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Finite Element Sim

ulations with A

NSYS W

orkbench 2019Theory, Applications, Case Studies

Finite Element Simulationswith ANSYS Workbench 2019Theory, Applications, Case Studies

Huei-Huang Lee

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Contents

� Contents� 1

Preface 4

Chapter 1 Introduction 9

1.1� Case Study: Pneumatically Actuated PDMS Fingers 101.2� Structural Mechanics: A Quick Review 241.3� Finite Element Methods: A Concise Introduction 351.4� Failure Criteria of Materials 401.5� Review 471.6� Appendix: An Unofficial History of ANSYS 51

Chapter 2 Sketching 56

2.1� W16x50 Beam 572.2� Triangular Plate 702.3� More Details 812.4� M20x2.5 Threaded Bolt 922.5� Spur Gears 972.6� Microgripper 1032.7� Review 107

Chapter 3 2D Simulations 109

3.1� Triangular Plate 1103.2� Threaded Bolt-and-Nut 1253.3� More Details 1403.4� Spur Gears 1513.5� Structural Error, FE Convergence, and Stress Singularity 1573.6� Review 170

Chapter 4 3D Solid Modeling 172

4.1� Beam Bracket 1734.2� Cover of Pressure Cylinder 1794.3� Lifting Fork 1904.4� More Details 1974.5� LCD Display Support 2034.6� Review 207

� Contents� 2

Chapter 5 3D Simulations 209

5.1� Beam Bracket 2105.2� Cover of Pressure Cylinder 2195.3� More Details 2275.4� LCD Display Support 2315.5� Review 236

Chapter 6 Surface Models 238

6.1� Bellows Joints 2396.2� Beam Bracket 2496.3� Gearbox 2566.4� Review 269

Chapter 7 Line Models 271

7.1� Flexible Gripper 2727.2� 3D Truss 2837.3� Two-Story Building 2957.4� Review 309

Chapter 8 Optimization 311

8.1� Flexible Gripper 3128.2� Triangular Plate 3238.3� Review 329

Chapter 9 Meshing 330

9.1� Pneumatic Fingers 3319.2� Cover of Pressure Cylinder 3469.3� Convergence Study of 3D Solid Elements 3539.4� Review 365

Chapter 10 Buckling and Stress Stiffening 367

10.1� Stress Stiffening 36810.2� 3D Truss 37910.3� Beam Bracket 38310.4� Review 387

Chapter 11 Modal Analysis 389

11.1� Gearbox 39011.2� Two-Story Building 39511.3� Compact Disk 40211.4� Guitar String 41011.5� Review 417

2� Contents

� Contents� 3

Chapter 12 Transient Structural Simulations 419

12.1� Basics of Structural Dynamics 42012.2� Lifting Fork 42912.3� Harmonic Response Analysis: Two-Story Building 44112.4 � Disk and Block 44812.5 � Guitar String 45612.6 � Review 466

Chapter 13 Nonlinear Simulations 468

13.1� Basics of Nonlinear Simulations 46913.2� Translational Joint 48113.3� Microgripper 49513.4� Snap Lock 50813.5� Review 524

Chapter 14 Nonlinear Materials 526

14.1� Basics of Nonlinear Materials 52714.2� Belleville Washer 53614.3� Planar Seal 55314.4� Review 568

Chapter 15 Explicit Dynamics 570

15.1� Basics of Explicit Dynamics 57115.2� High-Speed Impact 57715.3� Drop Test 58715.4� Review 599

Index 601