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Element Selection in Abaqus

6.12

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

Understand the distinguishing characteristics of the wide range of continuum and structural elements available

in Abaqus for stress analyses

Understand modeling features that may cause certain types of elements to behave poorly

Choose appropriate element types for different applications including the effects of fully or nearly

incompressible material behavior, contact, bending, etc.

Targeted audience

Simulation Analysts

Prerequisites This course is recommended for engineers with experience using Abaqus

About this Course

2 days

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Day 1

Lecture 1 Solid Elements in Abaqus

Lecture 2 Cylindrical and Infinite Elements

Lecture 3 Solid Element Integration, Hourglassing, and Incompressible Material Behavior

Demo 1 Hourglass control

Workshop 1 Plane Strain Elements

Lecture 4 Key Properties of Solid Elements

Workshop 2 Plane Stress Elements

Lecture 5 Modeling Bending and Stress Concentrations with Solid Elements

Workshop 3 3-D Solid Elements

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Day 2

Lecture 6 Structural Elements in Abaqus

Lecture 7 Conventional Shell Elements

Workshop 4 Shell Elements

Lecture 8 Continuum Shell Elements

Lecture 9 Beam and Frame Elements

Workshop 5 Beam Elements

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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, 2012.

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 6.12 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

Demo 1 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

L1.1

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The following topics are covered in this lesson.

Lesson content:

Solid Elements in Abaqus

Lesson 1: Solid Elements in Abaqus

90 minutes

L1.2

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Here are the steps to be followed:

Solid Elements in Abaqus

1. Introduction

2. Solid Elements in Abaqus

3. Planar Elements

4. Generalized Plane Strain Elements (S)

5. Axisymmetric Elements

6. Axisymmetric Elements with

Nonaxisymmetric Response (S)

7. Axisymmetric Elements with Twist (S)

8. Three-dimensional Elements

(S) Abaqus/Standard only

L2.1

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The following topics are covered in this lesson.

Lesson content:

Cylindrical and Infinite Elements

Lesson 2: Cylindrical and Infinite Elements

60 minutes

L2.2

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Here are the steps to be followed:

Cylindrical and Infinite Elements

1. Cylindrical Elements (S)

2. Infinite Elements

(S) Abaqus/Standard only

L3.1

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The following topics are covered in this lesson.

Lesson content:

Solid Element Integration, Hourglassing, and Incompressible Material Behavior

Workshop Preliminaries

Demonstration 1: Hourglass control

Workshop 1: Plane Strain Elements (IA)

Workshop 1: Plane Strain Elements (KW)

Lesson 3: Solid Element Integration, Hourglassing, and Incompressible Material Behavior

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:

Solid Element Integration, Hourglassing, and Incompressible Material Behavior

1. Numerical Integration

2. Hourglassing and Hourglass Control

3. Incompressible Material Behavior

4. The Approach

5. Hybrid (Mixed) Elements (S)

6. Demonstration

(S) Abaqus/Standard only

B

L4.1

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The following topics are covered in this lesson.

Lesson content:

Key Properties of Solid Elements

Workshop 2: Plane Stress Elements (IA)

Workshop 2: Plane Stress Elements (KW)

Lesson 4: Key Properties of Solid Elements

60 minutes

Both interactive (IA) and keywords (KW) versions

of the workshop are provided. Complete only one.

L4.2

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Here are the steps to be followed:

Key Properties of Solid Elements

1. Key Properties of First-Order Triangles and

Tetrahedra

2. Key Properties of Fully Integrated First-

Order Quads and Bricks

3. Key Properties of Reduced-Integration

First-Order Quads and Bricks

4. Key Properties of Second-Order Triangles

and Tetrahedra

5. Key Properties of Fully Integrated Second-

Order Quads and Bricks (S)

6. Key Properties of Reduced-Integration

Second-Order Quads and Bricks (S)

7. Using Second-Order Bricks in Contact

Problems (S)

8. Quads/Bricks or Triangles/Tetrahedra?

9. First- or Second-Order Elements?

(S) Abaqus/Standard only

L5.1

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The following topics are covered in this lesson.

Lesson content:

Modeling Bending and Stress Concentrations with Solid Elements

Workshop 3: 3-D Solid Elements (IA)

Workshop 3: 3-D Solid Elements (KW)

Lesson 5: Modeling Bending and Stress Concentrations with Solid Elements

60 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:

Modeling Bending and Stress Concentrations with Solid Elements

1. Bending Problems and Shear Locking

2. Incompatible Mode Elements

3. Summary: Modeling Bending Using

Continuum Elements

4. Stress Concentrations

5. Second-order Accuracy (E)

6. Solid Element Selection Summary

7. Abaqus/Standard vs. Abaqus/Explicit

8. Continuum vs. Structural Elements

(E) Abaqus/Explicit only

L6.1

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The following topics are covered in this lesson.

Lesson content:

Structural Elements in Abaqus

Lesson 6: Structural Elements in Abaqus

60 minutes

L6.2

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Here are the steps to be followed:

Structural Elements in Abaqus

1. Overview

2. Introduction

3. Structural Elements in Abaqus

4. Classical Formulation of Thin Shells

and Slender Beams (S)

5. Shear Flexible Formulation of Shells

and Beams

6. Thickness Changes

7. Mode-based and Implicit Dynamics (S)

(S) Abaqus/Standard only

L7.1

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The following topics are covered in this lesson.

Lesson content:

Conventional Shell Elements

Workshop 4: Shell Elements (IA)

Workshop 4: Shell Elements (KW)

Lesson 7: Conventional Shell Elements

2 hours

Both interactive (IA) and keywords (KW) versions

of the workshop are provided. Complete only one.

L7.2

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Here are the steps to be followed:

Conventional Shell Elements

1. Conventional vs. Continuum Shell

Elements

2. Defining Conventional Shells

3. Conventional Shell Element Behavior

4. Conventional shell Element Types

5. Comparison Studies

6. Axisymmetric shell elements

7. Viewing Shell Element Output

L8.1

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The following topics are covered in this lesson.

Lesson content:

Continuum Shell Elements

Lesson 8: Continuum Shell Elements

60 minutes

L8.2

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Here are the steps to be followed:

Continuum Shell Elements

1. Introduction to Continuum Shell

Elements

2. Defining the Thickness Direction for

Continuum Shell Elements

3. Continuum Shell Modeling

4. Continuum Shell Example

5. Shell Element Selection Summary

6. Abaqus/CAE Demonstration:

Controlling the Mesh Stack Direction

L9.1

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The following topics are covered in this lesson.

Lesson content:

Beam and Frame Elements

Workshop 5: Beam Elements (IA)

Workshop 5: Beam Elements (KW)

Lesson 9: Beam and Frame Elements

2 hours

Both interactive (IA) and keywords (KW) versions

of the workshop are provided. Complete only one.

L9.2

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Here are the steps to be followed:

Beam and Frame Elements

1. Beam Elements

2. Defining Beam Elements

3. Viewing Beam Element Output

4. Meshed Beam Cross Sections (S)

5. Beam Element Selection Summary

6. Frame Elements (S)

(S) Abaqus/Standard only