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    Abaqus/Explicit: Advanced Topics

    6.12

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    Course objectives Upon completion of this course you will be able to:

    Use the explicit dynamics method effectively, including the application of general contact, mass scaling, and

    adaptive remeshing

    Use Abaqus/Explicit and Abaqus/Standard together to solve difficult problems, including results transfer and

    co-simulation

    Model high-strain-rate deformation and failure

    Filter output

    Targeted audience

    Simulation Analysts

    Prerequisites This course is recommended for engineers with experience using Abaqus

    About this Course

    3 days

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    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

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    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

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    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

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    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

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    Legal Notices

    The Abaqus Software described in this documentation is available only under license from Dassault

    Systmes 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 Systmes 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 Systmes or its subsidiary.

    Dassault Systmes, 2012.

    Printed in the United States of America

    Abaqus, the 3DS logo, SIMULIA and CATIA are trademarks or registered trademarks of Dassault

    Systmes 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 6.12 Release Notes and the notices at:

    http://www.3ds.com/products/simulia/portfolio/product-os-commercial-programs.

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    Revision Status

    Lecture 1 5/12 Updated for 6.12

    Lecture 2 5/12 Updated for 6.12

    Lecture 3 5/12 Updated for 6.12

    Lecture 4 5/12 Updated for 6.12

    Lecture 5 5/12 Updated for 6.12

    Lecture 6 5/12 Updated for 6.12

    Lecture 7 5/12 Updated for 6.12

    Lecture 8 5/12 Updated for 6.12

    Lecture 9 5/12 Updated for 6.12

    Lecture 10 5/12 Updated for 6.12

    Lecture 11 5/12 Updated for 6.12

    Lecture 12 5/12 Updated for 6.12

    Appendix 1 5/12 Updated for 6.12

    Appendix 2 5/12 Updated for 6.12

    Appendix 3 5/12 Updated for 6.12

    Appendix 4 5/12 Updated for 6.12

    Appendix 5 5/12 Updated for 6.12

    Workshop 1 5/12 Updated for 6.12

    Workshop 2 5/12 Updated for 6.12

    Workshop 3 5/12 Updated for 6.12

    Workshop 4 5/12 Updated for 6.12

    Workshop 5 5/12 Updated for 6.12

    Workshop 6 5/12 Updated for 6.12

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    The following topics are covered in this lesson.

    Lesson content:

    Overview of Abaqus/Explicit

    Workshop Preliminaries

    Workshop 1: Conditional Stability of Abaqus/Explicit (IA)

    Workshop 1: Conditional Stability of Abaqus/Explicit (KW)

    Lesson 1: Overview of Abaqus/Explicit

    2 hours

    Both interactive (IA) and keywords (KW) versions

    of the workshop are provided. Complete only one.

    L1.2

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    Here are the steps to be followed:

    Overview of Abaqus/Explicit

    1. What is Explicit Dynamics?

    2. Abaqus/Explicit vs. Abaqus/Standard

    3. Some Challenging Problems

    4. Defining an Abaqus/Explicit Procedure

    5. Stable Time Increment

    6. Bulk Viscosity Damping

    7. Energy Balance

    8. Monitoring Diagnostic Messages

    9. Output

  • L2.1

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    The following topics are covered in this lesson.

    Lesson content:

    Elements

    Lesson 2: Elements

    1 hour

    L2.2

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    Here are the steps to be followed:

    Elements

    1. Introduction

    2. Element Types Overview

    3. Hourglassing and Locking

    4. Second-order Accuracy

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    The following topics are covered in this lesson.

    Lesson content:

    Contact Modeling

    Workshop 2: Impact of a Dodge Caravan Bumper Against a Rigid Barrier (IA)

    Workshop 2: Impact of a Dodge Caravan Bumper Against a Rigid Barrier (KW)

    Lesson 3: Contact Modeling

    90 minutes

    Both interactive (IA) and keywords (KW) versions

    of the workshop are provided. Complete only one.

    L3.2

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    Here are the steps to be followed:

    Contact Modeling

    1. Contact in Abaqus/Explicit

    2. Defining General Contact

    3. General Contact Output

    4. Limitations of General Contact

  • L4.1

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    The following topics are covered in this lesson.

    Lesson content:

    Quasi-Static Analyses

    Lesson 4: Quasi-Static Analyses

    90 minutes

    L4.2

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    Here are the steps to be followed:

    Quasi-Static Analyses

    1. Introduction

    2. Quasi-Static Simulations Using Explicit

    Dynamics

    3. Loading Rates

    4. Energy Balance in Quasi-Static

    Analyses

    5. Mass Scaling

    6. Viscous Pressure

    7. Summary

  • L5.1

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    The following topics are covered in this lesson.

    Lesson content:

    Adaptive Meshing and Distortion Control

    Workshop 3: Quasi-static Analysis of a Rubber Bushing (IA)

    Workshop 3: Quasi-static Analysis of a Rubber Bushing (KW)

    Lesson 5: Adaptive Meshing and Distortion Control

    90 minutes

    Both interactive (IA) and keywords (KW) versions

    of the workshop are provided. Complete only one.

    L5.2

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    Here are the steps to be followed:

    Adaptive Meshing and Distortion Control

    1. Lagrangian and Eulerian Descriptions

    2. Arbitrary Lagrangian-Eulerian (ALE)

    Method

    3. Lagrangian Adaptive Mesh Domains

    4. Element Distortion Control

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    The following topics are covered in this lesson.

    Lesson content:

    Constraints and Connections

    Lesson 6: Constraints and Connections

    2 hours

    L6.2

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    Here are the steps to be followed:

    Constraints and Connections

    1. Introduction

    2. Surface-Based Coupling Constraints

    3. Connector Elements

    4. Surface-Based Ties

    5. Mesh-Independent Fasteners

    6. Cohesive Connections

    7. Virtual Crack Closure Technique

    8. Tips

  • L

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