, is currently an Associate Professor, Civil Engineering Department, Veer

Surendra Sai University of Technology, Burla since May 2015 after working as an Assistant Professor

Civil Engineering Department, Veer Surendra Sai University of Technology, Burla for about six months.

He was a Reader in Civil Engineering Department, VSSUT, Burla for about three years and two months

after working as an Associate Professor, Civil Engineering Department, KIIT University, Bhubaneswar

for about two months. He was a Lead Engineer, Material Mechanics Laboratory, Material System

Technologies, General Electric Global Research, Bangalore, India for two and half years after working as

a Research Associate in Center for Composite Materials, University of Delaware, USA for Six Months.

Previously He worked as a Research Fellow, Ship Science, School of Engineering Sciences, University of

Southampton, UK for five and half years. He received a Bachelor of Engineering Degree with Honors in

Civil Engineering from the National Institute of Technology, Rourkela, India, 1994, Master of Civil

Engineering Degree with a specialization in Structures from the Indian Institute of Science, Bangalore,

India, 1999 and a PhD in Composite Materials and Structures from the School of Civil Engineering and

the Environment and Ship Science, School of Engineering Sciences, University of Southampton, UK in

2002. He has about two years civil engineering industry experience in India prior to joining Master of

Engineering degree program. He has more than 55 publications including 10 peer reviewed journal

papers, 5 working journal papers and two book chapters. He has guided five Master of Technology

Degree students in Structural Engineering Specialisation in VSSUT, Burla. Currently two students are

pursuing for PhD degrees under his guidance. He was an Examiner for a PhD degree student from IISc,

Bangalore and for Master Degree students in PG Department of Environmental Sciences, Sambalpur

University. He has about three years Teaching experience during the time at General Electric Global

Research, Bangalore, India and University of Southampton, UK. His current research interests are in the

Mechanics, Composites, Structural health monitoring, Processing, Reliability and safety, Fracture and

fatigue, Design. His teaching interests are in the Finite element analysis and Optimization, Failure of

materials, Structural Integrity, Marine safety and environmental engineering, Mechanics, Structures and

materials, Theory of plate structures and Structural analysis. He is also involved in design,

conceptualization, reverse engineering and project management. His background combines excellent

communication, problem solving, functional/technical, intellectual, action oriented, quick technical

learning, time management and peer relationship skills.

Contact Address

3R/29, Professors’ Colony

VSSUT, Burla, 768018, Sambalpur, Odisha

Ph No: +91(0) 9777460423

E-mail: ajayanayak07@gmail.com

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Education

PhD, School of Civil Engineering and the Environment and Ship Science, School of Engineering

Sciences, University of Southampton, UK., 1999-2002

Master of Engineering, Civil Engineering (Structures), Indian Institute of Science Bangalore, India,

CGPA 6.8/8, 1997 – 1999

Bachelor of Engineering, Civil Engineering (Honors), National Institute of Technology Rourkela,

India, 81.5 %, 1990 – 1994

Research Interests

1. Mechanics

2. Composites

3. Structural Health Monitoring

4. Processing

5. Reliability and Safety

6. Fracture and Fatigue

7. Design

Teaching Interests

1. Finite element analysis and Optimization

2. Failure of materials

3. Structural Integrity

4. Marine safety and environmental engineering

5. Mechanics

6. Structures and materials

7. Theory of plate structures

8. Structural analysis

9. Advanced Reinforced Concrete Design

10. Advanced Design of Steel Structures

11. Theory of Elasticity and Plasticity

12. Earthquake Analysis and Design

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Experience

May 15 – Till Date: Associate Professor, Civil Engineering Department, VSSUT, Burla, India.

November 2014- April 2015: Assistant Professor, Civil Engineering Department, VSSUT, Burla,

India.

September 2011-October 2014: Reader, Civil Engineering Department, VSSUT, Burla, India.

July 2011-August 2011: Associate Professor, Civil Engineering Department, KIIT University,

Bhubaneswar, India.

December 2010-April 2011: Research Interaction, Ship Science, School of Engineering Sciences,

University of Southampton, UK.

May 2008-November 2010: Lead Engineer, Material Mechanics Laboratory, Material System

Technologies, General Electric Global Research, Bangalore, India.

March 2008-April 2008: Research Interaction, Civil Engineering (Structures), Indian Institute of

Science, Bangalore, India.

September 2007-February 2008: Research Associate, Center for Composite Materials,

University of Delaware, USA.

April 2002-August 2007: Research Fellow, Ship Science, School of Engineering Sciences,

University of Southampton, UK.

April 1999-March 2002: Research Assistant, School of Civil Engineering and the Environment,

University of Southampton, UK.

August 1997-January 1999: Research Assistant, Civil Engineering (Structures), Indian Institute

of Science, Bangalore, India.

August 1994-October 1995: Construction Engineer, M/s Unitech Limited, New Delhi, India.

August 1994-May 1995: Management Trainee, M/s Unitech Limited, New Delhi, India.

Teaching Experience

: Structural Mechanics, School of Civil Engineering and the Environment, University of

Southampton, UK.

: Structural Integrity, Ship Science, School of Engineering Sciences, University of

Southampton, UK.

: Marine Safety and Environmental Engineering, Ship Science, School of Engineering

Sciences, University of Southampton, UK.

: Mechanical Behavior of Materials, General Electric Global Research, Bangalore, India.

: Finite Element Analysis and Optimisation, General Electric Global Research, Bangalore,

India.

: Structural Dynamics and Earthquake Engineering, UG Course, Civil Engineering Department,

VSSUT, Burla.

: Structural Analysis-II, UG Course, Civil Engineering Department, VSSUT, Burla.

:Structural Design, UG Course, Civil Engineering Department, VSSUT, Burla.

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: Steel Structures, UG Course, Civil Engineering Department, VSSUT, Burla.

: Advanced Structural Design, UG Course, Civil Engineering Department, VSSUT, Burla.

: Concrete Structures II, UG Course, Civil Engineering Department, VSSUT, Burla.

:Theory of Elasticity and Plasticity, UG Course, Civil Engineering Department, VSSUT, Burla.

:Civil Engineering Materials for Construction, UG Course, Civil Engineering Department,

VSSUT, Burla.

:Advanced Reinforced Concrete Design, PG Course (Structures), Civil Engineering

Department, VSSUT, Burla.

:Advanced Design of Steel Structures, , PG Course (Structures), Civil Engineering Department,

VSSUT, Burla.

: Theory of Elasticity and Plasticity, PG Course (Structures & Geotechnical Engineering), Civil

Engineering Department, VSSUT, Burla.

: Earthquake Analysis and Design, PG Course (Structures & Geotechnical Engineering), Civil

Engineering Department, VSSUT, Burla.

: Structural Analysis, BArch Course, Architecture Department, VSSUT, Burla

: Engineering Mechanics, BArch Course, Architecture Department, VSSUT, Burla

:Building Construction-I, BArch Course, Architecture Department, VSSUT, Burla

: Building Materials-II, BArch Course, Architecture Department, VSSUT, Burla

Publications

Journal Papers

1. A.K. Nayak and A.K. Satapathy, “Stochastic damped free vibration analysis of composite sandwich

plates”, Procedia Engineering, Vol 144, 2016, pp. 1315-1324.

2. J. Munda, P.K. Pradhan and A.K. Nayak, “ A Review on the performance of Modified Cam-Clay

Model for fine grained Soil”, Journal of Civil Engineering and Environmental Technology, Vol

1, 2014, pp.62-67.

3. A.K. Nayak, R.A. Shenoi and J.I.R. Blake, “ A Study of Transient Response of Initially Stressed

Composite Sandwich Folded Plates”, Composites Part B: Engineering, Vol 44, 2013, pp.67-75.

4. A.K. Nayak, R.A. Shenoi and S.S.J. Moy, “Dynamic response of Composite Sandwich Plates

Under In-Plane Stresses”, Composites Part-A: Applied Science and Manufacturing, Vol. 37,

2006, pp.1189-1205.

5. A.K. Nayak, R.A. Shenoi and S.S.J. Moy, “Transient Response of Initially Stressed Composite

Sandwich Plates”, Finite Elements in Analysis and Design, Vol. 42, 2006, pp.821-836.

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6. A.K. Nayak, S.S.J. Moy and R.A. Shenoi, “A Higher Order Finite Element Theory For Buckling

and Vibration Analysis of Initially Stressed Composite Sandwich Plates”, Journal of Sound and

Vibration, Vol. 286, 2005, pp.763-780.

7. A.K. Nayak and R.A. Shenoi, “Assumed Strain Finite Elements For Buckling and Vibration

Analysis of Initially Stressed Damped Composite Sandwich Plates”, Journal of Sandwich

Structures and Materials, Vol. 7, 2005, pp.307-334.

8. A.K. Nayak, R.A. Shenoi and S.S.J. Moy, “Transient Response of Composite Sandwich Plates”,

Composite Structures, Vol. 64, 2004, pp.249-267.

9. A.K. Nayak, S.S.J. Moy and R.A. Shenoi, “Quadrilateral Finite Elements for Multi-layer

Sandwich Plates”, Journal of Strain Analysis for Engineering Design, Vol. 38, 2003, pp.377-

394.

10. A.K. Nayak, S.S.J. Moy and R.A. Shenoi, “Free Vibration Analysis of Composite Sandwich

Plates Based on Reddy's Higher-Order Theory”, Composites Part B: Engineering, Vol. 33, 2002,

pp. 505-519.

11. A.K. Nayak, R.A. Shenoi and S.S.J. Moy, “Analysis of Damped Composite Sandwich Plates

Using Plate Bending Elements with Substitute Shear Strain Fields Based on Reddy's Higher-

Order Theory”, Proceedings of The Institute of Mechanical Engineers, Journal of Mechanical

Engineering Sciences, Vol. 216, 2002, pp.591-606.

Working Journal Papers

12. A.K. Nayak, R.A. Shenoi, J.I.R. Blake and O. Prakash, “Thermal Stresses in Laminated

Composite Plates”, to be submitted to Journal of Thermal Stresses.

13. A.K. Nayak, R.A. Shenoi, J.I.R. Blake, J.W. Gillespie Jr., D. Heider and E. Madenci, “Thermo-

transient Response of Composite Sandwich Shells”, to be submitted to Composite Structures.

14. A.K. Nayak, R.A. Shenoi and J.I.R. Blake, “Damping Response of Composite Sandwich Folded

Plates”, to be submitted to Journal of Composite Materials.

15. A.K. Nayak, R.A. Shenoi and J.I.R. Blake, “Transient Response of Laminated Composite Plates

With CutOuts”, to be submitted to Journal of Sound and Vibration.

16. A.K. Nayak, R.A. Shenoi, J.I.R. Blake, R. Gupta, S. Subramanian, J. Zhu, X. Fang, R. Mills, W.

Lin and S. Finn, “A Study of Stresses in Thermoplastic Composite Sandwich Plates”, to be

submitted to Journal of Thermoplastic Composite Materials.

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Conference Papers-Refereed

17. A.K. Nayak, S.S.J. Moy and R.A. Shenoi, “Damping Prediction of Sandwich Plates Using The

Finite Element Method”, 2nd

International Conference on Theoretical, Applied, Computational

and Experimental Mechanics, (ICTACEM 2001), IIT Kharagpur, India, December 2001, Paper

No: 104, pp.1-12.

18. A.K. Nayak, R.A. Shenoi and S.S.J. Moy, “Damping Prediction of Composite Sandwich Plates

Using Assumed Strain Plate Bending Elements Based on Reddy's Higher-Order Theory”, 43rd

AIAA/ASME/ASCE/AHS Structures, Structural Dynamics and Materials Conference, Denver,

USA, April 2002, Paper No: 1243, pp.1-11.

19. A.K. Nayak, R.A. Shenoi, S.S.J. Moy and J.R. Blake, “Transient Analysis of Composite

Sandwich Plates Using Assumed Strain Plate Bending Elements Based on Reddy's Higher-Order

Theory”', Proceedings of 1st International Conference on Advanced Polymer Composites for

Structural Applications in Construction (ACIC 2002), University of Southampton, UK, April

2002, pp. 347-357.

20. A.K. Nayak, S.S.J. Moy and R.A. Shenoi, “A Study of the Effect of Initial In-Plane Stresses on

Vibration and Buckling Behaviour of Damped Composite Sandwich Plates”, Sixth International

Conference on Sandwich Structures, Ft. Lauderdale, Florida, USA, March 31-April 02, 2003, pp.

1006-1015.

21. A.K. Nayak, S.S.J. Moy and R.A. Shenoi, “Buckling and Vibration Analysis of Initially Stressed

Composite Sandwich Plates”, Eighth International Conference on Recent Advances in Structural

Dynamics, University of Southampton, UK, July 2003, paper No:21, pp. 1-12.

22. A.K. Nayak, S.S.J. Moy and R.A. Shenoi, “Dynamic Response of Initially Stressed Composite

Sandwich Plates”, Proceedings of 2nd

International Conference on Advanced Polymer

Composites for Structural Applications in Construction (ACIC 2004), University of Surrey, UK,

22-24April 2004, pp. 1-10.

23. A.K. Nayak and R.A. Shenoi, “Assumed Strain Higher Order Shell Elements For Damped

Composite Sandwich Shells”, First International Congress on Computational Mechanics and

Simulation (ICCM04), IIT Kanpur, December 2004, pp.158-165.

24. A.K. Nayak and R.A. Shenoi, “A Higher Order Assumed Strain Finite Element For Transient

Analysis of Initially Stressed Composite Sandwich Plates”, 3rd

International Conference on

Theoretical, Applied, Computational and Experimental Mechanics, (ICTACEM 2004), IIT

Kharagpur, India, December 2004, pp.1-14.

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25. A.K. Nayak and R.A. Shenoi, “Free Vibration Analysis of Composite Sandwich Shells Using

Higher Order Shell Elements”, AIAA-2005-1837 46th AIAA/ASME/ASCE/AHS Structures,

Structural Dynamics and Materials Conference, Texas, USA, April 2005.

26. A.K. Nayak, R.A.Shenoi and J.I.R Blake, “Transient analysis of initially stressed folded

composite sandwich plate structures using a vortex shell element”, 3rd

International Conference

on Advanced Composites In Construction ACIC2007, University of Bath, UK.

27. A.K. Nayak, “Damping Analysis of Composite Folded Plate Structures Using a Vortex Shell

Element”, AIAA-2007- 48th AIAA/ASME/ASCE/AHS Structures, Structural Dynamics and

Materials Conference, Texas, USA, April 2007.

28. A.K. Nayak, “Elasto-Plastic Analysis of Initially-Stressed Plates Using a 3D Degenerated

Mindlin-Kirchhoff Shell Element”, AIAA-2007- 48th AIAA/ASME/ASCE/AHS Structures,

Structural Dynamics and Materials Conference, Texas, USA, April 2007.

29. K. Chandraseker, D. Patro, A.K. Nayak, S.C. Quek and C.S. Yerramalli, “Scaling Studies in

Modeling For Compressive Strength of Thick Composite Structures”, ASME Mechanical

Engineering Conference, Vancouver, Canada, November 2010.

30. S. Singh and A.K. Nayak, “Stochastic Analysis of A Single Lap Joint Including Material and

Geometric Nonlinearity”, National Conference on Recent Advances in Mechanics and Materials-

(RAMM2012), VSSUT, Burla, Sambalpur, Odisha, February 2012.

31. A.K. Nayak, “A transient permeability model for the process modelling in multi-wall carbon

nano-tubes/polyster flow through glass fiber”, National Conference on Recent Advances in

Science for Technology-(RAST2012), VSSUT, Burla, Sambalpur, Odisha, February 2012.

32. A,K, Nayak, R.A.Shenoi, J.I.R. Blake and O. Prakash, “Thermal stress analysis in laminated

composite plates”, International Conference on Strength of Materials (ICSMA16), Indian Institute

of Science, Bangalore, August 2012.

33. A,K, Nayak, R.A.Shenoi, J.I.R. Blake, J.W. Gillespie Jr, D. Heider and E. Madenci, “Thermo-

transient response of composite sandwich shells”, International Conference on Strength of

Materials (ICSMA16), Indian Institute of Science, Bangalore, August 2012.

34. A.K. Nayak, R.A. Shenoi and J.I.R. Blake, “A computer aided FEM Based numerical solution for

transient response of laminated composite plates with cutouts”, International Conference on

Structural Engineering and Mechanics, National Institute of Technology, Rourkela, December

2013.

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35. A.K. Nayak, R.A. Shenoi, J.I.R. Blake, R. Gupta, S. Subramanian, J. Zhu, X. Fang, R. Mills, W.

Lin and S. Finn, “Stress Analysis of Thermoplastic Composite Sandwich Plates”, International

Conference on Emerging Materials and Processes, CSIR-IMMT, Bhubaneswar, Odisha, 26th -

28th February 2014.

36. A.K. Satapathy and A.K. Nayak, “Stochastic Free Vibration of Composite Sandwich Plates”,

National Conference on Innovations in Design & Construction of Industrial Structures, National

Institute of Technology, Durgapur, April 2014.

37. A.K. Nayak and A.K. Satapathy, “Stochastic Free Vibration Analysis of Variable Thickness

Plates, Prismatic Folded Plates and Curved Shells Using Finite Strip Method”, International

Conference on Advanced Materials Development and Performance, AMDP2017, July 2017

(Accepted for Publication). Savitribai Phule Pune University (Formerly known as University of

Pune).

38. S. Sahu and A.K. Nayak, “Free Vibration Analysis of Anti-Symmetric Composite Sandwich

Plates”, International Conference on Advanced Materials Development and Performance,

AMDP2017, July 2017 (Accepted for Publication). Savitribai Phule Pune University (Formerly

known as University of Pune).

39. A.K. Satapathy and A.K. Nayak, “Stochastic Buckling Analysis of Composite Sandwich Plates”,

13th International Conference on Vibration Problems, ICOVP2017, IIT Guwahati, December

2017 ((Accepted for Publication).

40. A.K. Satapathy and A.K. Nayak, “Stochastic free vibration of thick square plates made of

isotropic, orthotropic, trigonal, monoclinic, hexagonal and triclinic materials”, 13th International

Conference on Vibration Problems, ICOVP2017, IIT Guwahati, December 2017 ((Accepted for

Publication).

41. R. Panigrahi and A.K. Nayak, “A Comparison of the Linear, Quadratic and Cubic Finite Strip

Elements for the Vibration Analysis of Composite Sandwich Plates”, 13th International

Conference on Vibration Problems, ICOVP2017, IIT Guwahati, December 2017 ((Accepted for

Publication).

Working Conference Papers

42. A.K. Satapathy and A.K. Nayak, “Free Vibration of Symmetric Composite Sandwich Plates

Using a Fifteen Node Shear Deformable Triangular Plate Bending Element”, To be submitted to

International Conference on Composite Materials and Structures, ICCMS2017, December 2017,

IIT Hyderabad.

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43. S. Sahu, R. Panigrahi and A.K. Nayak, “Free Vibration of Initially Stressed Antisymmetric

Composite Sandwich Plates”, To be submitted to International Conference on Composite

Materials and Structures, ICCMS2017, December 2017, IIT Hyderabad.

Workshop Papers-Refereed

44. A.K. Nayak, “A state of art review of super-hydrophobic surfaces”, Workshop on New and Nano-

materials (WNNM-2012), Department of Science and Technology and Odisha Bigyan Academy,

Govt. Of Odisha, Bhubaneswar, January 2012.

Book Chapters

45. A.K. Nayak and R.A. Shenoi, “The Finite Element Analysis of Sandwich Plates and Shells”, in

the Theory and Applications of Sandwich Structures, University of Southampton, Editors: R.A.

Shenoi, A. Groves and Y.D.S. Rajapakse, 2005, pp. 267-286.

46. A.K. Nayak, “Finite Element Modelling for Composite Wind Turbine Blades”, in Recent

Advances in Composite Materials for Wind Turbine Blades, Dr Brahim Attaf (Ed.), 2013, pp. 1-

24.

Books

47. A.N. Nayak and A.K. Nayak, “Advances in Mechanics and Materials”, VSS University of

Technology, Burla, India. (Edited Book), February 2012.

Technical Reports and Theses

48. R.A. Shenoi, P.K. Das, A.K. Nayak and J.I.R. Blake, “Safe Design of Composite Structures: A

Stochastic Approach”, Report Submitted to Ministry of Defence and British Maritime

Technology Limited, UK, 2007.

49. A.K. Nayak, G. Makarov, R.A. Shenoi and A. Groves, “Unconventional Structures with Hybrid

Materials with Superelastic Inserts”, Report Submitted to Defence Science and Technological

Laboratory, Ministry of Defence, UK, 2005.

50. A.K. Nayak, “On Dynamic Analysis of Laminated Composite and Sandwich Plates Using Finite

Element Method”, PhD Thesis, School of Civil Engineering and the Environment, Ship Science,

School of Engineering Sciences, University of Southampton, UK, March 2002.

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51. A.K. Nayak, “Nonlinear Finite Element Analysis of Visco-Plastic Axi-Symmetric Lap Joints”,

Master of Engineering Dissertation, Civil Engineering (Structures), Indian Institute of Science,

Bangalore, India, January 1999.

52. A.K. Nayak, “Behaviour of Reinforced Concrete Beams Under Shear and Computer Aided

Analysis of Plane Frames”, Bachelor of Engineering Thesis, Civil Engineering, National

Institute of Technology, Rourkela, India, April 1994.

53. A.K. Nayak, J.W. Gillespie Jr., D. Heider and E. Madenci “Thermo-transient Analysis of

Composite Sandwich Shells by Using a Closed Form First Order Theory”, Center for Composite

Materials, University of Delaware, USA, Internal Report 2008.

54. A.K. Nayak, J.W. Gillespie Jr. and D. Heider, “Testing and Analysis of T-Joint under Tensile

Loading”, Center for Composite Materials, University of Delaware, USA, Internal Report 2008.

55. A.K. Nayak and O. Prakash, “Thermal Stress Analysis of Laminated Composite Plates”, General

Electric Global Research, Internal Report 2008.

56. A.K. Nayak and O. Prakash, “High Performance Structures with Shape Memory Alloy Inserts”,

General Electric Global Research, Internal Report 2008.

57. K. Chandrasekhar, D. Patro, A.K. Nayak, S.C. Quek and C.S. Yerramalli, “Scaling Studies in

Modeling for Compressive Strength of Thick Composite Structures”, General Electric Global

Research, Internal Report 2010.

58. A.K. Nayak, Y. Yoon and M. Vermilyea, “Through thickness 8552 epoxy resin infusion in T700S

Carbon Tows: A Process Modeling Approach”, General Electric Global Research, Internal

Report 2010.

59. A.K. Nayak, R. Gupta, S. Subramanian, J. Zhu, X. Fang, R. Mills, W. Lin and S. Finn, “A Study

of Alternate Failure Modes in Thermoplastic Composite Sandwich Panels”, General Electric

Global Research, Internal Report 2010.

60. S. Singh and A.K. Nayak, “Stochastic Analysis of a Single Lap Joint Including Material and

Geometric Nonlinearity”, General Electric Global Research, Internal Report 2010.

61. S. Ahmad, P. Mahajan, D. Patro, A.K. Nayak and S. Subramanian, “Stochastic Analysis of

Composite Structures: A Critical Review”, General Electric Global Research, Internal Report

2010.

62. J. Rudd, R. Mahadevan and A.K. Nayak, “Durability of Super-Hydrophobic Surfaces'', General

Electric Global Research, Internal Report 2010.

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63. K. Chandrashekhar, C. Yerramalli, S.C. Quek, D. Patro, A.K. Nayak and S. Subramanian

“Stochastic Compression Response of Defect Laminates Using Micromechanical Models”,

General Electric Global Research, Internal Report 2010.

PhD Guidance On Going

J Munda, “Critical State of Soils ”, Joint Guidance with Prof P.K. Pradhan, Civil Engineering

Department, VSSUT, Burla. Status: PhD Registration done after completing the course works

One Journal paper published on “A Review on the performance of Modified Cam Clay Model for

fine grained soil” authored by J. Munda, P.K. Pradhan and A.K. Nayak, Journal of Civil

Engineering and Environmental Technology, 1(5), 2014, pp 62-67.

A.K. Satapathy, “Analysis of Composite Structures”, VSSUT, Burla, (Guide) Status: the course

works are complete, PhD Registration to be done, One Conference paper published on

“Stochastic free vibration analysis of composite sandwich plates”, authored by A.K. Satapathy

and A.K. Nayak, National Conference on Innovations in Design & Construction of Industrial

Structures, April 2014, NIT Durgapur India, pp. 83-88.

MTech Theses Guided

S.K. Patel, “Optimisation of Laminated Panels using Closed Form solution and the Finite

Element Method”, VSSUT, Burla, June 2013

R. Nayak, “Transient Analysis of Panels Using the Finite Element Method”, VSSUT, Burla, June

2013

P. P. Swain, “Stochastic Analysis of Laminated Panels Using Closed Form Solution and the

Finite Element Method”, VSSUT, Burla, December 2013.

A. Pal, “Transient Response of Plate Panels Using Closed Form Solution and the Finite Element

Method”, VSSUT, Burla, June 2014.

B. Das, “Free Vibration Analysis of Panels Using Closed Form Solution and the Finite Strip

Method”, VSSUT, Burla, June 2014.

K. Rambabu, “Dynamic Response of Panels Using Three Dimensional Finite Element Method”,

VSSUT, Burla, May 2016.

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S. Sahu, “Dynamic Analysis of Unsymmetrically Laminated Plates Using the Finite Element

Method”, VSSUT, Burla, December 2016.

R. Panigrahi, “Free Vibration and Buckling Analysis of Composite Sandwich Plates Using Finite

Strip and Finite Element Procedures”, VSSUT, Burla, June 2017.

MTech Guidance Ongoing

A. Panda, “Nonlinear Analysis of Adhesively Bonded Lap Joints”, To be Completed by June

2018

A. Mohanty, “Nonlinear Analysis of Composite Sandwich Plates”, To be Completed by June

2018

BTech Theses Guided

S. Singh, Stochastic analysis of a single lap joint including geometrical and material nonlinearity,

BITS Pilani, 2009

U. Pradhan, S. Sahoo, A. Nayak, S. Jena, J.K. Balabantaray, B.K. Panda, S. Sethi & D. Tibrewal,

Dynamic analysis of beams using the finite element method, VSSUT, Burla, 2013

A. Gantayat, G. Badatya, S.P. Nayak, S.K. Nayak, S.R. Bisoi, Free vibration analysis of plates

and plane frames using the finite element method, VSSUT, Burla, 2014.

A, Agrawal, A.K. Karn, D. Sharma, Analysis of plane frames and plates under dynamic loading

conditions using the finite element method, VSSUT, Burla, 2015.

K.R. Mishra and M. Tripathy, Plasticity Analysis of Beams and Plane Frames Using The Finite

Element Method, VSSUT, Burla, 2016.

J.P. Behera, S. Akshit, S. Panda, A. Sahu, S. Behera, D. Sahoo, Static Analysis of Plane Elasticity

Problems Using the Boundary Element, Element Free Galerkin and The Finite Element Method.

VSSUT, Burla, 2017

Short Term Courses

Attended Short term International PhD Course on Introduction to Sandwich Structures at

Denmark Technical University, Lyngby, 1999

Resource Person on The Finite Element Analysis of Sandwich Plates and Shells on the theory and

applications of sandwich structures in University of Southampton, UK, 2005.

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Resource Person on Design of Beams on AICTE approved short term course on Design of steel

structures using IS800-2007 in VSSUT, Burla 2012.

Attended Short term Course on Earthquake Behavior of Structures at National Institute of

Technology, Rourkela, 2013.

Computational Skills

: Programming: FORTRAN (77 and 90), C++

, C, MATLAB

: Engineering: MATLAB, MAPLE, MATHEMATICA

: Operating Systems: MICROSOFT XP, VISTA, WINDOWS7, WINDOWS8, LINUX, UNIX

: Database: MSWORD, EXCEL, POWERPOINT, LATEX

: Analysis Tools: PATRAN, ABAQUS, ANSYS, COMSOL, PAM-RTM

: CAD Tools: CATIA V5, SOLIDWORKS

: Six Sigma Tools: MINITAB, DFSS

Professional Activities

External Examiner for a PhD Thesis from Civil Engineering Department, IISc Bangalore.

External Examiner for MS Theses from PG Department of Environmental Sciences, Sambalpur

University

Reviewer of Journal of Composites Science and Technology.

Reviewer of Journal of Sound and Vibration.

Reviewer of Journal of Aerospace Engineering, IMechE, Part G.

Reviewer of Journal of Reliability and Safety.

Reviewer of Journal of Mechanical Engineering Sciences

Reviewer of Composites Part B: Engineering

Reviewer of Applied Mathematical Modelling

Reviewer of Steel and Composite Structures, An International Journal

Examiner for various UG/PG courses at VSSUT Burla apart from own taught courses

Preparation of a detailed estimate for the work on Construction of Shopping Complex in the Boys

Hostel Campus of VSSUT, Burla for the year 2012-13 and also preparation of detailed estimates

for development of smart class rooms in the University as part of the TEQIP team on Civil

Engineering Works

Acted as a Doctoral Scrutiny Committee, Board of Studies, Training and Placement and Purchase

Committee member in the University.

Organised classes for weaker students out of office working hours

Acted as a Center Supervisor at ITI, Balasore for OJEE 2013

Attended and presented report to the World bank team and concerned committee members as part

of the TEQIP team in 2nd

review meeting of TEQIP Phase-II from 13th and 14

th December 2012

14

Membership of Professional Societies

American Society of Mechanical Engineers

Institute of Electrical and Electronics Engineers

American Institute of Aeronautics and Astronautics

Awards and Honors

1999 Awarded Doctoral Fellowship to carry out Research Work at University of Southampton,

UK.

1997 Ranked 25th (99.41 Percentile) in Graduate Aptitude Test of Engineering-GATE 97 among

5565 examinees towards Master of Engineering Studies in India.

Management Training at M/s Unitech Limited, New Delhi

Undergone training on communication, finance, presentation and influencing skills, time

management, team effectiveness and talent development.

Construction Engineer at M/s Unitech Limited, New Delhi

Construction of a 100m reinforced concrete chimney for Oil & Gas Refineries in India

Construction of a four lane highway from sub-base to pavement level in India

Leadership Training at General Electric Global Research, Bangalore

Lean Six Sigma Green Belt DFSS Training- JFWTC, Bangalore

GEGR Presentation Skills at GE

GEGR IP Skills for Technologists

GEGR Influencing Skills at GRC

Head, Architecture Department, VSSUT, Burla

Introduced New Course Structure and syllabus for 5 BArch degree from 2015-2016

Outline Vision and Mission Statements for Architecture Department

Shared the teaching loads of the department substantially

Created a work culture having a continuous and never ending team spirit.

15

Professor-in-Charge Civil Works, VSSUT, Burla

Got involved in day-to-day civil maintenance work in the University for a better life style

Took great interest in the supply of water to the campus for healthy living

Shared the information towards the completion of the civil works in the University, Halls and

Quarters

Warden, Visakha Hall of Residence, VSSUT, Burla

Started first official Mess in VHR

Introduced Washing Machines in VHR

Economical mess expenditures in VHR

Maintained hygienic conditions in VHR

Winner of inter hostel Illumina 2012 and Rangoli 2013 events

Girls from VHR participated actively in Blood donation camps

Annual Functions cum Farewell to Final year students are organised in 2013 and 2014 in VHR

136 boarders out of 176 boarders are placed in various campus placements in 2013-2014

Vice President, VSSUT, Athletic Club, Burla

Conducted Inter University Sports Meet (IUSM) 2012 & 2014

Conducted Annual Athletic Meets Illumina 2013 & 2014

Gymnasium renovation in 2013

A new university record on Shotput (Gold, 10.97m) was set in ILLUMINA2K13. In NIT

Rourkela Sports Fest 2013, Football Team was Runner’s up while Cricket, Volleyball, Kabbadi

and Table Tennis Teams were placed in third position. In Indian School of Mines Dhanbad 2013

Sports Meet, University team won the Gold in Shotput and Triple Jump, Silver in Shotput and

Bronze in Triple Jump. Both Men and Womens’ Badminton teams were runner’s up in ISM

Dhanbad. Girls from Visakha Hall of Residence (VHR) started Girls NCC first time in the

University in the Independence day 15 August 2012.

Prof. I/C Computational Engineering Lab, Civil Engg. Deptt. VSSUT, Burla

Procured 10 modern desk top computers & UPS adding to the existing 32 desktop computers

Participated in raising the funds for CAD Technology Lab (12.5 Lakhs sanctioned)

Invited quotations for procurement of Staad-Pro, Plaxis and Vision Softwares from prospective

vendors

Initiated repair schedule for mal-functioning computers

16

Advisor, Civil Engineering Society, VSSUT, Burla

Conducted welcome and farewell ceremony for civil engineering graduates and post-graduates

Conducted lectures by experts (Prof MS Rao, Emeritus Professor from VSSUT, Burla and Er GP

Roy, Water Resources Department, Govt of Odisha)

Encouraged students for higher studies (many students took admissions in IITs, NITs, XIMB,

NICMAR and 3 students in USA)

Two students (Mr Abhisek Mohapatra and Mr Smruti Ranjan Bisoi) have been selected from east

zone for final round of National Civil Award competition for Civil/Structural Engineering

Students for the best innovative structural steel design 2013-2014 by INSDAG for the project on

“SKYWALK construction A cost effective solution for pedestrian under my supervision”.

Two students (Mr Deepak Kumar Rout and Mr Saunak Kumar Das) won the Aadhar 2015 Quiz

worth Rs 50,000/- and offer letters from OCL India Ltd organised by KONARK cement and

AIMA.

Strengths

Self-motivated, disciplined, dutiful and having effective communication skills.

References

Dr. S.R. Finn

Chief Engineer, Composites

Material System Technologies

General Electric Global Research

One Research Circle

Niskayuna, New York

NY 12309, USA

Tel No: (+1) 5183874064

finn@ge.com.

Relationship:Mentor

Prof. R.A. Shenoi

Professor, Head

Ship Science

School of Engineering Sciences

University of Southampton

Highfield, Southampton

SO17 1BJ, UK

Tel. No: (+44) 023 80 592356

r.a.shenoi@ship.soton.ac.uk.

Relationship:Mentor

Prof. S.S.J. Moy

Professor

School of Civil

Engineering & the Environment

University of Southampton

Highfield, Southampton

SO17 1BJ, UK

Tel No:(+44) 023 80 592846

S.S.Moy@soton.ac.uk

Relationship:Mentor

Dr. J.I.R. Blake

Associate Professor, Ship Science

School of Engineering Sciences

University of Southampton

Southampton, UK SO17 1BJ

Tel. No: (+44) 023 80 599544

James@ship.soton.ac.uk

Relationship:Research Colleague

Prof. P.C. Pandey

Professor

Civil Engineering

Indian Institute of Science

Bangalore, India, 560012

Tel No:(+91) 2293 2667

pcpandey@civil.iisc.ernet.in

Relationship:Mentor

17

Statement of Research

My background and research interests are in the areas of manufacturing, experimental, analytical and

computational mechanics of materials and structures in strategic applications. My research has focused on

the following areas:

Finite Element Method, Analytical and Experimental Techniques, Composite Plates and Shells, System

Identification, Vibration Control, Stability of Structures, Impact Analysis, Damage Detection and

Structural Health Monitoring, Failure Analysis of Joints, Shape Memory Alloys, Piezo-electric

Composites, Functionally Graded Materials, Manufacturing and Process Modeling of Composite

Structures.

A significant focus of my research has been on the development of innovative manufacturing,

experimental, analytical and computational techniques to analyse and design materials and structures that

are used in various engineering applications. These experimental and numerical methods have been

validated against standard benchmark problems to ascertain their behaviour in both static and dynamic

loading environments. Since defects in structures are predominant during manufacturing stages, a defect

methodology has been established to understand the behaviour of structures in practice. Currently

manufacturing, experimental, analytical and computational techniques are being pursued to study the

reliability analysis of materials and structures.

Research 2002-Present: The aims of the research have been to study the behaviour of materials to

improve the damage tolerance capability of structures under static and dynamic loading environments.

Research I: Engineering and Physical Sciences Research Council, UK Funded Project Composite

sandwich structures are finding usage in many weight related applications due to advantages associated

with the composite materials. One of the key features is to understand the behaviour of sandwich

structures under time dependent loading conditions. The following methodologies are developed to

understand the behaviour of sandwich structures:

developed generic models for vibrational behaviour of sandwich structures

implemented the solutions in a numerical finite element procedural scheme

understood the free vibration of pristine and damaged sandwich beams

characterized the forced vibration features of sandwich plates and beams

Research II: Defence Science Technology Laboratories, UK funded project It is well known that

most fibre-reinforced plastics are brittle in nature and in-plane failure is governed by the elongation at

break. So when the elongation at break of the resin is reached at a location, then the matrix cracks and the

load path redistributes. The matrix crack may be followed by fibre matrix debond and then either a

delamination or fibre failure. Generally when this happens, the laminate may be deemed to have failed.

However, if structural continuity and a minimum level of structural integrity could be maintained through

18

a layer of material that has a high strain to failure, possibly of a nonlinear elasto-plastic nature, then the

composite could take up the load through larger displacements (and corresponding strains). Hence certain

metallic materials such as stainless steel, aluminium or titanium that possess higher strain to failure (or

even superelastic) characteristics could delay the failure limit of conventional GRP composites. Thus if

one/some of the plies in a laminated composite were to be made of a ductile material, then it is possible

that the load carrying capability of a structure could be increased. It is seen that while most polymer

composites have failure strains of under 5 %, metals have a notably better ductile behaviour with strain to

failure of up to 40 %. Thus a combination of composite materials like, for example, woven roving glass

reinforced composite (GRP) and stainless steel in the form of a metallic mesh could offer many

advantages as compared to conventional GRP composite or metal structures. The advantages could

include improved damage tolerance capability, enhanced energy absorption characteristics, stiffness etc.

Metal inserts, which could be in the form of a metallic mesh, could also be used as a means of joining

structural components. Two generic schemes for attachment include inserts (plates, mesh, wires)

protruding out from composite structure providing an external attachment point and inserts encapsulated

by the composite structure. Hence the technique of incorporating metal inserts/attachments in composites

could provide significant improvements in both part performance and fabrication efficiency over bonding

and direct mechanical fastening. The potential for entrapment of the insert within locally tailored

continuous reinforcement giving added strength and durability to the joint also adds to the allure of

assembly through the use of metal inserts.

Due to availability of various forms of metal inserts, the designer has the liberty in choosing various

combinations to suit the design requirements. One possibility could be in the form of a metallic mesh

which could be integrated easily into composite structures to give added ductility to improve their

structural performances. To assess the mechanical behaviour of GRP composites encapsulating metallic

mesh, an experimental investigation is carried out by combining five plies of Woven roving GRP

composite with four plies of stainless steel mesh under tensile progressive loading. Finite element

analysis is carried out in ABAQUS with a shear deformable doubly curved shell element to incorporate

the Hashin type failure criteria of composites along with the Von-Mises failure criteria of metal mesh.

Numerical results are presented to illustrate the present approach. Hence, the following methodologies are

achieved:

developed models for mechanical characterization of brittle laminates with highly ductile metal

inserts

developed and applied progressive damage models to such hybrid laminates

conducted experiments to understand the manufacturing process

Research III: Reliability analysis of composite structures funded by Ministry of Defence, UK and

British Maritime Technology Limited, UK There is increasing interest in the use of lightweight,

polymer composite structures for a variety of applications in underwater structures. These applications are

in the form of single skin stiffened structures as well as monocoque single skin and sandwich

configurations. The structures could potentially be made up using different fibre types, fibre architectures

19

and weaves, resins, core materials; there could be further variations owing to volume fractions and

geometric/topological layouts. Also, there is further choice in processing routes as well. One could

consider the use of low temperature cure prepregs or alternatively consider vacuum assisted resin infusion

moulding. These processes too have many in-built variabilities. Current trends in marine (ship/boat)

design use conservative safety indices based mainly on some limiting strain value. This approach

however does have drawbacks. The limiting strain value (usually an in-plane strain) may not pick up the

load transfer mechanism adequately and hence may not model dominant failure modes adequately.

Currently little or no allowance is made for variabilities in design parameters, processing parameters and

topological indices.

One solution to this problem is to integrate well established reliability techniques with composite

structure design. There are various established techniques to carry out reliability analysis such as FORM,

SORM, Monte Carlo Simulation and depending on the type of problem, one or the other methods can be

applied.. One of the difficult problems in composites will be to define the failure surface for various limit

states and also the uncertainties of different design variables involved in the definition of the limit states.

Surmounting these issues will reduce the level of uncertainty in adopting composites as a construction

material and widen the engineer's choice of design solutions. The strategic goal is to develop a new

stochastic approach to the design of composite structures that is able to account for variations in material

properties, geometric indices and processing techniques, from the component level to the full system

level. The following methodologies are achieved:

A systematic review of system reliability methods is done

A review of system reliability software is carried out

Various models on time-variant reliability are put forward

An example showing how FE methods can be interfaced with FORM/SORM is shown

Reliability analyses of a laminated composite plate under two loading conditions and two ply

orientations are carried out

A sensitivity analysis of the laminated plate shows the greatest influence of load on the

probability of failure followed by material property

Reliability analysis under uniaxial loading are carried out for two example problems.

Research IV: Optimal Design of T-Joints funded by 3-TEX INC and US NAVY at Center for

Composite Materials, University of Delaware, USA Composite materials are used in many strategic

applications due to their high strength and stiffness to weight ratio. Sandwich structures are preferred in

many weight related applications with light weight balsa cores and thin composite skins. Joints are

inevitable in marine vessels to transfer the load through composite assemblies. The joints could be in the

form of bonded and bolted joints. One of the widely used method is the use of T-Joints in marine

applications. The performance of the hull and bulkhead depends on the use of T-joints as a connecting

element. Various loads in the form of wave impact, structural and cargo weight as well as various actions

such as docking and berthing loads act on T-Joints during their operational period. Hence the study of T-

20

Joints has been very vital to understand their load carrying capacity. The following methodologies are

developed:

Fabrication of large scale joining elements for T-Joint: a base line joint was prepared with large

triangular blocks of balsa as a filler material

Preparation of the test matrix: A variety of baseline joining approaches with 3TEX material is

utilized

Manufacturing trials on T-joints: The experimental investigation of core fabrication issues and

related problem with the infusion of the joint was carried out

Flow behaviour during joint fabrication: Corn syrup with a viscosity of 512mPas was infused

from one end to the vent located on the vertical wall of the plexiglass. The arrival time as a

function of location on the balsa core (bottom and top) was recorded

Bulkhead Fabrication: Two large bulkheads were fabricated using a quasi-isotropic lay-up to

produce an approximately thick face sheet on each side

Fabrication of joints: Multiple joint specimens were fabricated

Fabrication of flanges: Several flanges were manufactured using carbon fabric

Joint fabrication and test preparation: The fabricated flanges were adhesively bonded using a

plexus adhesive to the bulkheads. Prior to bonding, the surfaces were treated using acetone to

clean out all unwanted particles that may hinder poor bonding

Mechanical testing: The experiment was conducted on an Instron testing machine. 10 strain gages

were set up on critical points on this part to observe the strain occurring during loading and one

LVDT (Linear Variable Differential Transformer) was used to observe the displacement at the

center of the base panel. Two dial gages were placed on the bolts to check on deflection of the

bolts if any during testing

Finite element model: CATIA V5 was used to evaluate the performance of composites using

three dimensional elements. Later on MSC/PATRAN was used as the pre-processor for T-joint

analysis. For the simulations and post-processing steps, ABAQUS was used. Both plane stress

and plane strain conditions are assumed

Analysis using generalised plane strain elements: A generalised plane strain element was

implemented to evaluate the through thickness stresses of laminates under tensile loading

Research V: Durability of Super-Hydrophobic Surfaces funded by Nano-Advanced Technology

Program, General Electric Energy Super-hydrophobic surfaces are finding usages in many strategic

applications such as contamination prevention, biocompatibility, enhanced lubricity and durability of

materials. The contact angle of pure water on a clean solid surface determines the degree of hydro-

phobicity. The surface energy and roughness of the solid surface influence the water-solid contact angle.

The understanding of phenomenon associated with contact angles along with the development of textured

super-hydrophobic surfaces with varying configurations is crucial for the applications. The following

methodologies are developed:

Contact angle, Contact angle hysteresis and super-hydrophobic surfaces are being studied

21

Critical pressure on model surfaces with grid and square pillars in a rectangular matrix has been

evaluated

Fabrication issues on super-hydrophobic surfaces with square holes and square pillars have been

discussed

Contact angle is measured in a dynamic contact angle analyzer

Hardness is examined on nanoPAA on alumina substrate using a Vickers indentor

Material models for solid alumina and Nano-PAA have been undertaken using ABAQUS

The behaviour of indentation load versus indentation depth is studied

Variation of Young's modulus and Poisson's ratio has been studied with respect to pore size and

pore fraction

The variation of Wetting angle and normalized hardness vis-a-vis pore size and pore fraction has

been investigated

The relative importance of square pack and hexagonal pack has been discussed

For pillars and holes with varying air fractions, three dimensional modelling in PATRAN and

ABAQUS has been carried out to investigate the relative advantages.

Research VI:Scaling Studies in Modeling for Compressive Strength of Thick Composite Structures,

funded under X-Plan Program, General Electric Energy Large composite part thicknesses in some

load bearing applications lead to defects in the form of fiber waves, voids and de-laminations during

manufacturing. It is well known that composite compressive strength is a strong function of fiber

alignment, and fiber waviness can cause failure due to fiber microbuckling and kinking or failure by

splitting at the fiber/resin interface. Hence scaling studies in modelling for compressive strength of thick

composite structures has been important to understand their behaviour. The following methodologies

have been developed:

a micromechanics approach in which individual fiber and resin layers are explicitly modelled in

ANSYS

a tow level approach in which the fiber and resin properties are homogenized to generate

effective properties of a tow in ANSYS

Material properties of epoxy resin has been obtained experimentally

The geometric inputs of defects and elasto-plastic material parameters has been used to generate

the model through ANSYS scripts

The surface and interior defect waves are generated using a combination of a cosine function and

a circular fillet that smoothly transitions the cosine curve to the straight portion of the coupon.

Propagating the surface wave towards the root defect along directions obtained using the surface

and root defect waves generates the intermediate layers. The intermediate layers will be of

uniform thickness only for the case when this propagation direction coincides with the normal at

each point on the cosine curves. For any other direction of propagation, the layers will have non-

uniform thicknesses

22

An inverse geometry calculation is performed over a design space to find the right required input

geometry values that will generate the desired user-input geometries. The user-input geometry is

set as the target with respect to which the cost of deviating is minimized

A nonlinear large deformation analysis is carried out using displacement controlled axial

compressive loading applied to the end faces, each of which is coupled to a multi-point constraint

(MPC) node. The peak load is captured as a nodal reaction load at the point of unloading,

representing a fiber micro-buckling instability

Research VII: A Study of Alternate Failure Modes in Thermoplastic Composite Sandwich Panels,

funded by SABIC Innovative Plastic Inc (formerly GE Plastics) Thermoplastic composites possess

increased fracture toughness and impact tolerance properties, higher chemical stability and unlimited self

life of raw materials, no volatile organic compounds so as to have a cleaner working environment with

reduced issues in material handling, reduced manufacturing costs with significant tooling cost savings,

increased opportunity for part integration as numerous components can be combined into one single

module which provides savings in tooling and assembly. Due to the above advantages, thermoplastic

composites are widely preferred in many strategic applications. The following methodologies have been

developed to study alternate failure modes in thermoplastic composite sandwich panels:

The linear and nonlinear relationship between the applied loading such as moment and stresses or

strains in the sandwich beams, based on the properties and dimensions of the components of the

beam has been carried out analytically to understand the behaviour of sandwich panels

A number of failure modes such as wrinkling of the compression skin, core failure and

indentation of the loaded skin has been analysed analytically

Constitutive modelling of the crushable foam such as Ultem foam has been incorporated in

ABAQUS and verified with experimental results

Basic mechanical properties of Ultem foam under uni-axial compression, tension, three-point

bending and shear have been carried out in laboratory tests

The computational models are carried out in Hypermesh and ABAQUS to validate the test results

The composite sandwich panels with TenCate skin and Ultem foam are tested and

PATRAN/ABAQUS has been used to generated three dimensional models to validate the

experiments.

Research VIII: Stochastic Compression Response of Defect Laminates Using Micro-mechanical

Models, funded under X-Plan Program, General Electric Energy Composite materials possess certain

inherent characteristics which give rise to waviness. During manufacturing processing of these materials,

waviness occurs as a result of residual thermal stresses from different thermal coefficient mismatch

between fiber and resin. Waviness occurrence in structures composed of composite materials has a

knockdown on load carrying capacity in compression. Hence the study of variability of waves and

wrinkles as a particular form of defect is very important to understand their behaviour. The following

methodologies have been developed:

23

Micromechanical representation of defect laminates with a resin block at the interior has been

undertaken in APDL script in ANSYS

Ramberg-Osgood representations of material curves from experiment have been carried out

Transfer function approach has been used to obtain compressive strengths for chosen values of

geometric parameters of defects

The assumed statistical distributions of defect parameters using Monte-Carlo simulation is

implemented in Crystal Ball software package

Research IX: Through thickness 8552 epoxy resin Infusion in T700S Carbon Tows: A process

modeling approach, funded under General Electric Aviation CEO Program The composites are used

in many weight related applications in aerospace structures. Due to the high performance requirement in

aircraft engine parts such as fan blade and fan case, the composites must confirm to varying

specifications. In order to manufacture defect free air worthy components like fan containment cases, the

manufacturing aspects are very important. Autoclave processing is widely used in manufacturing of

aerospace components. Most recently inline infusion has become a very cost effective approach in

meeting the challenging needs of aerospace industry. Hence understanding resin infusion process in

composite manufacturing is very vital for defect free parts. The following methodologies have been

developed:

Experiment on a rheometric RMS-800 parallel plate rheometer has been conducted to understand

the change of viscosity with respect to the change in temperature

The relationship between viscosity and temperature is given by Arrhenius type expressions

A modified Kozeny Carman equation is used to simulate the experimental observation

Fiber volume fraction as a function of Compaction pressure has been obtained through

experiments and validated using Cai & Gutowski model

Capillary pressure as a function of contact angle, diameter of filament, surface tension and type of

resin flow has been incorporated

The models have been incorporated in PAM-RTM software using constant and varying viscosity

models

A refined and novel variable permeability model has been presented to validate resin infusion

under varying pressure and temperature conditions

Research X: Passive Morphing for Fan Blades, funded under General Electric Aviation CEO

Program Composite fan blades are increasingly used due to various advantages associated with

composite materials. The following methodologies have been incorporated:

The centrifugal load is found to be directly proportional to the rpm of the blade. Both rpm

loadings under cruise and maximum climb have been taken in computation

Panel level idealization at the trailing edge has been made for giving maximum camber angle

with varying lay-ups

Optimization techniques are used to come up with ideal lay-up

A set of boundary conditions is assumed

24

Hybrid material concept has been adopted

Various shapes for leading edge, trailing edge, root and tip have been incorporated using APDL

scripts in ANSYS

Research XI: Stochastic Analysis of a Single Lap Joint Including Material and Geometric

Nonlinearity, General Electric Internal Funding for development of ideas for General Electric

Aviation Adhesive bonding is widely used in aircraft structures, primarily because it offers a low weight,

fatigue-resistant, and aerodynamically sound method of assembly. Adhesive bonding is also less labor

and cost-intensive when applied to large structures such as those commonly utilized in aircraft

manufacturing. The advantages associated with adhesive bonding include more uniform stress

distribution, assembly of materials of varying types and thicknesses, excellent strength to weight ratio,

lower production cost as compared to traditional assembly methods and excellent fatigue strength. Owing

to the distinct advantages offered, joints are inevitable in structural applications. Adhesives used in these

joints are usually polymeric materials, which exhibit non-linear material behaviour like elasto-plasticity

or visco-plasticity. The following computational methodologies have been developed:

A single element patch test has been performed in ANSYS and ABAQUS for probabilistic

analysis

In ABAQUS, a python script to run the required number of analyses using Monte Carlo

Simulations is implemented and ABAQUS CAE is used to run the script

An online cumulative probability calculator is used to calculate the probability of failure for each

value of load

An S-shaped curve has been obtained from both ANSYS and ABAQUS

Plasticity models of FM 73 resin have been incorporated in ABAQUS

Both two and three dimensional analyses have been carried out in ABAQUS for peel and shear

stress distributions

The loading versus probability of failure of S-shaped curve in a single lap joint has been obtained

using ABAQUS

Research XII: Thermal stress Analysis of Laminated Composite Plates General Electric Internal

Funding for Development of Ideas for General Electric Oil and Gas During the service conditions,

shell structures are subjected to thermo-mechanical loads. The following methodologies are undertaken:

A feasibility study has been undertaken to study the thermal response of laminated plates using

FORTRAN programming language

A novel plate bending element has been developed

Research XIII: High Performance Structures with Shape Memory Alloy Inserts General Electric

Internal Funding for Development of Ideas for General Electric oil and Gas Advanced structures

with enhanced performance and functionality often employ multiple materials including composites and

smart materials. The use of super-elastic inserts in the form of Shape Memory Alloy in joints and efficient

25

and reliable techniques to analyse joints in many engineering structures is vital to understand the

response. The following methodologies have been developed:

The material properties for the shape memory alloy have been incorporated using Liang and

Rogers Model

A new mixed interpolation of tensorial components (MITC) three dimensional degenerated shell

finite element plasticity model has been incorporated to validate the test results of shape memory

alloy

A single lap joint with shape memory alloy inserts has been analysed in ABAQUS

Research XIV: Stochastic Analysis of Composite Structures funded under General Electric Internal

Funding for General Electric Aviation Program While designers and manufacturers are opting for

composite materials in new applications, composites in many situations show fragility and susceptibility

to damage under conventional loads, both during initial processing and in service. Uneven temperature

and pressure distributions in the autoclave during manufacturing inevitably lead to imperfections in the

final laminate. Sometimes, minor impacts during initial assembly process can produce major damage on a

thin walled composite structure. Composites also perform poorly at high temperature and show reduced

failure strain at low temperatures. Inherent high variability in material properties and geometric values

arise due to heterogeneous make up of its constituent. Thus manufacturing techniques, loading,

environmental conditions, composite architecture and geometry etc all have an effect on the mechanical

behaviour. Any uncertainties in these conditions lead to uncertainties in the failure strength of composites.

The following methodologies have been incorporated:

A critical review has been undertaken to know the available computational techniques

The probability analysis is carried out in ANSYS for a simply supported laminated composite

plates with varying material properties and lamina orientations

Research XV: A computer aided FEM based numerical solution for transient response of laminated

composite plates with cutouts during Research Interaction with Ship Science, University of

Southampton, UK Cutouts are inevitable in many practical locations in the form of access ports for

electro-mechanical systems, damage inspection and altering the resonant frequency of the structures. The

following finite element methodologies have been developed:

A new assumed strain four node higher order plate bending element with three translations, two

rotations of the normals about the plate mid-plane, two warps of the normals and one drilling

rotational degree of freedom per node without shear correction factors has been developed

Consistent mass matrix is employed to evaluate the kinetic energy of the system

Newmark integration scheme is used to integrate the governing equations of motion

Numerical studies from the present computer aided finite element method based solution for

transient response of composite plates with cutouts are discussed

Research XVI: A study of thermal stresses in laminated composite plates during Research

Interaction with Ship Science, University of Southampton, UK Laminated composite plates are used

26

in many strategic applications under thermal conditions. The following computational methodologies

have been developed:

A new nine node iso-parametric plate bending element is developed based on a first order shear

deformation theory with shear correction factors from strain energy considerations

The new unified plate bending element contains three translations, two rotations of the normals

about the plate mid-plane

The mixed interpolation of tensorial components (MITC) technique is applied to get rid of

troublesome shear locking and parasitic spurious zero energy modes in the formulation

An empirical shear correction factor is applied to obtain the Classical Plate Theory (CPT) Results

from First order Shear Deformation Plate Theory (FSDT)

Transverse shear stress quantities are obtained by integrating the equilibrium equations

New results are presented on thermo-elastic response of laminated composite plates

Research XVII:A study of thermo-transient response of composite sandwich shells during Research

Interaction with Ship Science, University of Southampton, UK Composite sandwich shells are used in

many weight-related applications. One of the issues is to study the response of composite sandwich shells

under thermo-transient conditions. The following methodologies are developed:

A unified analytical first-order shear deformation shell theory is developed

A Navier-type solution along with the Newmark integration scheme is used to integrate the

governing equations of motion

An a-priori shear correction factor is employed to predict the dynamic response

An empirical shear correction factor is proposed for the shear deformation shell theory to obtain

the equivalent Classical Shell Theory

New results are presented on thermo-transient response of composite sandwich shells

Research XVIII:Analysis of damping response of composite sandwich folded plates during

Research Interaction with Ship Science, University of Southampton, UK Shell structures have a wide

range of engineering applications. Damping is a significant dynamic parameter which effects structural

fatigue and vibration amplitudes at elastic resonant frequencies and attenuates structure borne noise. The

following computational techniques have been developed:

A new four node iso-parametric flat facetted shell element with drilling rotational degrees of

freedom based on a first order shear deformation theory with shear correction factors has been

developed

The new shell element contains three translations, two rotations of the normals about the shell

mid-plane, and one drilling rotational degree of freedom per node

A consistent mass matrix formulation is employed to evaluate the total kinetic energy of the

system

Analytical solutions based on first order shear deformation theory and classical theory are

implemented

New results are presented for the damping analysis of composite folded plate structures

27

Research XIX: Stress analysis of thermoplastic composite sandwich plates during Research

Interaction with Ship Science, University of Southampton, UK Thermoplastic composite materials are

used in many challenging applications due to their improved properties in stiffness, strength, weight,

corrosion resistance, thermal properties, fatigue life and wear resistance. During their service conditions,

thermoplastic composite sandwich structures are subjected to varying loads. Hence the effects on

mechanical loads on the response of thermoplastic composite structures have been important to

understand their behaviour. The following methodologies are developed:

A nine node iso-parametric plate bending element is developed based on a refined higher order

theory without the use of shear correction factors

The new refined third order plate bending element contains three translations, two rotations and

two warpings of the normals about the plate mid-plane

The Mixed interpolation of tensorial components (MITC) technique is applied to get rid of

troublesome shear locking and parasitic spurious zero energy modes

Analytical formulations based on a refined third order theory are implemented

Transverse shear stress quantities are obtained by integrating the equilibrium equations

New results on thermoplastic sandwich panels are presented

Research XX: A Study of transient response of initially stressed composite sandwich folded plates

during Research Interaction with Ship Science, University of Southampton, UK With the advent of

fiber-reinforced laminated composites, the applicability of shell structures has increased many folds due

to their low weight, high stiffness and high strength properties. During their build and fabrication,

sandwich structures are subjected to various edge loads which can lead quickly to failure. Hence the

effects of initial stresses on the dynamic response of composite sandwich shells are very important to

understand their behaviour. The following finite element techniques are developed:

A new four node flat facetted shell element with drilling rotational degrees of freedom based on a

first order shear deformation theory with shear correction factors has been developed

A consistent mass matrix formulation is employed to evaluate the total kinetic energy of the

system

The Mixed interpolation of Tensorial Components (MITC) scheme is used to get rid of shear

locking and spurious zero energy modes in the formulation

New results are presented for the transient analysis of initially stressed composite sandwich

folded plate structures

Research and Consultancy Projects XXI in VSSUT, Burla: A project proposal was submitted to DST,

New Delhi in 2012 to understand the stochastic behaviour of composite structures which find applications

in various land based structures. Also as a part of Civil Engineering Team at VSSUT, Burla, the project

proposal on Advanced Civil Engineering Design using CAD and CAM has been submitted DST, Odisha

in December 2011. Most recently Department of Civil Engineering was granted a sum of rupees twelve

lakhs and fifty thousand to develop Civil Engineering Technology Lab based on above proposals for

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CAD and CAM. I carried out Consultancy projects on Design of Overhead Tank, Ground Reservoir and

Treatment Plant at Sambalpur funded by Executive Engineer Sambalpur Division in 2013. I have proof

checked the designs regarding Preperation of DPR for rural piped water supply project to khaliapani and

adjoining villages of Nuapada district in 2014. I am a member of PMGSY and STA on water supply

projects in VSSUT, Burla. I have given Consultancy services to other technical consultants on design of

over head tanks with staging and underground reservoirs on water supply projects.

Ph.D. Research: On Dynamic Analysis of Laminated Composite and Sandwich Plates Using Finite

Element Method.

Now-a-days design is becoming performance oriented. Indeed, the tendency is to produce lighter, stronger

and more economically efficient structures without altering their structural integrity. During their

operating life, structures are subjected to various levels of vibration due to the natural environment in

which they are operating. Consequently dynamic analysis as well as static analysis need to be carried out

at the design stage in order to accurately optimize the design of structural members, to avoid resonance

and fatigue damage and to minimize damage of sensitive equipment and improve comfort of the

occupants of the structure. The objective of this research was to study the behaviour of plate structures

under dynamic loading environment using newly developed plate bending elements. A brief review of the

current finite elements for dynamic analyses of plate structures was given. Two new multi-layered plate

bending elements (DKT/CST and DKT/LST) were developed, based on a combination of the three noded

Discrete Kirchhoff theory (DKT) triangular plate bending element, the three noded constant strain triangle

(CST) and the six noded linear strain triangle (LST). Both frequency independent and frequency

dependent damping of viscoelastic materials were considered. An iterative complex eigensolver was used

to compute the natural frequencies and loss factors. Several benchmark problems were solved using these

new multi-layer plate elements. As the plate bending elements previously developed on the basis of

Kirchhoff's theory are inadequate for thick plate analysis, several quadrilateral Mindlin plate bending

elements (four and nine node Lagrange elements, eight node serendipity element, nine node Heterosis

element and four and nine node assumed strain elements) were developed to study the behaviour of

Mindlin plates. The plate bending elements based on Mindlin theory require either constant or variable

shear correction factors in their formulations. Hence two new Co four and nine node assumed strain finite

element formulations of a refined third order theory which did not require shear correction factors, were

developed and used to analyse isotropic, orthotropic, and layered anisotropic composite and sandwich

plates under free vibration, damping and transient loading conditions. Parametric effects of plate aspect

ratio, length to thickness ratio, degree of orthotropy, number of layers and lamination scheme on the

natural frequencies (free vibration), loss factors (damping) and dynamic (transient) responses were

investigated. The results presented in this investigation have been useful in better understanding the

behaviour of sandwich laminates under dynamic conditions and are potentially beneficial for designers of

sandwich structures.

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M.E. Research: Nonlinear Finite Element Analysis of Visco-Plastic Axi-Symmetric Lap Joints.

Adhesive bonded joints are usually preferred in composite structures due to their intrinsic advantages of

having minimal sources of stress concentrations, efficient load transfer over a large bonding area, superior

fatigue resistance and high strength-weight ratio compared to the conventional joints. In the present work

adhesive bonded axi-symmetric joints were analyzed using the finite element method, considering the

adhesive as elasto-viscoplastic material. A finite element formulation was adopted, considering material

nonlinearity for the adhesive and geometric nonlinearity for both adhesive and the adherend. The

formulation developed was thoroughly tested with some standard benchmark problems. The viscoplastic

approach was used to study time dependent phenomena. The same algorithm was also adopted to

investigate the elasto-plastic stress distribution in the joint under steady state conditions.

B.E. Research: Behaviour of Reinforced Concrete Beams Under Shear and Computer Aided Analysis of

Plane Frames

The beams are designed to test as to fail by shear only in the Laboratory. The failure pattern has been

found to conform to shear compression failure. The cube strength and the corresponding cylinder strength

obtained from tests is found to exceed the characteristic compressive strength of concrete of the

respective grade by a comfortable margin. This implies quality has been achieved in casting process. The

yield stress of HYSD bars tested has been found to be 580.5 MPa which is well above the nominal value

of 415 MPa. It is found that the ultimate moment of resistance of beams obtained from the test results

exceeds the nominal moment of resistance obtained by using the concrete grade M15 and steel grade

Fe415 but falls short of the actual moment of resistance obtained by putting values of fck and fst obtained

from material tests both by IS and BS code prescribed methods. It is understood that the moment of

resistance prescribed by the codes is for the case of failure by bending. However, before the beams could

reach that value of the moment or resistance, they failed under shear, a worse criterion. In other words, if

the beams had been restrained against failure by shear, they would have definitely exceeded the

theoretical moment of resistance. We can find the the moments of resistance of beams obtained from test

results exceed the moments corresponding to shear strength of beams as given by the Indian and British

Codes. The Codes however, give moment value or for that matter, the shear strength corresponding to the

appearance of first crack in the beam. It is found that the moments of resistance of the beams

corresponding to the appearance of first crack are found to exceed the theoretically specified values. The

average of the ratio of the tested resistance value to the value obtained following IS Code method is

obtained as 1.72. Thanks to Computer Aided Structural Analysis, the analysis of a 30 storeyed building is

done based on analysis of plane frames by stiffness method. The results are exactly matched with

previously published results from the literature.

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PhD Research I Guidance Ongoing: A review on the performance of Modified Cam Clay Model for

Fine Grained Soil

The Modified Cam Clay (MCC) is one of the most widely used soil models. It was developed by the

researchers at Cambridge University, UK. The MCC model works very well for predicting the behaviour

of normally consolidated clays, but it can not predict many important features of the behaviour of over

consolidated clays. The original cam clay model was first introduced by Roscoe and Schofield. But this

model was found some deficient in some aspects namely yield surface and the predicted value of Ko

(coefficient earth pressure at rest). Later on MCC model was developed by Roscoe and Burland to solve

theses problems. The MCC is an elastic-plastic strain hardening model and is based on the critical state

theory. The MCC model is used to predict the behaviour of locally available clayey soil and validated

with the experimental results. A series of Triaxial tests (drained and undrained conditions) and

Consolidation tests have been conducted on two samples. A comparison is made between the predictions

given by MCC model with experimental data of different soil samples. From the above comparison it is

observed that the model predicted results match well with experimental values under drained condition

for all the samples tested, but in undrained condition substantive deviations are observed.

The remaining part will be further development of modified cam clay model and its computer code using

critical state soil mechanics, validating the code by using commercial software like PLAXIS, evaluating

the soil parameters/behaviour by conducting a set of experiments using local fine grained soil.

PhD Research II Guidance Ongoing: Stochastic free vibration analysis of composite sandwich plates

In this topic, stochastic analysis of composite sandwich plates has been carried out using a nine node

Heterosis plate bending element. The plate bending element contains one transverse displacement and two

rotations of the normals about the plate’s mid-plane. Selective reduced integration scheme is adopted to

integrate terms associated with the stiffness matrix formulations. Both lumped and consistent mass

matrices are considered in the analysis. The accuracy and reliability of the present finite element

formulation is verified with previously published results in the literature. New results are presented to

examine the effects of boundary conditions and plate geometries.

The remaining part will be further development of finite element based stochastic models to study the

static and dynamic response of composite laminated and sandwich plates under geometric and material

uncertainties.

M.Tech. Research Guided Topic I: Optimization of laminated panels using closed form solution and the

finite element method

The objective of this thesis is to study the behaviour of laminated beam/plate structures using

static/dynamic loading environment using developed closed form solutions based on third order theory

and plate bending elements based on classical laminated plate theory. A brief review of the current closed

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form solutions and finite elements for static/dynamic analyses of beam/plate aspect ratio and length to

thickness ratio on the natural frequencies (free vibration) and buckling loads have been shown. The

results presented in this investigation could be useful in better understanding the behaviour of laminated

beam/plate structures under static/dynamic conditions and potentially beneficial for designers of

laminated beam/plate structures.

M.Tech. Research Guided Topic II: Transient analysis of panels using the finite element method

The objective of this thesis is to study the behaviour of beam structures under dynamic loading

environment using developed beam bending elements. A brief review of the current finite elements for

dynamic analyses of beam structures is given. Parametric effects of beam aspect ratio and length to

thickness ratio on the natural frequencies (forced vibration) dynamic (transient) responses have been

shown. The results presented in this investigation could be useful in better understanding the behaviour of

beam structures under dynamic conditions and potentially beneficial for designers of beam structures.

M.Tech. Research Guided Topic III: Stochastic analysis of laminated panels using closed form solution

and the finite element method

The objective of this thesis is to study the behaviour of laminated beam/plate structures under

static/dynamic loading environment using developed closed form solution based on classical laminated

plate theory and Kirchhoff plate bending element. A brief review of the current closed form solutions and

finite elements for static/dynamic analysis of beam/plate structures is given. Parametric effects of

beam/plate aspect ratio and length to thickness ratio on the natural frequencies have been shown. The

results presented in this investigation could be useful in better understanding the behaviour of laminated

beam/plate structures under static/dynamic conditions and potentially beneficial for designers of

laminated beam/plate structures.

M.Tech. Research Guided Topic IV: Transient response of plate panels using closed form solution and

the finite element method

The objective of this thesis is to study the static/dynamic behaviour of laminated plate structures under

varying loading environment using developed closed form solution based on classical laminated plate

theory and Discrete Kirchhoff triangular plate bending element. A brief review of the current closed form

solutions and finite elements for static/dynamic analysis of plate structures is given. Parametric effects of

plate aspect ratio and length to thickness ratio have been shown. The results presented in this

investigation could be useful in better understanding the dynamic behaviour of laminated plate structures

under time dependent loading conditions and potentially beneficial for designers of laminated composite

and sandwich plate structures.

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M.Tech. Research Guided Topic V: Free vibration analysis of panels using closed form solution and

the finite strip method

The objective of this thesis is to study the dynamic behaviour of isotropic plate structures under free

vibration condition using developed closed form solution based on first order shear deformation shell

theory and cubic finite strip element. A brief review of the current closed form solutions and finite strips

for dynamic analyses of plate structures is given. Parametric effects of plate aspect ratio and length to

thickness ratio have been shown. The results presented in this investigation could be useful in better

understanding the dynamic behaviour of plate structures under free vibration conditions and potentially

beneficial for designers of plate structures.

M.Tech. Research Guided Topic VI: Dynamic response of panels using three dimensional finite

element method

The objective of this thesis is to study the static/dynamic behaviour of beam/solid structures under

varying loading environment using developed beam bending and three dimensional finite elements. A

brief review of the current finite elements for static/dynamic analyses of beam and solid structures is

given. Parametric effects of beam/solid aspect ratio and length to thickness ratio on the natural

frequencies (free vibration) and dynamic (transient) responses have been shown. The results presented in

this investigation could be useful in better understanding the behaviour of beam/solid structures under

time dependent loading conditions and potentially beneficial for designers of beam/solid structures.

MTech. Research Guided Topic VII: Dynamic analysis of unsymmetrically laminated plates using the

finite element method

The objective of this thesis is to study the static/dynamic behaviour of un-symmetrically laminated

beam/plate structures under varying loading environment using developed nine node and eight node plate

bending elements. A brief review of the current finite elements for static/dynamic analyses of beam/plate

structures is given. Parametric effects of beam/plate aspect ratio and length to thickness ratio have been

shown. The results presented in this investigation could be useful in better understanding the dynamic

behaviour of un-symmetrically laminated beam/plate structures under time dependent loading conditions

and potentially beneficial for designers of laminated beam/plate structures.

MTech Research Guided Topic VIII. Free vibration and buckling analysis of composite sandwich

plates using finite strip and finite element procedures

The objective of this thesis is to study the free vibration and buckling behaviour of composite sandwich

plates using finite strip and finite element procedures. A brief review of finite strip and finite element

techniques for free vibration and bucking analyses is given. A range of problems has been solved to

illustrate the approach. The results presented in this investigation could be useful in better understanding

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the free vibration and buckling behaviour of laminated composite and sandwich plates and potentially

beneficial for designers of strategic structures.

B.Tech. Research Guided Topic I: Stochastic analysis of a single lap joint including geometrical and

material nonlinearity

The stochastic analysis of a single lap joint has been carried out with geometric and material nonlinearity.

A parametric study of the two dimensional finite element model of the single lap joint has also been

undertaken by varying the lap thickness and the lap overlap length. The findings could help in

understanding the stochastic behaviour of lap joints which find applications in aerospace industries.

B.Tech. Research Guided Topic II: Dynamic analysis of beams using the finite element method

The objective of this thesis is to study the behaviour of beam structures under dynamic loading

environment using developed beam bending elements. A brief review of the current finite elements for

dynamic analyses of beam structures is given. Parametric effects of beam aspect ratio and length to

thickness ratio on the natural frequencies (free vibration) buckling loads and dynamic (transient)

responses have been shown. The results presented in this investigation could be useful in better

understanding the behaviour of beam structures under dynamic conditions and potentially beneficial for

designers of beam structures.

B.Tech. Research Guided Topic III: Free vibration analysis of plates and plane frames using the finite

element method

The objective of this thesis is to study the behaviour of plate and plane frame structures under dynamic

loading environment using Mindlin plate bending and frame elements. A brief review of the current finite

elements for dynamic analyses of plate structures is given. As the plate bending elements developed on

the basis of Kirchhoff’s theory are inadequate for thick plate analysis, several quadrilateral Mindlin plate

bending elements are developed to study the behaviour of Mindlin plates. The results on plates with

varying boundary conditions, material properties and loading conditions are presented to illustrate the

usefulness of the proposed approach. The findings from the present study could be useful in many

practical situations.

B.Tech. Research Guided Topic IV: Analysis of plane frames and plates under dynamic loading

conditions using the finite element method

The objective of this thesis is to study the static/dynamic behaviour of plane frame and plate structures

under varying loading environment using the finite element method. A brief review of the current finite

elements for dynamic analyses of plane frames and plate structures is given. Parametric effects of length

to thickness ratio have been shown. The results presented in this investigation could be useful in better

34

understanding the dynamic behaviour of plane frames and plate structures under time dependent loading

conditions and potentially beneficial for designers of plane frames and plate structures.

B.Tech. Research Guided Topic V: Plasticity Analysis of Beams and Plane Frames Using the Finite

Element Method

The objective of this thesis is to study the plasticity behaviour of beams and plane frames under varying

loading environment and boundary conditions using developed plane frame elements. A brief review of

the current finite elements for plasticity analysis of beams and plane frames is given. Parametric effects of

beam and frame aspect ratio and length to thickness ratio have been shown. The results presented in this

investigation could be useful in better understanding the behaviour of beams and plane frames under

varying loading environments and boundary conditions for designers of the beam and frame structures.

B.Tech. Research Guided Topic VI: Static Analysis of Plane Elasticity Problems Using The Boundary

Element,. Element Free Galerkin and The Finite Element Method

The objective of this thesis is to study the elastic behaviour of plane elasticity problems using BEM, EFG

and FEM Techniques. A brief review of BEM, EFG and FEM Techniques for the elasticity analyses is

given. A range of problems has been solved to illustrate the approach. The results presented in this

investigation could be useful in better understanding the elastic behaviour of plane stress, plane strain and

axi-symmetric problems and potentially beneficial for designers of strategic structures.

Ajaya Kumar Nayak

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Statement of Teaching

My teaching interests are in the areas of mechanics, materials and structures. My teaching has focussed on

the following areas:

Mechanics, Finite element analysis, Numerical methods, Structural Integrity, Structures and materials,

Theory of plate structures, Structural analysis, Failure of materials, Materials and structural

engineering, Marine safety and environmental engineering.

I enjoy teaching of various courses with utmost interest and participate in the development of curriculum.

My goal of teaching is to explain the principles of mechanics, materials and structures in a simple and

well understood manner through examples.

Teaching 2006-Present The aims of the teaching have been to understand the principles of mechanics,

materials and structures.

Teaching I. Structural Integrity (Ship Science, School of Engineering Sciences, University of

Southampton,UK) Structural Integrity is a graduate course in Msc maritime Engineering. Fracture

mechanics approach which is a part of Structural Integrity course covers introduction to failure criteria

(yield criteria in steel without crack, brittle fracture of steel specimens, high cycle fatigue), Linear elastic

fracture mechanics approach (the Griffith criterion for elastic energy release rate, stresses at the crack tip),

Nonlinear elastic fracture mechanics approach and Case studies.

Teaching II. Marine Safety and Environmental Engineering (Ship Science, School of Engineering

Sciences, University of Southampton, UK) Marine safety and environmental engineering is a graduate

course in maritime engineering. Reliability and Risk based design course which is a part of Marine safety

and environmental engineering course covers reliablity (assessment of reliability, failure data collection,

confidence limits, characteristic values, statistical methods), Structural reliability (reliability methods

incorporating Level 1, 2 and 3, Monte-Carlo simulation, Hasoferlind, case studies, partial safety factors

and design code formats) and Risk based design (risk identification, risk estimation, risk evaluation, risk

index number, implied cost of averting a fatality, as low as reasonably practicable).

Teaching III. Finite Element Analysis and Optimization (General Electric Global Research,

Bangalore, India) Finite element analysis and optimization is a Master of Engineering course in Edison

Engineering Degree Program (EEDP) in General Electric. It covers engineering design problem, review

of elasticity equations, finite element analysis steps, development of methodologies for bar element,

principle of minimum potential energy, beam elements, two dimensional elements (plane stress, plane

strain), criteria for convergence, structural dynamics, Nonlinear problems (Geometric nonlinearity for

large deflections and large rotations, Material nonlinearity for plasticity, nonlinear elasticity, Contact

nonlinearity), Solution methods, Computer aided design (CAD), Analysis of results, advanced material

36

models, Example case studies, Optimization basics, variational problem, multi-criteria optimization,

gradient based optimization methods, Genetic algorithms.

Teaching IV. Mechanical Behavior of Materials (General Electric Global Research, Bangalore,

India) Mechanical behaviour of materials is a Master of Engineering course in Edison Engineering

Degree Program (EEDP) in General Electric. It covers introduction to materials

(application,design,material,cost,process,types of design,goals for evaluating mechanical behavior of

materials), principles of mechanics(concepts of stress and strain), material behavior (spectrum of

engineering materials), linear elasticity, plasticity, fracture mechanics, creep, visco-elasticity.

Teaching V. Advanced Reinforced Concrete Design (VSSUT, Burla India) Advanced reinforced

concrete design is a Master of Technology course in Structural Engineering (Civil Engineering) in

VSSUT, Burla. It covers design of reinforced concrete structures: methods of design, WSD and LSD,

review in brief of LSD-flexure, axial flexure, shear and tension, estimation of crack width, estimation of

deflection of reinforced concrete beams, analysis and design of building frames subjected to wind load,

earthquake and structural response, ductility of reinforced structures, material ductility-steel and concrete,

section ductility, member ductility, structural ductility, ductile detailing of r.c frames for seismic forces,

design of deep beams and design of concrete shear walls.

Teaching VI. Advanced Design of Steel Structures (VSSUT, Burla India) Advanced design of steel

structures is a Master of Technology course in Structural Engineering (Civil Engineering) in VSSUT,

Burla. It covers limit states design of steel members, uncertainties in load and resistance, limit states and

load and resistance factor design methods, stability criteria: stability of beams – local buckling of

compression flange & web, lateral-torsional buckling, stability of columns -slenderness ratio of columns,

local buckling of flanges and web, bracing of column about weak axis, method of design - allowable

stress design, plastic design, load and resistance factor design; strength criteria: beams –flexure, shear,

torsion, columns – moment magnification factor, effective length, P-M interaction, Bi-axial bending, joint

panel zones, Drift criteria: P-Ä effect, deformation-based design; connections: types – welded, bolted,

location – beam column, column-foundation, splices.

Teaching VII. Theory of Elasticity and Plasticity (VSSUT, Burla India) Theory of Elasticity and

Plasticity is a Master of Technology course in Structural and Geotechnical Engineering Streams (Civil

Engineering) in VSSUT, Burla. It covers linear elasticity; stress, strain, constitutive relations, strain

displacement relations, equilibrium and compatibility equations, stress and displacement functions, two

dimensional problems in cartesian and polar coordinates, description of an elasticity problem as a

boundary value problem, bending of beams- cantilever and simply supported beam, stress distribution for

axi-symmetric problems, pure bending of curved bars, effect of circular holes on stress distribution in

plates, stress and strain in three dimensions; principal stresses, maximum shearing stress, principal axes of

strain, stretching of prismatic bar by its own axis, elementary problems of elasticity in three dimension,

torsion of non-circular prismatic bars, Saint Venant’s theory, section ductility, various analogies, torsion

of hollow and thin section, application of energy methods, introduction to the theory of plasticity, the

37

yield criteria of metals, stress space representation of yield criteria, stress-strain relations plastic potential,

flow rules and maximum work hypothesis, two dimensional plastic flow problems, Incompressible two

dimensional flow, stresses in plastic materials in condition of plane strain, equation of equilibrium the

simplest slip-line fields.

Teaching VIII. Earthquake Analysis and Design (VSSUT, Burla India) Earthquake Analysis and

Design is a Master of Technology course in Structural and Geotechnical Engineering Streams (Civil

Engineering) in VSSUT, Burla. It covers characteristics of earthquakes; earthquake response of

structures, seismology, seismic risk and hazard, soil dynamics and seismic inputs to structures,

characterization of ground motion; lateral load calculation, base shear, earthquake intensity and

magnitude; recording instruments and base line correction, predominant period and amplification through

soil, response spectrum, analysis, spectral analysis, idealization of structural systems for low, medium and

high rise buildings, nonlinear and push over analysis, dynamic soil-structure interaction, earthquake

design philosophy, concept of earthquake resistant design; code provisions of design of buildings,

reinforcement detailing for members and joints, retrofitting and strengthening of structures, concept of

base isolation design and structural control.

Teaching IX. Advanced Structural Design (VSSUT, Burla India) Advanced Structural Design is a

Bachelor of Technology course in Civil Engineering in VSSUT, Burla. It covers building portals,

analysis of portal frames and design of rectangular portal frames.

Teaching X. Structural Design (VSSUT, Burla India) Structural Design is a Bachelor of Technology

course in Civil Engineering in VSSUT, Burla. It covers properties of concrete and reinforcing steel,

philosophy, concept and methods of reinforced concrete design, introduction to limit state method: limit

state of collapse and limit state of serviceability, application of limit state method to rectangular beams

for flexure, shear, bond and torsion. design of doubly reinforced beams, design of T-and L-beams, design

of one way and two way slabs, design of staircases, design of short and long columns with axial and

eccentric loading, design of isolated column footing, design principle of masonry structures: brick and

stone masonry, design of masonry short and long walls, design of columns and retaining walls.

Teaching XI. Steel Structures (VSSUT, Burla India) Steel Structures is a Bachelor of Technology

course in Civil Engineering in VSSUT, Burla. It covers philosophy, concept and methods of design of

steel structures, structural elements, structural steel sections, rivetted and welded connections, design of

tension members, design of compression members, design of columns, lacing and battening, Column

base and foundation. design of beams, plate girder and gantry girder and design of roof trusses.

Teaching XII. Structural Dynamics and Earthquake Engineering (VSSUT, Burla India) Structural

Dynamics and Earthquake Engineering is a Bachelor of Technology course in Civil Engineering in

VSSUT, Burla. It covers normal mode vibration of continuous beams, vibrating strings, longitudinal

vibration of rods, torsional vibration of rods, Euler equation of beams, effect of rotary inertia and shear

38

deformation, analysis of structural response to earthquake, seismological background and deterministic

analysis of earthquakes.

Teaching XIII. Structural Analysis II (VSSUT, Burla India) ) Structural Analysis II is a Bachelor of

Technology course in Civil Engineering in VSSUT, Burla. It covers introduction to force methods of

structural analysis, introduction to displacement methods of structural analysis, analysis of continuous

beam and plane frame by slope deflection method, analysis of continuous beam and plane frame by

moment distribution method, analysis of continuous beam and simple portals by Kani’s method, analysis

of two pinned and fixed arches with dead and live loads, suspension cable with two pinned stiffening

girders, plastic analysis: plastic modulus, shape factor, plastic moment of resistance, load factor, plastic

analysis of continuous beam and simple rectangular portals, application of upper and lower bound

theorems, matrix method of analysis, flexibility and stiffness method, application to simple trusses and

beam.

Teaching XIV. Civil Engineering Materials for Construction (VSSUT, Burla India) Civil

Engineering Materials for Construction is a Bachelor of Technology course in Civil Engineering in

VSSUT, Burla. It covers bricks: methods of bricks manufacture, testing of bricks, cement, classification,

chemical composition, hydration, tests for cement, concrete: composition, water- cement ratio,

workability, masonry arches: terms used types of arches, stability, line of thrust, depth of arch at the

crown, cavity walls: purpose, method of construction, stairs: terms used, types of stairs, essential

requirements, wooden stairs, concrete stairs, metal stairs, fire resistive construction: fire resistive

construction, fire resistance of common building materials, protection for girders and columns, fire

fighting appliances, plastering: materials for plastering, methods of plastering, defects in plastering and

remedy. damp prevention: causes, effects, different methods of prevention of dampness, types of doors

and windows, painting and decoration: oil painting and varnishing, enamel painting, washes and

distemper, defects in painting, glazing: varieties of glass, decorative glass, door and window glazing,

repair of building: annual and special repair of buildings, maintenance of buildings, types of cracks in

building, types of building joint, stone: Indian building stones, their properties and uses, methods of

querying, timer: preservation and seasoning of timber, foundation: brief idea on various types of

foundation.

Teaching XV. Concrete Structures II (VSSUT, Burla India) Concrete Structures II is a Bachelor of

Technology course in Civil Engineering in VSSUT, Burla. It covers introduction to earthquake

engineering; cyclic behavior of concrete and reinforcement, significance of ductility, ductility of beam,

design and detailing for ductility, simple problems based on above concept, computation of earthquake

forces on building frame using seismic coefficient method as per IS 1893-2002, combined footing:

design of rectangular and trapezoidal footing, design of raft foundation, retaining walls: forces acting on

retaining wall, stability requirement, design of cantilever and counterfort retaining walls, building portals:

analysis of portal frames, design of rectangular portal frames, design of water tanks: design requirements,

design of tanks on ground and underground.

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Teaching XVI. Theory of Elasticity and Plasticity (VSSUT, Burla India) Theory of Elasticity and

Plasticity is a Bachelor of Technology course in Civil Engineering in VSSUT, Burla. It covers plane

stress and plane strain problems. general stress and strain equations (equilibrium and compatibility

equations). two dimensional problems in rectangular coordinates. stress and strain components,

differential equation, equilibrium equations and compatibility equations in polar coordinate. stress

distribution for axisymmetric problems. pure bending of curved bars, thick walled cylinder. concentrated

force at a point of straight boundary. force acting on the end of a wedge. concentrated force acting on a

beam. effect of circular holes on stress distributions in plates. stress and strain in three dimensions:

principles stresses, maximum shearing stress, principal axes of strain. stretching of prismatical bar by its

own axis. elementary problems of elasticity in three dimension. torsion of non-circular prismatic bars.

Saint Venant’s theory. various analogies. torsion of hollow and thin section. application of energy

methods. introduction to the theory of plasticity., the yield criteria of metals, stress space representation of

yield criteria. stress-strain relations plastic potential, flow rules and maximum work hypothesis. two

dimensional plastic flow problems. incompressible two dimensional flow, stresses in plastic materials in

condition of plane strain, equation of equilibrium the simplest slip-line fields.

Teaching XVII. Structural Analysis (VSSUT, Burla) Structural Analysis is a Bachelor of Architecture

Course in Architecture in VSSUT, Burla. It covers Introduction to statically determinate/ indeterminate

structure with reference to 2D and 3D structures. Free body diagram of structure. Introduction to

kinematically determinate/indeterminate structures with reference to 2D and 3D structures. Degree of

freedom. B.M. and S.F. diagrams for different loading on simply supported beam, cantilever and

overhanging beams. B.M. shear and normal thrust of three hinged arches. Deflection of statically

determinate beams: Integration method, Moment area method, Conjugate beam method. Deflection of

statically determinate beams by energy methods- strain energy method, castiglianos theorems, reciprocal

theorem, unit load method. Deflection of pin-jointed trusses, Williot-Mohr diagram. B.M. and S.F.

diagrams for statically indeterminate beams – propped cantilever and fixed beams. Application of three

moment theorem to continuous and other indeterminate beams. ILD for determinate structures for

reactions at supports, S.F. at given section, B.M. at a given section, Maximum shear and maximum

bending moment at given section, Problems relating to series of wheel loads, UDL less than or greater

than the span of the beam, Absolute Maximum bending moment. ILD for B.M., S.F., normal thrust and

radial shear of a three hinged arch. Suspension cables, three hinged stiffening girders. Introduction to

space frames.

Teaching XVIII. Engineering Mechanics (VSSUT, Burla) Engineering Mechanics is a Bachelor of

Architecture Course in Architecture in VSSUT, Burla. It covers Rectilinear Translation: kinematics,

principles of dynamics, D’Alemberts principle, momentum and impulse, work and energy, impact,

Curvilinear translation, kinematics, equation of motion, projectile, D’Alemberts principle of curvilinear

motion.

Teaching XIX. Building Construction-I (VSSUT, Burla) Building Construction-I is a Bachelor of

Architecture Course in Architecture in VSSUT, Burla. It covers foundation – functions of foundations,

types of foundations, simple load bearing foundations in brick and stone; concrete blocks – hollow and

solid, stabilised mud blocks; timber work- simple carpentry joineries, different types of doors and

windows, fixing details of frame, style, rail, panel, glazing including fixtures and fastenings.

40

Teaching XX. Building Materials-II (VSSUT, Burla) Building Materials II is a Bachelor of

Architecture Course in Architecture in VSSUT, Burla. It covers varnishes, paints, distempers-

characteristics and process of varnishing, type and compositions of paints, types of painting system:

aluminium paints, cement-based paints, oil emulsion paints, enamel paints, their selection criteria; plastics

and polymers - types and use of plastic in building construction, properties of plastic; use of various

polymer materials in building industry, use of nano-paints; miscellaneous materials - glass, fibre glass,

cork, rubber, gypsum, sealants, asbestos, heat and sound insulating materials, their trade name and uses.

Innovations in Teaching:

In VSSUT, Burla I have evaluated students internally through adequate number of tests, quiz, home

assignments, viva and grand viva-voce. I have achieved 100 % pass results for both BTech and MTech

taught courses. I have developed course materials on MTech Structures Courses on Advanced Design of

Steel Structures, Structural Optimization and Theory of Elastic Stability for 2011-2012. I also developed a

New MTech Program on Industrial Safety Technology, for 2014-2015 with an eye on focussing safety

issues in public and private sector organisations. I also developed Optimisation syllabus for MTech

Program in Geotechnical Engineering. I have actively participated in the development of NBA documents

and I have developed MTech dual degree syllabus for structural engineering.

Taking into account Innovations in Teaching, I have prepared the lectures with care. Each lecture is

focussed on a theme and possible practical application areas. Delivery of lectures is more interactive for

better understanding of the concepts. Case studies are discussed to show the applicability of their

knowhow for live problems,

In the context of Innovations in Laboratory experiments, the experimental set up was thoroughly

examined before carrying out any experiment, Similar results from other sources are also studied. The

prototype problems are discussed vis-a-vis model studies. Interactive sessions are scheduled for better

understanding of the problem.

In Innovations in evaluation methods, answer sheets of question papers are prepared. Each answer sheet is

thoroughly checked. Students are shown answer sheets before publication of the results. The students

were explained about their performance and possible improvements.

In the context of Preparation of teaching materials, Text books, laboratory manuals etc. teaching materials

are prepared well in advance and Power-Point slides are presented to students on practical application

areas. Class notes are prepared carefully to meet the requirements.

Regarding Professional Organization of Teachers, I have taught to teachers of various institutions during

summer school on AICTE approved short term course on Design of steel structures using IS800:2007

from 18 June to 1 july 2012 on Design of Beams in VSSUT Burla.

I got my teaching and curricular programme evaluated by students which is very important for

innovations in my teaching methods.

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Course Evaluation on Grade Points of 5 (2011-2012) at VSSUT, Burla

Courses

(1)

Organization

(2)

Communication

(3)

Interaction

(4)

Satisfaction

on grades

(5)

Intellectual

Stimulation

(6)

Average

(cols 2 +

6)/5

SDEE (UG) 5 4.2 4.5 4.8 4.2 4.5

ARCD (PG) 4.8 4.8 5 4.8 4.6 4.8

Course Evaluation on Grade Points of 5 (2012-2013) at VSSUT, Burla

Courses

(1)

Organization

(2)

Communication

(3)

Interaction

(4)

Satisfaction

on grades

(5)

Intellectual

Stimulation

(6)

Average

(cols 2 +

6)/5

SD & SS

(UG)

5 4.2 4.5 4.8 4.2 4.5

ARCD &

ADSS (PG)

4.8 4.8 5 4.8 4.6 4.8

Course Evaluation on Grade Points of 5 (2014-2015) at VSSUT, Burla

Particulars SS

(UG)

CSII

(UG)

TEP

(PG)

Preparedness for the class 4.67 4.67 4.78

Organisation of the content 4.54 4.44 4.57

Clarity of delivery 4.07 4.22 4.57

Quality of board work 4.39 4.42 4.86

Student participation 4.04 4.02 4.43

Coverage of the syllabus 4.48 4.48 4.93

Input beyond text book 4.07 4.00 4.36

Quality of tutorial/home assignment 3.81 3.89 4.64

Punctuality in taking class 4.70 4.72 4.93

Availability for consultation 4.63 4.70 4.93

Average (rows 2 + 11)/10 4.34 4.36 4.70

Ajaya Kumar Nayak

42

New MTech Program on Industrial Safety Technology

I have developed syllabus for a New MTech in Industrial Safety Technology, Department of Civil Engineering,

VSSUT, Burla which has been passed in Board of Studies and Academic Council in 2013-2014 as below.

Sl No. Subject L-T-P Credits

I SEMESTER

1 Probability and Statistics 4-0-0 4

2 Safety Management 4-0-0 4

3 Occupational Health and Hygiene 4-0-0 4

4 Elective-I (Group A) 4-0-0 4

5 Elective-II (Group A) 4-0-0 4

6 Industrial Safety Technology Laboratory 0-0-4 4

7 Seminar – I 0-0-3 2

8 Comprehensive Viva Voce-I 2

TOTAL 20-0-07 28

II SEMESTER

1 Computer Aided Risk Analysis 4-0-0 4

2 Safety in Construction 4-0-0 4

3 Fire Engineering and Explosion

Control

4-0-0 4

4 Elective -III(Group B) 4-0-0 4

5 Elective- IV(Group B) 4-0-0 4

6 Field Visit 0-0-4 4

7 Seminar – II 0-0-3 2

8 Comprehensive Viva Voce-II 2

TOTAL 20-0-07 28

III SEMESTER

1 Dissertation interim evaluation 10

2 Comprehensive Viva 3

3 Seminar on Dissertation 2

TOTAL 15

IV SEMESTER

1 Dissertation Open Defence 5

2 Dissertation evaluation 20

TOTAL 25

Electives for I-Semester in Group-A Electives for II-Semester in Group-B

Regulation for Health, Safety and Environment

Environmental Pollution Control

Human Factors Engineering

Quality Engineering

Introduction to fire science and dynamics

Environmental impact and risk assessment

Optimization

Electrical Safety

Safety in Material Handling

Design of Air pollution control system

Industrial Noise and Vibration Control

Quantitative methods in fire safety engineering

Engineering Project Management

Earthquake analysis and design

Flood risk management

Safety in offshore structures

Machine Foundations

Ajaya Kumar Nayak

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Research Summary

My background and research interests are in the areas of manufacturing, experimental, analytical and

computational mechanics of materials and structures in strategic applications. My research has focused on

the following areas:

Finite Element Method, Analytical and Experimental Techniques, Composite Plates and Shells, System

Identification, Vibration Control, Stability of Structures, Impact Analysis, Damage Detection and

Structural Health Monitoring, Failure Analysis of Joints, Shape Memory Alloys, Piezo-electric

Composites, Functionally Graded Materials, Manufacturing and Process Modeling of Composite

Structures.

During my PhD, I have developed defect free finite element formulations based on a combination of the

three noded Discrete Kirchhoff theory (DKT) triangular plate bending element, the three noded constant

strain triangle (CST) and the six noded linear strain triangle (LST) to study damping response of

sandwich panels taking into account both frequency independent and frequency dependent damping of

viscoelastic materials. In order to study a wide range of problems, I have developed two new Co four and

nine node assumed strain finite element formulations of a refined third order theory which did not require

shear correction factors and analyzed isotropic, orthotropic, and layered anisotropic composite and

sandwich plates under free vibration, damping and transient loading conditions. Parametric effects of

plate aspect ratio, length to thickness ratio, degree of orthotropy, number of layers and lamination scheme

on the natural frequencies (free vibration), loss factors (damping) and dynamic (transient) responses were

investigated. The results presented in this investigation have been useful in better understanding the

behavior of sandwich laminates under dynamic conditions and are potentially beneficial for designers of

sandwich structures.

A significant focus of my research has been on the development of innovative manufacturing,

experimental, analytical and computational techniques to analyze and design materials and structures that

are used in various engineering applications. These experimental and numerical methods have been

validated against standard benchmark problems to ascertain their behavior in both static and dynamic

loading environments. Since defects in structures are predominant during manufacturing stages, a defect

methodology has been established to understand the behavior of structures in practice. Currently

manufacturing, experimental, analytical and computational techniques are being pursued to study the

reliability analysis of materials and structures.

Due to the high performance requirement in aircraft engine parts such as fan blade and fan case, the

composites must confirm to varying specifications. In order to manufacture defect free air worthy

components like fan containment cases, the manufacturing aspects are very important. Most recently

inline infusion has become a very cost effective approach in meeting the challenging needs of aerospace

industry. I have developed novel computational techniques to analyze through thickness infusion of resin

in composite parts for aircraft composite fan cases.

Ajaya Kumar Nayak

44

Proposed Research Plan

Composites are being increasingly considered for use in Energy efficient, Green and Sustainable

technologies such as Buildings, Bridges, Railway Tracks, Ship Structures, Underwater Turbines and

Offshore Wind Turbines among other applications. A brief outline of my research plan on such materials

and structures for above mentioned application areas is given below.

Topic 1: Composites Waviness and wrinkles sometimes occur in composite materials as a result of

improper lay up of the reinforcing yarns or layers, or from deformations of the reinforcement during de-

buckling or cure of the matrix. The thermal conductivities, thermal expansions and elastic constants of the

wrinkled regions can be significantly different from the corresponding properties of a composite with

straight reinforcements. I plan to carry out both the theory and experiment to understand the above

mentioned defect mechanics parameters on static and fatigue load carrying capacity of composites in

above mentioned applications. I plan to develop Non Destructive Evaluation (NDE) methods to detect

and characterize flaws and to determine the material properties of the test specimens. I plan to carry out

both computational and experimental approach to deal with NDE of composites with defects. This will be

achieved with application of low frequency vibration, ultrasonic, acoustic absorption, thermo-sonic and

acoustic emission methods to the characterization and integrity assessment of composite structures.

Topic 2: Structural Health Monitoring Renewed interest in the application of piezoelectric materials to

construct smart structures has led to extensive research efforts to fully characterize the sensory and active

behavior of these materials which needs the development of novel analytical, experimental and numerical

techniques. As a consequence of super-elastic and shape memory behavior, shape memory alloys lend

themselves to many innovative applications. I plan to carry out detailed experimental and theoretical

investigations to gain further insights into their super-elastic behavior. The gradual change of material

properties as a function of position along certain dimensions of the structure can be tailored to different

applications and working environments. Theoretical as well as experimental studies will be carried out to

assess the behavior of functionally graded materials in various conditions.

Topic 3: Processing The distinctive characteristic of composite processes to produce large composite

structures in above mentioned applications is that the material is engineered simultaneously with the final

part. Resin transfer molding allows the manufacture of high quality parts with a short process cycle and

thus has great potential for the structures. I plan to develop methodology for the physical phenomena

during processing like heat transfer, cure kinetics, resin flow, laminate compaction, residual stresses so as

to reduce the experiments. I would like to undertake both experimental and theoretical understanding of

resin flow in the laminate taking into account factors affecting in-plane infusion, through thickness

infusion, permeability, viscosity, contact angles, capillary pressure, compaction pressure, compressibility,

pressure, temperature, isothermal and varying viscosity parameters.

Ajaya Kumar Nayak