摘要
应用单轴应力状态下的弹粘塑性本构关系和J2 流动理论及等向强化准则建立起适用于多轴应力状态的普遍的弹粘塑性本构关系 ,并将其引入增率型虚功率原理建立了弹粘塑性有限元列式。用基于该组列式编制的大变形有限元程序对单拉过程和方盒件深拉延成形过程进行了数值模拟 ,并与单拉实验结果进行了比较。数值模拟结果表明 :本文建立的弹粘塑性材料的本构关系是有效的 ,同时说明根据增率型虚功率原理建立的弹粘塑性有限元列式可以有效地对弹粘塑性变形过程进行数值模拟。
A general elasto visco plastic(EVP) constitutive equation for multi axial stress state is established from uniaxial EVP equation,J2 flow theory and isotropic hardening criterion,and an EVP FEM is formulated by derived equation in connection with incremental virtual work principle.Large formation FEM code on the basis of formulation is used to simulate uniaxial drawing of a sheet metal specimen.Simulated processes are in good agreement with experiment.More complicated stamping of square box is also simulated with good results to confirm proposed formulation.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2002年第2期7-12,共6页
Journal of Jilin University:Engineering and Technology Edition
基金
国家自然科学基金资助重点项目 (19832 0 2 0 )
国家杰出青年科学基金资助项目 (10 12 5 2 0 8)
