Nonlinear and Impact Analyses of Composite Structures via ... · structures via various FE models,...
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Project website : www.iconic-itn.eu Group website: www.mul2.com Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129, Torino, Italy Email : [email protected] Global-Local approach for computationally efficient high-fidelity modelling ❑ Two-step finite element analysis: Coarse global analysis (in ABAQUS) and refined local analysis (in CUF) ❑ High-fidelity modelling of local region via CUF ❑ Global displacements applied as boundary conditions for the local analysis ❑ Mesh compatibility not required: Linear interpolation of global displacements Efficiency: 14x reduction in DOF 2x reduction in total wall time [1] M. Petrolo, M.H. Nagaraj, I. Kaleel, and E. Carrera, A global-local approach for the elastoplastic analysis of compact and thin-walled structures via refined models, Computers & Structures 206 (2018) 54-65 [2] A.G. de Miguel, I. Kaleel, M.H. Nagaraj, A. Pagani, M. Petrolo, and E. Carrera, Accurate evaluation of failure indices of composite layered structures via various FE models, Composites Science and Technology 167 (2018) 174-189 Publications This research work has been carried out within the project ICONIC (Improving the crashworthiness of composite transportation structures), funded by the European Union Horizon 2020 Research and Innovation program under the Marie Sklodowska-Curie grant agreement No.721256. Acknowledgment AIM: Development of high-fidelity component-wise models based on advanced structural theories to improve the prediction capabilities of finite elements in impact analyses of composites Overview ❑ Implementation of a global-local framework for computationally efficient analyses, and coupling of the MUL 2 code with commercial software ❑ Inclusion of nonlinear and multiscale capabilities, and implementation of damage modelling Nonlinear and Impact Analyses of Composite Structures via Unified Formulation Manish Hassan Nagaraj Ph.D. student in Mechanical Engineering (33 rd cycle), Marie Curie Early Stage Researcher Supervisors: Prof. Erasmo Carrera 1 , Dr. Marco Petrolo 1 , Prof. Brian Falzon 2 1 Dept. of Mechanical and Aerospace Engineering, Politecnico di Torino, Italy 2 School of Mechanical and Aerospace Engineering, Queen’s University Belfast, UK ❑ Development of explicit methods for nonlinear dynamics ❑ Numerical assessments considering strain rate effects Nonlinear global-local analysis by interfacing CUF with ABAQUS [1] Modelling of contact in CUF Elastoplastic indentation analysis in CUF Contact between plate and spherical indenter ❑ Node-to-Node contact modelling using refined beam theories via Component-Wise analysis ❑ Implicit analysis via a full Newton scheme ❑ Coupled nonlinearities in CUF (contact between elasto-plastic bodies) Methodology – Carrera Unified Formulation ❑ A hierarchical formulation to generate refined structural theory through variables kinematic description ,, = , ❑ CUF 1D models are able to generate accurate 3D finite element like solution at reduced computational cost Capabilities of CUF: ❑ Component-Wise Analysis ❑ Implicit Non-Linear Framework ❑ Parallel Multiscale Framework ❑ Explicit Nonlinear Dynamics (current development) ❑ Contact Mechanics Refined 1D CUF models Evaluation of Failure Indices and Free-Edge Effects ❑ Accurate evaluation of failure indices based on linear stress analysis in CUF ❑ Useful design parameter for design of composite structures Failure index – Matrix tension (Hashin-3D) [2] Efficiency: 16x reduction in DOF 8x reduction in total wall time 3-point bending test Current and Future Perspectives Current Work: ❑ Implementation of intralaminar ply-level damage models ❑ Development of explicit schemes for non- linear dynamics within the framework of CUF Future Work: ❑ Implementation of surface-based contact models for a better description of contact interactions ❑ Extension of CUF to impact analysis of composite structures Equivalent plastic strains Efficiency: 14x reduction in DOF 2x reduction in total wall time
Transcript of Nonlinear and Impact Analyses of Composite Structures via ... · structures via various FE models,...
Project website : www.iconic-itn.eu
Group website: www.mul2.com
Department of Mechanical and Aerospace Engineering, Politecnico di Torino,
Corso Duca degli Abruzzi, 24, 10129, Torino, Italy
Email : [email protected]
Global-Local approach for computationally efficient high-fidelity modelling
❑ Two-step finite element analysis: Coarse global analysis
(in ABAQUS) and refined local analysis (in CUF)
❑ High-fidelity modelling of local region via CUF
❑Global displacements applied as boundary conditions for
the local analysis
❑Mesh compatibility not required: Linear interpolation of
global displacements
Efficiency:
14x reduction in DOF
2x reduction in total wall time
[1] M. Petrolo, M.H. Nagaraj, I. Kaleel, and E. Carrera, A global-local approach for the elastoplastic analysis of compact and thin-walled
structures via refined models, Computers & Structures 206 (2018) 54-65
[2] A.G. de Miguel, I. Kaleel, M.H. Nagaraj, A. Pagani, M. Petrolo, and E. Carrera, Accurate evaluation of failure indices of composite layered
structures via various FE models, Composites Science and Technology 167 (2018) 174-189
Publications
This research work has been carried out within the project ICONIC (Improving the crashworthiness of composite transportation structures), funded by the
European Union Horizon 2020 Research and Innovation program under the Marie Sklodowska-Curie grant agreement No.721256.
Acknowledgment
AIM: Development of high-fidelity component-wise models based on advanced structural theories to improve the prediction capabilities of
finite elements in impact analyses of composites
Overview
❑Implementation of a global-local framework for computationally efficient
analyses, and coupling of the MUL2 code with commercial software
❑Inclusion of nonlinear and multiscale capabilities, and implementation of
damage modelling
Nonlinear and Impact Analyses of Composite Structures
via Unified FormulationManish Hassan Nagaraj
Ph.D. student in Mechanical Engineering (33rd cycle), Marie Curie Early Stage Researcher
Supervisors: Prof. Erasmo Carrera1, Dr. Marco Petrolo1, Prof. Brian Falzon2
1 Dept. of Mechanical and Aerospace Engineering, Politecnico di Torino, Italy2 School of Mechanical and Aerospace Engineering, Queen’s University Belfast, UK
❑Development of explicit methods for nonlinear dynamics
❑Numerical assessments considering strain rate effects
Nonlinear global-local analysis by interfacing CUF with ABAQUS [1]
Modelling of contact in CUF
Elastoplastic indentation analysis in CUF
Contact between plate and spherical indenter
❑ Node-to-Node contact modelling using refined beam
theories via Component-Wise analysis
❑ Implicit analysis via a full Newton scheme
❑ Coupled nonlinearities in CUF (contact between
elasto-plastic bodies)
Methodology – Carrera Unified Formulation
❑ A hierarchical formulation to generate refined structural theory through
variables kinematic description
𝒖 𝑥, 𝑦, 𝑧 = 𝑵𝑖 𝑦 𝐹𝜏 𝑥, 𝑧 𝒖𝜏𝑖❑ CUF 1D models are able to generate accurate 3D finite element like
solution at reduced computational cost
Capabilities of CUF:
❑ Component-Wise Analysis
❑ Implicit Non-Linear Framework
❑ Parallel Multiscale Framework
❑ Explicit Nonlinear Dynamics
(current development)
❑ Contact Mechanics
Refined 1D CUF models
Evaluation of Failure Indices and Free-Edge Effects
❑ Accurate evaluation of failure indices based
on linear stress analysis in CUF
❑ Useful design parameter for design of
composite structures
Failure index – Matrix tension (Hashin-3D) [2]
Efficiency:
16x reduction in DOF
8x reduction in total wall time
3-point bending test
Current and Future Perspectives
Current Work:
❑ Implementation of intralaminar ply-level
damage models
❑Development of explicit schemes for non-
linear dynamics within the framework of CUF
Future Work:
❑ Implementation of surface-based contact
models for a better description of contact
interactions
❑Extension of CUF to impact analysis of
composite structures
Equivalent plastic strains
Efficiency:
14x reduction in DOF
2x reduction in total wall time
