Viscoelastic Machine Elements (eBook)

Front Cover 1
Viscoelastic Machine Elements: Elastomers and Lubricants in Machine Systems 4
Copyright Page 5
Table of Contents 6
Dedication 3
Preface 10
Chapter 1. Design methodology 12
1.1 Invention and design 12
1.2 The design of machine elements 13
1.3 The role of creativity 14
1.4 The morphology and methodology of design 16
1.5 Prototype machinery 17
1.6 Model scaling laws 19
1.7 Mechanical simulation 21
1.8 Thermodynamic aspects of design 22
1.9 The central role of tribology 23
1.10 The design envelope 25
1.11 Viscoelastic machine elements 27
1.12 General design guidelines 28
Chapter 2. Fundamentals of viscoelasticity 30
2.1 Viscoelasticity 30
2.2 Generalized Hooke's Law 31
2.3 Complex modulus and compliance 32
2.4 Mechanical models 35
2.5 Creep and relaxation behaviour 43
2.6 Sinusoidal motions 53
2.7 Frequency and temperature dependence 57
2.8 Stiffening and pressure asymmetry effects 60
2.9 The complex Voigt model 63
2.10 Bulk modulus concept 69
2.11 Complex viscosity 73
2.12 Conclusion 75
Chapter 3. Elastomeric machine elements 78
3.1 Polymers and elastomers 78
3.2 Elastomeric machine elements 80
3.3 Vibration absorption models 80
3.4 Rolling-contact machine elements 114
3.5 Elastomeric layers and linings 141
3-6 Summary 148
Chapter 4. Fluidic machine elements 150
4.1 Squeeze-film machine elements 150
4.2 Fundamental design equations 151
4.3 Impact and impulse loading 161
4.4 Vibration absorption models 165
4.5 Surface texture interactions 178
4.6 Non-planar squeeze-films 182
4.7 Hydrostatic machine elements 186
4.8 Hydrodynamic pressure wedges 191
4.9 Hydromagnetic squeeze-films 199
4.10 Miscellaneous effects 201
4.11 Porous squeeze-films 208
4.12 Micro-lubrication case study 210
Chapter 5. Elasto-fluidic combination elements 216
5.1 Introduction 216
5.2 Discrete combination elements 217
5.3 Layered combination elements 236
5.4 Matrix combination elements 241
Chapter 6. Elastohydrodynamic interactions 252
6.1 Introduction 252
6.2 General iterative procedure 253
6.3 Normal approach 256
6.4 Tangential motion 264
6.5 Combined normal and tangential motion 265
6.6 The elastohydrodynamic number 267
6.7 Elastohydrodynamic transition speed 268
6.8 Macro-elastohydrodynamics 276
6.9 Viscoelasto-hydrodynamics 281
6.10 Typical elastohydrodynamic applications 284
Chapter 7. New measurement techniques 308
7.1 Introduction 308
7.2 The flexible laboratory system concept 309
7.3 Advanced measurement techniques 320
Appendix: Two degree-of-freedom model of system 338
References 341
Bibliography 344
Index 346