Explicit Contents Lecture
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Transcript of Explicit Contents Lecture
Abaqus/Explicit: Advanced Topics
2
Abaqus/Explicit: Advanced Topics
Day 1
• Lecture 1 Overview of Abaqus/Explicit
• Workshop 1 Conditional Stability of Abaqus/Explicit
• Lecture 2 Elements
• Lecture 3 Contact Modeling
• Workshop 2 Impact of a Dodge Caravan Bumper Against a Rigid
Barrier
• Lecture 4 Quasi-Static Analyses
3
Abaqus/Explicit: Advanced Topics
Day 2
• Lecture 5 Adaptive Meshing and Distortion Control
• Workshop 3 Quasi-static Analysis of a Rubber Bushing
• Lecture 6 Constraints and Connections
• Lecture 7 Impact and Postbuckling Analyses
• Workshop 4 Crushing of a Tube
• Lecture 8 Material Damage and Failure
4
Abaqus/Explicit: Advanced Topics
Day 3
• Lecture 9 Managing Large Models: Part 1
• Lecture 10 Managing Large Models: Part 2
• Lecture 11 Output Filtering
• Lecture 12 Importing and Transferring Results
• Workshop 5 Bird Strike Simulation
5
Abaqus/Explicit: Advanced Topics
Additional Material
• Appendix 1 Explicit Dynamics Algorithm
• Appendix 2 Features of General Contact and Contact Pairs
• Appendix 3 Advanced Adaptive Meshing
• Appendix 4 VUMAT
• Appendix 5 Abaqus/Standard to Abaqus/Explicit
Co-simulation
• Workshop 6 Beam Impact Co-simulation
6
Abaqus/Explicit: Advanced Topics
Legal Notices
The Abaqus Software described in this documentation is available only under license from Dassault
Systèmes and its subsidiary and may be used or reproduced only in accordance with the terms of
such license.
This documentation and the software described in this documentation are subject to change without
prior notice.
Dassault Systèmes and its subsidiaries shall not be responsible for the consequences of any errors or
omissions that may appear in this documentation.
No part of this documentation may be reproduced or distributed in any form without prior written
permission of Dassault Systèmes or its subsidiary.
© Dassault Systèmes, 2010.
Printed in the United States of America
Abaqus, the 3DS logo, SIMULIA and CATIA are trademarks or registered trademarks of Dassault
Systèmes or its subsidiaries in the US and/or other countries.
Other company, product, and service names may be trademarks or service marks of their respective
owners. For additional information concerning trademarks, copyrights, and licenses, see the Legal
Notices in the Abaqus 6.10 Release Notes and the notices at:
http://www.simulia.com/products/products_legal.html.
7
Abaqus/Explicit: Advanced Topics
Revision Status
Lecture 1 6/10 Updated for 6.10
Lecture 2 6/10 Updated for 6.10
Lecture 3 6/10 Updated for 6.10
Lecture 4 6/10 Updated for 6.10
Lecture 5 6/10 Updated for 6.10
Lecture 6 6/10 Updated for 6.10
Lecture 7 6/10 Updated for 6.10
Lecture 8 6/10 Updated for 6.10
Lecture 9 6/10 Updated for 6.10
Lecture 10 6/10 Updated for 6.10
Lecture 11 6/10 Updated for 6.10
Lecture 12 6/10 Updated for 6.10
Workshop 1 6/10 Updated for 6.10
Workshop 2 6/10 Updated for 6.10
Workshop 3 6/10 Updated for 6.10
Workshop 4 6/10 Updated for 6.10
Workshop 5 6/10 Updated for 6.10
Workshop 6 6/10 Updated for 6.10
Appendix 1 6/10 Updated for 6.10
Appendix 2 6/10 Updated for 6.10
Appendix 3 6/10 Updated for 6.10
Appendix 4 6/10 Updated for 6.10
Appendix 5 6/10 Updated for 6.10
Overview of Abaqus/Explicit
Lecture 1
L1.2
Abaqus/Explicit: Advanced Topics
Overview of Abaqus/Explicit
• What is Explicit Dynamics?
• Abaqus/Explicit vs. Abaqus/Standard
• Some Challenging Problems
• Defining an Abaqus/Explicit Procedure
• Stable Time Increment
• Bulk Viscosity Damping
• Energy Balance
• Monitoring Diagnostic Messages
• Output
Elements
Lecture 2
L2.2
Abaqus/Explicit: Advanced Topics
Overview
• Introduction
• Element Types Overview
• Hourglassing and Locking
• Second-order Accuracy
Contact Modeling
Lecture 3
L3.2
Abaqus/Explicit: Advanced Topics
Overview
• Contact in Abaqus/Explicit
• Defining General Contact
• General Contact Output
• Limitations of General Contact
Quasi-Static Analyses
Lecture 4
L4.2
Abaqus/Explicit: Advanced Topics
Overview
• Introduction
• Quasi-Static Simulations Using Explicit Dynamics
• Loading Rates
• Energy Balance in Quasi-Static Analyses
• Mass Scaling
• Viscous Pressure
• Summary
Adaptive Meshing and Distortion Control
Lecture 5
L5.2
Abaqus/Explicit: Advanced Topics
Overview
• Lagrangian and Eulerian Descriptions
• Arbitrary Lagrangian-Eulerian (ALE) Method
• Lagrangian Adaptive Mesh Domains
• Element Distortion Control
Constraints and Connections
Lecture 6
L6.2
Abaqus/Explicit: Advanced Topics
Overview
• Introduction
• Surface-Based Coupling Constraints
• Connector Elements
• Surface-Based Ties
• Mesh-Independent Fasteners
• Cohesive Connections
• Virtual Crack Closure Technique
• Tips
Impact and Postbuckling Analyses
Lecture 7
L7.2
Abaqus/Explicit: Advanced Topics
Overview
• Impact Analysis
• Geometric Imperfections for Postbuckling Analyses
Material Damage and Failure
Lecture 8
L8.2
Abaqus/Explicit: Advanced Topics
Overview
• Progressive Damage and Failure
• Damage Initiation
• Damage Evolution
• Element Removal
• Failure in Fasteners
Managing Large Models: Part 1
Lecture 9
L9.2
Abaqus/Explicit: Advanced Topics
Overview
• Introduction
• Simplifying the Model
• Parallel Execution
• Techniques for Reducing CPU Time
• Tips
Managing Large Models: Part 2
Lecture 10
L10.2
Abaqus/Explicit: Advanced Topics
Overview
• Submodeling
• Restart
• Parts and Assemblies
Output Filtering
Lecture 11
L11.2
Abaqus/Explicit: Advanced Topics
Overview
• Introduction
• What is aliasing?
• Preventing aliasing
• Abaqus/Viewer postprocessing filters
• Filter options
• Filter distortions
• References
Importing and Transferring Results
Lecture 12
L12.2
Abaqus/Explicit: Advanced Topics
Overview
• Introduction
• Import from Abaqus/Explicit to Abaqus/Standard
• Import from Abaqus/Standard to Abaqus/Explicit
• Additional Import Modeling Issues
• Limitations
• Import from Abaqus/Explicit to Abaqus/Explicit
• Demonstration
Explicit Dynamics Algorithm
Appendix 1
A1.2
Abaqus/Explicit: Advanced Topics
Overview
• Explicit Dynamics Algorithm
Features of General Contact
and Contact Pairs
Appendix 2
A2.2
Abaqus/Explicit: Advanced Topics
Overview
• Features of General Contact
• Contact Pairs
Advanced Adaptive Meshing
Appendix 3
LA3.2
Abaqus/Explicit: Advanced Topics
Overview
• Eulerian Adaptive Mesh Domains for Steady-State Analyses
• Adaptive Meshing Output and Diagnostics
• Additional Features of Adaptive Meshing
Writing a VUMAT
Appendix 4
A4.2
Abaqus/Explicit: Advanced Topics
Overview
• Introduction
• Motivation
• Steps Required in Writing a VUMAT
• VUMAT Interface
• Example: VUMAT for Kinematic Hardening Plasticity
Abaqus/Standard to Abaqus/Explicit
Co-simulation
Appendix 5
A5.2
Abaqus/Explicit: Advanced Topics
Overview
• Introduction
• Examples
• Co-simulation modeling
• Postprocessing
• Substructuring
• Technology notes