有限变形下的等效应力和等效应变问题  

Effective Stress and Strain in Finite Deformation

作　　者：周喆[1] 秦伶俐[1] 黄文彬[1] 王红卫[1] 

机构地区：[1]中国农业大学应用力学研究所,北京100083

出　　处：《应用数学和力学》2004年第5期542-550,共9页Applied Mathematics and Mechanics

摘　　要：　重点讨论了在有限变形条件下,弹塑性理论中的等效应力、等效应变是否仍然成立·　选择了平面应力和平面应变下的单向压缩应力状态,对这一问题进行了探讨·　在这两种应力状态下,在众多的应力应变描述中。Whether the concept of effective stress and strain in elastic-plastic theory is still valid under the condition of finite deformation was mainly discussed. The uni-axial compression experiments in plane stress and plane strain states were chosen for study. In the two kinds of stress states, the stress-strain curve described by logarithm strain and rotated Kirchhoff stress matches the experiments data better than the curves defined by other stress-strain description.

关 键 词：有限变形 塑性本构 等效应力 等效应变 体积不可压缩 

分 类 号：O344[理学—固体力学]