MohrCoulombplasticity.docVIP

ABAQUS Analysis Users Manual? 11.3.3?Mohr-Coulomb plasticity Product: ABAQUS/Standard?? Mohr-Coulomb plasticity is defined by using the *MOHR COULOMB option together with the *MOHR COULOMB HARDENING option. References *MOHR COULOMB *MOHR COULOMB HARDENING “Material library: overview,” Section 9.1.1 “Inelastic behavior,” Section 11.1.1 Overview The Mohr-Coulomb plasticity model: is used to model materials with the classical Mohr-Coloumb yield criterion; 用于模拟具有典型的莫尔－库仑屈服准则的材料 allows the material to harden and/or soften isotropically; 容许材料等向硬化和（或）软化 uses a smooth flow potential that has a hyperbolic shape in the meridional stress 使用光滑流势，在子午面上为双曲线形 plane and a piecewise elliptic shape in the deviatoric stress plane; 在偏应力面上为平面和分段椭圆形 is used with the linear elastic material model (“Linear elastic behavior,” Section 10.2.1); and 用于线弹性材料； can be used for design applications in the geotechnical engineering area to simulate material response under essentially monotonic loading. 可以用于地质工程中的设计，用来模拟材料在常量荷载下的相应 Elastic and plastic behavior 弹性和塑性行为 The elastic part of the response is specified on the *ELASTIC option. Linear isotropic elasticity is assumed. 弹性响应部分由*ELASTIC选项来指定。假定为线性等向弹性。 The hardening behavior of the material is specified using the *MOHR COULOMB HARDENING option. Isotropic cohesion hardening is assumed. The hardening curve must describe the cohesion yield stress as a function of plastic strain and, possibly, temperature and predefined field variables. In defining this dependence at finite strains, “true” (Cauchy) stress and logarithmic strain values should be given. 材料的硬化行为通过*MOHR COULOMH HARDENING选项来指定，假定为等向粘聚硬化。硬化曲线必须将粘聚屈服应力表达为塑性应变和（可能的话）温度及预设定场值的函数。在确定有限应变的可靠性时，必须指定真应力（柯西应力）和有效应变值。 Rate dependency effects are not accounted for in this plasticity model. Usage:?*MOHR COULOMB HARDENING Yield criterion 屈服准则 The Mohr-Coulomb criterion assumes that failure occurs when the shear stress on any point in a material reaches a value that depends linearly on the nor