| Preface | 6 |
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| Contents | 8 |
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| 1 Kinematics of Contact | 19 |
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| 1.1 Reference Frame and the Initial Gap Function | 20 |
| 1.2 Establishment of a Contact Region | 21 |
| 1.2.1 Definition of Contact | 22 |
| 1.2.2 The Boundary Value Problem | 22 |
| 1.2.3 Signorini Problems | 23 |
| 1.2.4 Asymptotic Arguments | 23 |
| 1.2.5 The Discrete Problem | 25 |
| 1.3 Nonlinear Kinematics | 26 |
| 1.4 Almost Conformal Contact | 27 |
| 2 Three-Dimensional Frictionless Elastic Problems | 30 |
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| 2.1 The Half-Space Approximation | 30 |
| 2.2 Normal Loading of the Half-Space | 31 |
| 2.2.1 The Point Force Solution | 32 |
| 2.2.2 Similarity, Equilibrium and Anisotropy | 33 |
| 2.2.3 The Composite Elastic Modulus | 34 |
| 2.3 Integral Equation Formulation | 35 |
| 2.3.1 Field-Point Integration | 37 |
| 2.3.2 Indentation by a Flat Elliptical Punch | 37 |
| 2.4 Galin's Theorem | 40 |
| 2.4.1 A Special Case | 41 |
| 2.5 Interior Stress Fields | 42 |
| 2.5.1 In-Plane Stress Components Near the Surface | 42 |
| 3 Hertzian Contact | 45 |
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| 3.1 Transformation of Coordinates | 45 |
| 3.1.1 Cylinders and Spheres | 47 |
| 3.1.2 More General Cases | 48 |
| 3.2 Hertzian Pressure Distribution | 49 |
| 3.3 Strategy for Hertzian Contact Calculations | 50 |
| 3.3.1 Eccentricity of the Contact Area | 50 |
| 3.3.2 Dimensions of the Contact Area | 51 |
| 3.3.3 Highly Elliptical Contacts | 54 |
| 3.4 First Yield | 55 |
| 4 More General Problems for the Half-Space | 58 |
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| 4.1 The Electrical--Mechanical Analogy | 59 |
| 4.1.1 Other Mathematical Analogies | 61 |
| 4.1.2 Boyer's Approximation | 63 |
| 4.1.3 Fabrikant's Approximation | 64 |
| 4.2 General Theorems for Frictionless Contact | 66 |
| 4.3 Superposition by Differentiation | 70 |
| 4.4 The Force--Displacement Relation | 72 |
| 4.4.1 Non-conformal Contact Problems | 73 |
| 5 Axisymmetric Contact Problems | 77 |
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| 5.1 Green and Collins Solution | 77 |
| 5.1.1 The Flat Punch Solution | 79 |
| 5.2 Non-conformal Contact Problems | 80 |
| 5.3 Annular Contact Regions | 82 |
| 5.4 The Non-axisymmetric Cylindrical Punch | 83 |
| 5.5 The Method of Dimensionality Reduction (MDR) | 84 |
| 6 Two-Dimensional Frictionless Contact Problems | 90 |
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| 6.1 The Line Force Solution | 91 |
| 6.2 Integral Equation Formulation | 93 |
| 6.2.1 Edge Conditions | 94 |
| 6.3 Incremental Solution of Non-conformal Contact Problems | 98 |
| 6.3.1 Symmetric Problems | 98 |
| 6.3.2 Bounded-Singular Problems | 99 |
| 6.4 Solution by Fourier Series | 99 |
| 6.4.1 Rigid-Body Rotation | 100 |
| 6.4.2 Galin's Theorem, Chebyshev Polynomials and Recurrence Relations | 102 |
| 6.5 Periodic Contact Problems | 104 |
| 6.5.1 Sinusoidal Contact Pressure | 104 |
| 6.5.2 Fourier Series Methods | 105 |
| 6.5.3 The Periodic Green's Function | 106 |
| 6.5.4 The Cotangent Transform | 106 |
| 6.5.5 Manners' Solution | 107 |
| 6.5.6 Westergaard's Problem | 109 |
| 6.6 The Smirnov--Sobolev Transform | 110 |
| 6.6.1 Inversion of the Transform | 111 |
| 6.6.2 Example: Uniform Loading Over the Circle | 111 |
| 6.6.3 Anisotropic Problems | 112 |
| 6.7 Displacements in Two-Dimensional Problems | 113 |
| 6.7.1 Kalker's Line Contact Theory | 115 |
| 7 Tangential Loading | 121 |
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| 7.1 Kinematics | 121 |
| 7.1.1 Gross Slip and Microslip | 122 |
| 7.2 Green's Functions for Tangential Forces and Displacements | 123 |
| 7.2.1 Three-Dimensional [point] Loading | 123 |
| 7.2.2 Two-Dimensional [line] Loading | 125 |
| 7.2.3 Normal-Tangential Coupling | 126 |
| 7.3 Two-Dimensional Flat Rigid Punch with No Slip | 127 |
| 7.3.1 Uncoupled Problem | 129 |
| 7.3.2 Oscillatory Singularities | 129 |
| 7.4 Axisymmetric Flat Rigid Punch with No Slip | 131 |
| 7.5 The `Goodman' Approximation | 133 |
| 7.6 Uniform Tangential Displacement in a Prescribed Area | 135 |
| 7.6.1 Tangential Loading over a Circular Area | 135 |
| 7.6.2 Tangential Loading over an Elliptical Area | 136 |
| 7.6.3 Two Conjectures | 138 |
| 7.7 Non-conformal Contact Problems with No Slip | 139 |
| 7.7.1 Uncoupled Hertzian Contact with Tangential Loading | 140 |
| 7.7.2 The Coupled Axisymmetric Problem under Purely Normal Loading | 141 |
| 7.7.3 The Coupled Two-Dimensional Problem | 142 |
| 7.7.4 Relaxation Damping | 144 |
| 8 Friction Laws | 149 |
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| 8.1 Amontons' Law | 149 |
| 8.1.1 Continuum Problems | 150 |
| 8.1.2 Two-Dimensional Problems | 151<
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