用于应变局部化行为分析的弹塑性损伤耦合本构研究  

Investigation on Elasto-Plastic Constitutive Model Coupled With Damage for Localization Phenomena

作　　者：沈新普[1] 沈国晓[2] 陈立新 

机构地区：[1]沈阳工业大学建筑工程学院,沈阳110023 [2]太原重型机械学院应用科学系,太原030024 [3]东北煤田地质局煤层甲烷气开发中心,沈阳110035

出　　处：《应用数学和力学》2004年第12期1249-1256,共8页Applied Mathematics and Mechanics

基　　金：辽宁省自然科学基金资助项目(2001101023)

摘　　要：　在已有的损伤塑性耦合本构模型基础上,进行了本构意义上的参数辨识,对不同参数取值时的材料行为进行了数值模拟,并对损伤演化律提出了改进措施·　应用改进了的模型,在结构意义上进行了数值检验,模拟了简单试件拉伸时的变形局部化·　数值结果表明这一理论模型有更好的数值稳定性。On the basis of existing plasticity_based damage model for plasticity coupled with damage for localization analysis, constitutive parameter identification was carried out through a series of numerical tests at local level.And then improvements were made on the expressions of the evolution laws of damage. Strain localization phenomena were simulated with a typical double_notched specimen under tensions. Numerical results indicate the validity of the proposed theory.

关 键 词：损伤 塑性 局部化 本构模型 

分 类 号：O342[理学—固体力学]