摘要
在Ｇｕｒｓｏｎ理论基础上，通过对空洞模型的分析，推导出各向同性／运动混合强化材料的损伤演化和弱化函数的表达式，并将其嵌入内时本构框架，得到了损伤弹塑性大变形内时本构方程。编制了相应的轴对称有限元分析程序，用其分析圆柱拉伸试件的颈缩，得到与实验较为吻合的结果。
In this paper,throush the analysis for microscopic void model the more realisticand simplified description of growth and nucleation of voids and softening function has been derivedfor isotropic and kinematical hardening materials.The damage evolution equation is embed into anew incremental endochronic elaStoplastic constitutive equation for large deformation,and a damageconstitutive equation has been got.The effect of void evolution on the constitutive equation is denoted by a softenins function w(f) and an it6m reflecting mat6rials plastic expand.A numerical algorithm and finite element program for large elastoplastic deformation of damage materinls are finished.Finally they has been applied to the analysis of the necking of tensile cylinder specimen.Thecomparison between the calculated results and the experimental data show satisfactory agreement.
出处
《重庆大学学报（自然科学版）》
CAS
CSCD
1996年第3期1-8,共8页
Journal of Chongqing University
基金
国家自然科学基金
关键词
损伤演化
损伤本构方程
混合强化
材料
s:damase evolution
damage conatitutive equation
mixed hardering
