Foreword |
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xiii | |
Series Preface |
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xv | |
List of Symbols and Abbreviations |
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xvii | |
Introduction |
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xxiii | |
About the Companion Website |
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xxxv | |
1 Elastic Anisotropic Behavior of Composite Materials |
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1 | (20) |
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1.1 Anisotropic Elasticity of Composite Materials |
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1 | (6) |
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1.1.1 Fourth Rank Tensor Notation of Hooke's Law |
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1 | (1) |
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1.1.2 Voigt's Matrix Notation of Hooke's Law |
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2 | (3) |
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1.1.3 Kelvin's Matrix Notation of Hooke's Law |
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5 | (2) |
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1.2 Unidirectional Fiber Bundle |
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7 | (3) |
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1.2.1 Components of a Unidirectional Fiber Bundle |
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7 | (1) |
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1.2.2 Elastic Properties of a Unidirectional Fiber Bundle |
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7 | (1) |
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1.2.3 Effective Elastic Constants of Unidirectional Composites |
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8 | (2) |
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1.3 Rotational Transformations of Material Laws, Stress and Strain |
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10 | (4) |
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1.3.1 Rotation of Fourth Rank Elasticity Tensors |
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11 | (1) |
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1.3.2 Rotation of Elasticity Matrices in Voigt's Notation |
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11 | (2) |
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1.3.3 Rotation of Elasticity Matrices in Kelvin's Notation |
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13 | (1) |
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1.4 Elasticity Matrices for Laminated Plates |
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14 | (3) |
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1.4.1 Voigt's Matrix Notation for Anisotropic Plates |
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14 | (1) |
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1.4.2 Rotation of Matrices in Voigt's Notation |
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15 | (1) |
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1.4.3 Kelvin's Matrix Notation for Anisotropic Plates |
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15 | (1) |
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1.4.4 Rotation of Matrices in Kelvin's Notation |
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16 | (1) |
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1.5 Coupling Effects of Anisotropic Laminates |
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17 | (1) |
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1.5.1 Orthotropic Laminate Without Coupling |
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17 | (1) |
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1.5.2 Anisotropic Laminate Without Coupling |
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17 | (1) |
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1.5.3 Anisotropic Laminate With Coupling |
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17 | (1) |
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1.5.4 Coupling Effects in Laminated Thin-Walled Sections |
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18 | (1) |
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18 | (1) |
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19 | (2) |
2 Phenomenological Failure Criteria of Composites |
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21 | (24) |
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2.1 Phenomenological Failure Criteria |
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21 | (12) |
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2.1.1 Criteria for Static Failure Behavior |
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21 | (1) |
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2.1.2 Stress Failure Criteria for Isotropic Homogenous Materials |
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21 | (1) |
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2.1.3 Phenomenological Failure Criteria for Composites |
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22 | (1) |
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2.1.4 Phenomenological Criteria Without Stress Coupling |
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23 | (1) |
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2.1.4.1 Criterion of Maximum Averaged Stresses |
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23 | (1) |
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2.1.4.2 Criterion of Maximum Averaged Strains |
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24 | (1) |
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2.1.5 Phenomenological Criteria with Stress Coupling |
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24 | (9) |
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2.1.5.1 Mises-Hill Anisotropic Failure Criterion |
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24 | (2) |
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2.1.5.2 Pressure-Sensitive Mises-Hill Anisotropic Failure Criterion |
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26 | (1) |
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2.1.5.3 Tensor-Polynomial Failure Criterion |
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27 | (3) |
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2.1.5.4 Tsai-Wu Criterion |
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30 | (1) |
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2.1.5.5 Assessment of Coefficients in Tensor-Polynomial Criteria |
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30 | (3) |
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2.2 Differentiating Criteria |
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33 | (2) |
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2.2.1 Fiber and Intermediate Break Criteria |
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33 | (1) |
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2.2.2 Hashin Strength Criterion |
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33 | (2) |
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2.2.3 Delamination Criteria |
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35 | (1) |
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2.3 Physically Based Failure Criteria |
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35 | (2) |
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35 | (1) |
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36 | (1) |
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2.4 Rotational Transformation of Anisotropic Failure Criteria |
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37 | (3) |
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40 | (1) |
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40 | (5) |
3 Micromechanical Failure Criteria of Composites |
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45 | (60) |
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3.1 Pullout of Fibers from the Elastic-Plastic Matrix |
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45 | (15) |
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3.1.1 Axial Tension of Fiber and Matrix |
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45 | (6) |
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3.1.2 Shear Stresses in Matrix Cylinders |
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51 | (2) |
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3.1.3 Coupled Elongation of Fibers and Matrix |
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53 | (1) |
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3.1.4 Failures in Matrix and Fibers |
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54 | (3) |
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3.1.4.1 Equations for Mean Axial Displacements of Fibers and Matrix |
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54 | (2) |
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3.1.4.2 Solutions of Equations for Mean Axial Displacements of Fibers and Matrix |
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56 | (1) |
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3.1.5 Rupture of Matrix and Pullout of Fibers from Crack Edges in a Matrix |
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57 | (2) |
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3.1.5.1 Elastic Elongation (Case I) |
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57 | (1) |
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3.1.5.2 Plastic Sliding on the Fiber Surface (Case II) |
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58 | (1) |
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3.1.5.3 Fiber Breakage (Case III) |
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58 | (1) |
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3.1.6 Rupture of Fibers, Matrix Joints and Crack Edges |
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59 | (1) |
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3.2 Crack Bridging in Elastic-Plastic Unidirectional Composites |
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60 | (15) |
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3.2.1 Crack Bridging in Unidirectional Fiber-Reinforced Composites |
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60 | (1) |
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3.2.2 Matrix Crack Growth |
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61 | (1) |
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62 | (3) |
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65 | (7) |
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3.2.4.1 Crack in a Transversal-Isotropic Medium |
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65 | (1) |
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3.2.4.2 Mechanisms of the Fracture Process |
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66 | (1) |
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3.2.4.3 Crack Bridging in an Orthotropic Body With Disk Crack |
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66 | (2) |
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3.2.4.4 Solution to an Axially Symmetric Crack Problem |
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68 | (4) |
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3.2.5 Plane Crack Problem |
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72 | (3) |
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3.2.5.1 Equations of the Plane Crack Problem |
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72 | (2) |
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3.2.5.2 Solution to the Plane Crack Problem |
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74 | (1) |
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3.3 Debonding of Fibers in Unidirectional Composites |
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75 | (23) |
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3.3.1 Axial Deformation of Unidirectional Fiber Composites |
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75 | (4) |
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3.3.2 Stresses in Unidirectional Composite in Cases of Ideal Debonding or Adhesion |
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79 | (5) |
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3.3.2.1 Equations of an Axially Loaded Unidirectional Compound Medium (A) |
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79 | (3) |
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3.3.2.2 Total Debonding (B) |
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82 | (1) |
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3.3.2.3 Ideal Adhesion (C) |
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83 | (1) |
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3.3.3 Stresses in a Unidirectional Composite in a Case of Partial Debonding |
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84 | (5) |
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3.3.3.1 Partial Radial Load on the Fiber Surface |
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84 | (1) |
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3.3.3.2 Partial Radial Load on the Matrix Cavity Surface |
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84 | (1) |
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3.3.3.3 Partial Debonding With Central Adhesion Region (D) |
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85 | (3) |
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3.3.3.4 Partial Debonding With Central Debonding Region (E) |
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88 | (1) |
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3.3.3.5 Semi-Infinite Debonding With Central Debonding Region (F) |
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89 | (1) |
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3.3.4 Contact Problem for a Finite Adhesion Region |
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89 | (4) |
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3.3.5 Debonding of a Semi-Infinite Adhesion Region |
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93 | (2) |
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3.3.6 Debonding of Fibers from a Matrix Under Cyclic Deformation |
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95 | (3) |
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98 | (1) |
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98 | (7) |
4 Optimization Principles for Structural Elements Made of Composites |
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105 | (24) |
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4.1 Stiffness Optimization of Anisotropic Structural Elements |
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105 | (5) |
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4.1.1 Optimization Problem |
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105 | (1) |
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4.1.2 Optimality Conditions |
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106 | (3) |
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4.1.3 Optimal Solutions in Anti-Plane Elasticity |
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109 | (1) |
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4.1.4 Optimal Solutions in Plane Elasticity |
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109 | (1) |
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4.2 Optimization of Strength and Loading Capacity of Anisotropic Elements |
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110 | (6) |
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4.2.1 Optimization Problem |
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110 | (3) |
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4.2.2 Optimality Conditions |
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113 | (1) |
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4.2.3 Optimal Solutions in Anti-Plane Elasticity |
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114 | (1) |
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4.2.4 Optimal Solutions in Plane Elasticity |
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114 | (2) |
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4.3 Optimization of Accumulated Elastic Energy in Flexible Anisotropic Elements |
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116 | (3) |
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4.3.1 Optimization Problem |
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116 | (1) |
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4.3.2 Optimality Conditions |
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117 | (1) |
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4.3.3 Optimal Solutions in Anti-Plane Elasticity |
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118 | (1) |
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4.3.4 Optimal Solutions in Plane Elasticity |
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119 | (1) |
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4.4 Optimal Anisotropy in a Twisted Rod |
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119 | (3) |
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4.5 Optimal Anisotropy of Bending Console |
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122 | (1) |
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4.6 Optimization of Plates in Bending |
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123 | (2) |
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125 | (1) |
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125 | (4) |
5 Optimization of Composite Driveshaft |
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129 | (26) |
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5.1 Torsion of Anisotropic Shafts With Solid Cross-Sections |
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129 | (3) |
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5.2 Thin-Walled Anisotropic Driveshaft with Closed Profile |
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132 | (3) |
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5.2.1 Geometry of Cross-Section |
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132 | (1) |
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5.2.2 Main Kinematic Hypothesis |
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133 | (2) |
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5.3 Deformation of a Composite Thin-Walled Rod |
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135 | (6) |
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5.3.1 Equations of Deformation of a Anisotropic Thin-Walled Rod |
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135 | (3) |
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5.3.2 Boundary Conditions |
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138 | (2) |
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138 | (1) |
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138 | (2) |
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5.3.2.3 Boundary Conditions of the Intermediate Type |
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140 | (1) |
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5.3.3 Governing Equations in Special Cases of Symmetry |
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140 | (1) |
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5.3.3.1 Orthotropic Material |
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140 | (1) |
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5.3.3.2 Constant Elastic Properties Along the Arc of a Cross-Section |
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140 | (1) |
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5.3.4 Symmetry of Section |
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140 | (1) |
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5.4 Buckling of Composite Driveshafts Under a Twist Moment |
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141 | (5) |
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5.4.1 Greenhill's Buckling of Driveshafts |
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141 | (2) |
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5.4.2 Optimal Shape of the Solid Cross-Section for Driveshaft |
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143 | (1) |
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5.4.3 Hollow Circular and Triangular Cross-Sections |
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144 | (2) |
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5.5 Patents for Composite Driveshafts |
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146 | (4) |
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150 | (1) |
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150 | (5) |
6 Dynamics of a Vehicle with Rigid Structural Elements of Chassis |
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155 | (28) |
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6.1 Classification of Wheel Suspensions |
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155 | (4) |
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6.1.1 Common Designs of Suspensions |
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155 | (1) |
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6.1.2 Types of Twist-Beam Axles |
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156 | (1) |
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6.1.3 Kinematics of Wheel Suspensions |
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157 | (2) |
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6.2 Fundamental Models in Vehicle Dynamics |
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159 | (8) |
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6.2.1 Basic Variables of Vehicle Dynamics |
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159 | (2) |
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6.2.2 Coordinate Systems of Vehicle and Local Coordinate Systems |
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161 | (1) |
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6.2.2.1 Earth-Fixed Coordinate System |
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161 | (1) |
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6.2.2.2 Vehicle-Fixed Coordinate System |
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162 | (1) |
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6.2.2.3 Horizontal Coordinate System |
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162 | (1) |
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6.2.2.4 Wheel Coordinate System |
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162 | (1) |
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162 | (1) |
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6.2.4 Components of Force and Moments in Car Dynamics |
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163 | (1) |
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6.2.5 Degrees of Freedom of a Vehicle |
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163 | (4) |
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6.3 Forces Between Tires and Road |
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167 | (3) |
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167 | (1) |
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6.3.2 Side Slip Curve and Lateral Force Properties |
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168 | (2) |
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6.4 Dynamic Equations of a Single-Track Model |
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170 | (12) |
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6.4.1 Hypotheses of a Single-Track Model |
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170 | (1) |
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6.4.2 Moments and Forces in a Single-Track Model |
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171 | (2) |
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6.4.3 Balance of Forces and Moments in a Single-Track Model |
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173 | (1) |
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174 | (5) |
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6.4.4.1 Necessary Steer Angle for Steady Cornering |
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174 | (1) |
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6.4.4.2 Yaw Gain Factor and Steer Angle Gradient |
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175 | (1) |
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6.4.4.3 Classification of Self-Steering Behavior |
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176 | (3) |
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6.4.5 Non-Steady Cornering |
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179 | (2) |
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6.4.5.1 Equations of Non-Stationary Cornering |
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179 | (1) |
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6.4.5.2 Oscillatory Behavior of Vehicle During Non-Steady Cornering |
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180 | (1) |
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6.4.6 Anti-Roll Bars Made of Composite Materials |
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181 | (1) |
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182 | (1) |
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182 | (1) |
7 Dynamics of a Vehicle With Flexible, Anisotropic Structural Elements of Chassis |
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183 | (34) |
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7.1 Effects of Body and Chassis Elasticity on Vehicle Dynamics |
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183 | (5) |
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7.1.1 Influence of Body Stiffness on Vehicle Dynamics |
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183 | (1) |
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7.1.2 Lateral Dynamics of Vehicles With Stiff Rear Axles |
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184 | (1) |
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7.1.3 Induced Effects on Wheel Orientation and Positioning of Vehicles with Flexible Rear Axle |
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185 | (3) |
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7.2 Self-Steering Behavior of a Vehicle With Coupling of Bending and Torsion |
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188 | (8) |
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7.2.1 Countersteering for Vehicles with Twist-Beam Axles |
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188 | (4) |
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7.2.1.1 Countersteering Mechanisms |
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188 | (2) |
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7.2.1.2 Countersteering by Anisotropic Coupling of Bending and Torsion |
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190 | (2) |
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7.2.2 Bending-Twist Coupling of a Countersteering Twist-Beam Axle |
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192 | (1) |
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7.2.3 Roll Angle of Vehicle |
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193 | (3) |
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7.2.3.1 Relationship Between Roll Angle and Centrifugal Force |
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193 | (1) |
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7.2.3.2 Lateral Reaction Forces on Wheels |
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193 | (1) |
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7.2.3.3 Steer Angles on Front Wheels |
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194 | (1) |
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7.2.3.4 Steer Angles on Rear Wheels |
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194 | (2) |
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7.3 Steady Cornering of a Flexible Vehicle |
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196 | (3) |
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7.3.1 Stationary Cornering of a Car With a Flexible Chassis |
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196 | (1) |
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7.3.2 Necessary Steer Angles for Coupling and Flexibility of Chassis |
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196 | (3) |
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7.3.2.1 Limit Case: Lateral Acceleration Vanishes |
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196 | (1) |
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7.3.2.2 Absolutely Rigid Front and Rear Wheel Suspensions |
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197 | (1) |
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7.3.2.3 Bending and Torsion of a Twist Member Completely Decoupled |
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197 | (1) |
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7.3.2.4 General Case of Coupling Between Bending and Torsion of a Twist Member |
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198 | (1) |
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7.3.2.5 Neutral Steering Caused by Coupling Between Bending and Torsion of a Twist Member |
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198 | (1) |
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7.4 Estimation of Coupling Constant for a Twist Member |
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199 | (4) |
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7.4.1 Coupling Between Vehicle Roll Angle and Twist of Cross-Member |
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199 | (1) |
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7.4.2 Stiffness Parameters of a Twist-Beam Axle |
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200 | (3) |
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200 | (1) |
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7.4.2.2 Lateral Stiffness |
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201 | (2) |
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203 | (1) |
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7.5 Design of the Countersteering Twist-Beam Axle |
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203 | (8) |
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7.5.1 Requirements for a Countersteering Twist-Beam Axle |
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203 | (2) |
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7.5.2 Selection and Calculation of the Cross-Section for the Cross-Member |
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205 | (3) |
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7.5.3 Elements of a Countersteering Twist-Beam Axle |
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208 | (3) |
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7.6 Patents on Twist-Beam Axles |
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211 | (3) |
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214 | (1) |
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214 | (3) |
8 Design and Optimization of Composite Springs |
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217 | (38) |
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8.1 Design and Optimization of Anisotropic Helical Springs |
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217 | (16) |
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8.1.1 Forces and Moments in Helical Composite Springs |
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217 | (3) |
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8.1.2 Symmetrically Designed Solid Bar With Circular Cross-Section |
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220 | (3) |
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8.1.3 Stiffness and Stored Energy of Helical Composite Springs |
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223 | (2) |
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8.1.4 Spring Rates of Helical Composite Springs |
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225 | (3) |
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8.1.5 Helical Composite Springs of Minimal Mass |
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228 | (3) |
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8.1.5.1 Optimization Problem |
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228 | (1) |
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8.1.5.2 Optimal Composite Spring for the Anisotropic Mises-Hill Strength Criterion |
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228 | (3) |
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8.1.6 Axial and Twist Vibrations of Helical Springs |
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231 | (2) |
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8.2 Conical Springs Made of Composite Material |
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233 | (11) |
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8.2.1 Geometry of an Anisotropic Conical Spring in an Undeformed State |
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233 | (2) |
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8.2.2 Curvature and Strain Deviations |
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235 | (1) |
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8.2.3 Thin-Walled Conical Shells Made of Anisotropic Materials |
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236 | (1) |
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8.2.4 Variation Principle |
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237 | (2) |
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8.2.5 Structural Optimization of a Conical Spring Due to Ply Orientation |
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239 | (2) |
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8.2.6 Conical Spring Made of Orthotropic Material |
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241 | (2) |
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8.2.7 Bounds for Stiffness of a Spring Made of Orthotropic Material |
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243 | (1) |
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8.3 Alternative Concepts for Chassis Springs Made of Composites |
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244 | (4) |
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248 | (1) |
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249 | (6) |
9 Equivalent Beams of Helical Anisotropic Springs |
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255 | (14) |
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9.1 Helical Compression Springs Made of Composite Materials |
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255 | (5) |
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9.1.1 Statics of the Equivalent Beam for an Anisotropic Spring |
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255 | (3) |
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9.1.2 Dynamics of an Equivalent Beam for an Anisotropic Spring |
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258 | (2) |
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9.2 Transverse Vibrations of a Composite Spring |
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260 | (5) |
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9.2.1 Separation of Variables |
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260 | (2) |
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9.2.2 Fundamental Frequencies of Transversal Vibrations |
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262 | (2) |
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9.2.3 Transverse Vibrations of a Symmetrically Stacked Helical Spring |
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264 | (1) |
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9.3 Side Buckling of a Helical Composite Spring |
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265 | (2) |
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9.3.1 Buckling Under Axial Force |
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265 | (1) |
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9.3.2 Simplified Formulas for Buckling of a Symmetrically Stacked Helical Spring |
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266 | (1) |
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267 | (1) |
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267 | (2) |
10 Composite Leaf Springs |
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269 | (20) |
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10.1 Longitudinally Mounted Leaf Springs for Solid Axles |
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269 | (6) |
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10.1.1 Predominantly Bending-Loaded Leaf Springs |
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269 | (1) |
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10.1.2 Moments and Forces of Leaf Springs in a Pure Bending State |
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270 | (2) |
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10.1.3 Optimization of Leaf Springs for an Anisotropic Mises-Hill Criterion |
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272 | (3) |
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10.2 Leaf-Tension Springs |
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275 | (3) |
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10.2.1 Combined Bending and Tension of a Spring |
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275 | (2) |
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10.2.2 Forces and Rates of Leaf-Tension Springs |
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277 | (1) |
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10.3 Transversally Mounted Leaf Springs |
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278 | (8) |
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10.3.1 Axle Concepts of Transverse Leaf Springs |
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278 | (2) |
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10.3.2 Analysis of a Transverse Leaf Spring |
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280 | (3) |
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10.3.3 Examples and Patents for Transversely Mounted Leaf Springs |
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283 | (3) |
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286 | (1) |
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287 | (2) |
11 Meander-Shaped Springs |
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289 | (28) |
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11.1 Meander-Shaped Compression Springs for Automotive Suspensions |
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289 | (5) |
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11.1.1 Bending Stress State of Corrugated Springs |
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289 | (3) |
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11.1.2 "Equivalent Beam" of a Meander Spring |
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292 | (1) |
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11.1.3 Axial and Lateral Stiffness of Corrugated Springs |
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292 | (1) |
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11.1.4 Effective Spring Constants of Meander and Coil Springs for Bending and Compression |
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293 | (1) |
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11.2 Multiarc-Profiled Spring Under Axial Compressive Load |
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294 | (5) |
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11.2.1 Multiarc Meander Spring With Constant Cross-Section |
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294 | (3) |
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11.2.2 Multiarc Meander Spring With Optimal Cross-Section |
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297 | (1) |
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11.2.3 Comparison of Masses for Fixed Spring Rate and Stress |
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298 | (1) |
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11.3 Sinusoidal Spring Under Compressive Axial Load |
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299 | (4) |
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11.3.1 Sinusoidal Meander Spring With Constant Cross-Section |
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299 | (2) |
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11.3.2 Sinusoidal Meander Spring With Optimal Cross-Section |
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301 | (1) |
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11.3.3 Comparison of Masses for Fixed Spring Rate and Stress |
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302 | (1) |
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11.4 Bending Stiffness of Meander Spring With a Constant Cross-Section |
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303 | (1) |
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11.4.1 Bending Stiffness of a Multiarc Meander Spring With a Constant Cross-Section |
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303 | (1) |
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11.4.2 Bending Stiffness of a Sinusoidal Meander Spring with a Constant Cross-Section |
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303 | (1) |
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11.5 Stability of Corrugated Springs |
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304 | (3) |
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11.5.1 Euler's Buckling of an Axially Compressed Rod |
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304 | (2) |
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11.5.2 Side Buckling of Meander Springs |
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306 | (1) |
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11.6 Patents for Chassis Springs Made of Composites in Meandering Form |
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307 | (7) |
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314 | (1) |
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315 | (2) |
12 Hereditary Mechanics of Composite Springs and Driveshafts |
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317 | (14) |
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12.1 Elements of Hereditary Mechanics of Composite Materials |
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317 | (5) |
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12.1.1 Mechanisms of Time-Dependent Deformation of Composites |
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317 | (1) |
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12.1.2 Linear Viscoelasticity of Composites |
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318 | (1) |
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12.1.3 Nonlinear Creep Mechanics of Anisotropic Materials |
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319 | (2) |
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12.1.4 Anisotropic Norton-Bailey Law |
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321 | (1) |
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12.2 Creep and Relaxation of Twisted Composite Shafts |
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322 | (1) |
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12.2.1 Constitutive Equations for Relaxation in Torsion of Anisotropic Shafts |
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322 | (1) |
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12.2.2 Torque Relaxation for an Anisotropic Norton-Bailey Law |
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322 | (1) |
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12.3 Creep and Relaxation of Composite Helical Coiled Springs |
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323 | (2) |
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12.3.1 Compression and Tension Composite Springs |
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323 | (1) |
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12.3.2 Relaxation of Helical Composite Springs |
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324 | (1) |
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12.3.3 Creep of Helical Composite Compression Springs |
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324 | (1) |
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12.4 Creep and Relaxation of Composite Springs in a State of Pure Bending |
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325 | (2) |
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12.4.1 Constitutive Equations for Bending Relaxation |
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325 | (1) |
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12.4.2 Relaxation of the Bending Moment for the Anisotropic Norton-Bailey Law |
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326 | (1) |
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12.4.3 Creep in a State of Bending |
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326 | (1) |
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327 | (1) |
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327 | (4) |
Appendix A Mechanical Properties of Composites |
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331 | (6) |
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331 | (1) |
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331 | (1) |
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331 | (1) |
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331 | (1) |
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A.2 Physical Properties of Resin |
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332 | (2) |
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334 | (1) |
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A.3.1 Unidirectional Fiber-Reinforced Composite Material |
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|
334 | (1) |
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334 | (1) |
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334 | (1) |
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|
335 | (2) |
Appendix B Anisotropic Elasticity |
|
337 | (6) |
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B.1 Elastic Orthotropic Body |
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337 | (1) |
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B.2 Distortion Energy and Supplementary Energy |
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|
338 | (1) |
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B.3 Plane Elasticity Problems |
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|
339 | (1) |
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|
339 | (1) |
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|
339 | (1) |
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B.4 Generalized Airy Stress Function |
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340 | (3) |
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340 | (1) |
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|
340 | (1) |
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B.4.3 Rotationally Symmetric Elasticity Problems |
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|
340 | (3) |
Appendix C Integral Transforms in Elasticity |
|
343 | (8) |
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C.1 One-Dimensional Integral Transform |
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|
343 | (1) |
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C.2 Two-Dimensional Fourier Transform |
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|
344 | (1) |
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C.3 Potential Functions for Plane Elasticity Problems |
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|
344 | (2) |
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C.4 Rotationally Symmetric, Spatial Elasticity Problems |
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|
346 | (2) |
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C.5 Application of the Fourier Transformation to Plane Elasticity Problems |
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|
348 | (1) |
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C.6 Application of the Hankel Transformation to Spatial, Rotation-Symmetric Elasticity Problems |
|
|
349 | (2) |
Index |
|
351 | |