一种弹塑性各向异性损伤模型  

An Anisotropic Elastoplastic Damage Model

作　　者：赵军[1] 

机构地区：[1]河南大学土木建筑学院,河南开封475001

出　　处：《河南大学学报（自然科学版）》2005年第1期86-91,共6页Journal of Henan University:Natural Science

基　　金：河南省教育厅自然科学研究项目(20015600013)

摘　　要：提出一种适用于任意非比例加载的弹塑性损伤模型. 设材料初始为各向同性,损伤状态由一个二阶张量表示,在损伤主轴系下受损材料为正交各向异性材料,弹塑性损伤本构关系可由有效应力-有效应变原则确立. 伤演速率也由一个二阶张量表示,并设其主轴系与损伤有效应力主轴系重合. 各向异性的伤演规律可由能量平衡及当量单参数方程所确定.A new anisotropic elastoplastic damage model for arbitrary nonproportional loading is developed. The material is isotropic initially. The damage is described with a twoorder tensor and the damaged material appears to be orthogonal anisotropic under the principal axes of the damage tensor. The elastoplastic constitutive relations are achieved based on the effective stresseffective strain principle. The damage evolution rate is expressed with a twoorder tensor, of which the principal axes coincide with those of the damage effective stress. The anisotropic damage evolution law is obtained by the virtue of energy equilibrium and an equivalent singe variable equation.

关 键 词：弹塑性 本构关系 损伤 各向异性 非比例加载 

分 类 号：V215.6[航空宇航科学与技术—航空宇航推进理论与工程]