爆炸与冲击2012，Vol.32Issue(1)：8-14,7.
应力三轴度的有限元计算修正
Updating of the stress triaxiality by finite element analysis
摘要
Abstract
The stress triaxiality is the most important factor that controls initiation of ductile fracture, besides the strain level. Quasi-static tensile tests on smooth and notched specimens of high strength steel were carried out, and numerical simulations of the tests were performed using finite element code ABAQUS. Based on the experimental and numerical results, some material parameters of the Johnson-Cook constitutive model and the fracture model were obtained. Finally, rectangular plates made of the high strength steel were collided by dropping punch, and numerical simulations were performed u-sing the Johnson-Cook model obtained previously. Good agreements were found between the tests and the numerical results, which illustrated that it was reliable to update the stress triaxiality by numerical simulations of tensile tests.关键词
固体力学/应力三轴度/有限元/拉伸实验Key words
solid mechanics/ stress triaxiality/ finite element analysis/ tensile experiments分类
数理科学引用本文复制引用
谢凡,张涛,陈继恩,刘土光..应力三轴度的有限元计算修正[J].爆炸与冲击,2012,32(1):8-14,7.基金项目
国家自然科学基金项目(10702022) （10702022）
