计算接触力学(Computational Contact Mechanics)扫描版[PDF]

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资源信息： 中文名: 计算接触力学 原名: Computational Contact Mechanics 作者: Peter Wriggers 图书分类: 科技 资源格式: PDF 版本: 扫描版 出版社: Peter Wriggers 书号: ISBN-10 3-540-32608 发行时间: 2006年01月01日 地区: 美国 语言: 英文 概述:

内容简介： Contact mechanics has its application in many engineering problems. No one can walk without frictional contact, and no car would move for the same reason. Hence contact mechanics has, from an engineering point of view, a long history, beginning in ancient Egypt with the movement of large stone blocks, over first experimental contributions from leading scientists like Leonardo da Vinci and Coulomb, to today’s computational methods. In the past contact conditions were often modelled in engineering analysis by more simple boundary conditions since analytical solutions were not present for real world applications. In such cases, one investigated contact as a local problem using the stress and strain fields stemming from the analysis which was performed for the entire structure. With the rapidly increasing power of modern computers, more and more numerical simulations in engineering can include contact constraints directly, which make the problems nonlinear. This book is an account of the modern theory of nonlinear continuum mechanics and its application to contact problems, as well as of modern simulation techniques for contact problems using the finite element method. The latter includes a variety of discretization techniques for small and large deformation contact. Algorithms play another prominent role when robust and efficient techniques have to be designed for contact simulations. Finally, adaptive methods based on error controlled finite element analysis and mesh adaption techniques are of great interest for the reliable numerical solution of contact problems. Nevertheless, all numerical models need a strong backup provided by modern continuum mechanics and its constitutive theory, which is applied in this book to the development of interface laws for normal and frictional contact. 内容截图：

目录: 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2 Introduction to Contact Mechanics . . . . . . . . . . . . . . . . . . . . . . . . 11 2.1 Contact in a Mass Spring System. . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.1.1 General formulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.1.2 Lagrange multiplier method . . . . . . . . . . . . . . . . . . . . . . . . 15 2.1.3 Penalty method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2.2 Finite Element Analysis of the Contact of Two Bars . . . . . . . . . 18 2.3 Thermo-mechanical Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 2.4 Impact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 3 Continuum Solid Mechanics and Weak Forms. . . . . . . . . . . . . . 31 3.1 Kinematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 3.1.1 Motion and deformation gradient . . . . . . . . . . . . . . . . . . . . 31 3.1.2 Strain measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 3.1.3 Transformation of vectors and tensors . . . . . . . . . . . . . . . . 36 3.1.4 Time derivatives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 3.2 Balance Laws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 3.2.1 Balance of mass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 3.2.2 Local balance of momentum and moments of momentum 38 3.2.3 First law of thermodynamics . . . . . . . . . . . . . . . . . . . . . . . . 39 3.2.4 Transformation to the initial configuration, different stress tensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 3.3 Weak Form of Balance of Momentum, Variational Principles . . 41 3.3.1 Weak form of balance of momentum in the initial configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 3.3.2 Spatial form of the weak formulation . . . . . . . . . . . . . . . . . 42 3.3.3 Minimum of total potential energy . . . . . . . . . . . . . . . . . . . 43 3.4 Constitutive Equations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 3.4.1 Hyperelastic response function . . . . . . . . . . . . . . . . . . . . . . 44 3.5 Linearizations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 3.5.1 Linearization of kinematical quantities . . . . . . . . . . . . . . . 51 3.5.2 Linearization of constitutive equations . . . . . . . . . . . . . . . 52 3.5.3 Linearization of the weak form . . . . . . . . . . . . . . . . . . . . . . 53 3.5.4 Linearization of a deformation dependent load . . . . . . . . 55 4 Contact Kinematics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 4.1 Normal Contact of Three-dimensional Bodies . . . . . . . . . . . . . . . 58 4.2 Tangential Contact of Three-dimensional Bodies . . . . . . . . . . . . . 62 4.2.1 Stick condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 4.2.2 Slip condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 4.3 Variation of the Normal and Tangential Gap . . . . . . . . . . . . . . . . 66 4.3.1 Variation of normal gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 4.3.2 Variation of tangential gap . . . . . . . . . . . . . . . . . . . . . . . . . 67 5 Constitutive Equations for Contact Interfaces . . . . . . . . . . . . . 69 5.1 Normal Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 5.1.1 Constraint formulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 5.1.2 Constitutive equations for normal contact . . . . . . . . . . . . 72 5.2 Tangential Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 5.2.1 Stick as a constraint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 5.2.2 Coulomb law . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 5.2.3 Regularization of the Coulomb law . . . . . . . . . . . . . . . . . . 79 5.2.4 Elasto-plastic analogy for friction . . . . . . . . . . . . . . . . . . . . 80 5.2.5 Friction laws for metal forming . . . . . . . . . . . . . . . . . . . . . . 86 5.2.6 Friction laws for rubber and polymers . . . . . . . . . . . . . . . . 88 5.2.7 Friction laws for concrete structures on soil . . . . . . . . . . . 90 5.2.8 Friction laws from computational homogenization procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 5.3 Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 5.4 Adhesion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 5.5 Decohesion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 5.6 Wear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 5.7 Fractal Contact Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 6 Contact Boundary Value Problem and Weak Form . . . . . . . . 109 6.1 Frictionless Contact in Linear Elasticity . . . . . . . . . . . . . . . . . . . . 109 6.2 Frictionless Contact in Finite Deformations Problems . . . . . . . . 113 6.3 Treatment of Contact Constraints . . . . . . . . . . . . . . . . . . . . . . . . . 115 6.3.1 Lagrange multiplier method . . . . . . . . . . . . . . . . . . . . . . . . 117 6.3.2 Penalty method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118 6.3.3 Direct constraint elimination . . . . . . . . . . . . . . . . . . . . . . . . 120 6.3.4 Constitutive equation in the interface . . . . . . . . . . . . . . . . 121 6.3.5 Nitsche method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122