Finite Element Simulations with ANSYS Workbench 14Theory, Applications, Case Studies

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Huei-Huang Lee

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Schroff Development Corporation

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Preface 4

Chapter 1 Introduction 9

1.1� Case Study: Pneumatically Actuated PDMS Fingers 101.2� Structural Mechanics: A Quick Review 231.3� Finite Element Methods: A Conceptual Introduction 321.4� Failure Criteria of Materials 371.5� Review 44Appendix: An Unof�cial History of ANSYS 48

Chapter 2 Sketching 53

2.1� Step-by-Step: W16x50 Beam 542.2� Step-by-Step: Triangular Plate 652.3� More Details 762.4� More Exercise: M20x2.5 Threaded Bolt 872.5� More Exercise: Spur Gears 912.6� More Exercise: Microgripper 972.7� Review 101

Chapter 3 2D Simulations 103

3.1� Step-by-Step: Triangular Plate 1043.2� Step-by-Step: Threaded Bolt-and-Nut 1173.3� More Details 1313.4� More Exercise: Spur Gears 1423.5� More Exercise: Filleted Bar 1483.6� Review 161�Chapter 4 3D Solid Modeling 163

4.1� Step-by-Step: Beam Bracket 1644.2� Step-by-Step: Cover of Pressure Cylinder 1704.3� Step-by-Step: Lifting Fork 1814.4� More Details 1884.5� More Exercise: LCD Display Support 1944.6� Review 198

Chapter 5 3D Simulations 200

5.1� Step-by-Step: Beam Bracket 2015.2� Step-by-Step: Cover of Pressure Cylinder 2105.3� More Details 2185.4� More Exercise: LCD Display Support 2225.5� Review 227

� � Contents� 1

Contents

Chapter 6 Surface Models 229

6.1� Step-by-Step: Bellows Joints 2306.2� Step-by-Step: Beam Bracket 2406.3� More Exercise: Gearbox 2476.4� Review 260

Chapter 7 Line Models 262

7.1� Step-by-Step: Flexible Gripper 2637.2� Step-by-Step: 3D Truss 2747.3� More Exercise: Two-Story Building 2867.4� Review 300

Chapter 8 Optimization 302

8.1� Step-by-Step: Flexible Gripper 3038.2� More Exercise: Triangular Plate 3178.3� Review 325

Chapter 9 Meshing 327

9.1� Step-by-Step: Pneumatic Fingers 3289.2� More Exercise: Cover of Pressure Cylinder 3439.3� More Exercise: Convergence Study of 3D Solid Elements 3499.4� Review 361

Chapter 10 Buckling and Stress Stiffening 363

10.1� Step-by-Step: Stress Stiffening 36410.2� Step-by-Step: 3D Truss 37510.3� More Exercise: Beam Bracket 37910.4� Review 383

Chapter 11 Modal Analyses 385

11.1� Step-by-Step: Gearbox 38611.2� Step-by-Step: Two-Story Building 39111.3� More Exercise: Compact Disk 39811.4� More Exercise: Guitar String 40611.5� Review 413

Chapter 12 Structural Dynamics 41512.1� Basics of Structural Dynamics 41612.2� Step-by-Step: Lifting Fork 42512.3� Step-by-Step: Two-Story Building 43712.4 �More Exercise: Disk and Block 44412.5 �More Exercise: Guitar String 45212.6 �Review 462

2� Contents

Chapter 13 Nonlinear Simulations 46413.1� Basics of Nonlinear Simulations 46513.2� Step-by-Step: Translational Joint 47613.3� Step-by-Step: Microgripper 49013.4� More Exercise: Snap Lock 50313.5� Review 518

Chapter 14 Nonlinear Materials 52014.1� Basics of Nonlinear Materials 52114.2� Step-by-Step: Belleville Washer 53014.3� Step-by-Step: Planar Seal 54814.4� Review 562

Chapter 15 Explicit Dynamics 56415.1� Basics of Explicit Dynamics 56515.2� Step-by-Step: High-Speed Impact 57115.3� Step-by-Step: Drop Test 58115.4� Review 592

Index 594

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