摘要
本文利用修正的 Gurson 塑性势和有限变形理论,建立了有限变形下韧性损伤的弹塑性有限元方程,并给出了一种孔洞体积分数率的演化模型.利用数值方法,详细地研究了缺口试棒的缺口曲率半径对其损伤分布和破坏形式以及应力三轴度的影响.
Elastoplastic finite element formulation of ductile damage under
finite deformation is established by means of the modified Gurson's plastic
potential theory.An evolutionary model of void volume fraction is also
suggested.By using the numerical mathod,the effects of the curvature radius
of the notched specimen on damage distribution,as well as the rupture form
and stress triaxiality are researched in detail.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
1990年第5期97-106,共10页
Journal of Shanghai Jiaotong University
基金
国家自然科学资助项目
关键词
材料
韧性损伤
细观力学
Gurson's plastic potential
ductile damage
stress triaxiality
void volume fraction
