MICROPOLAR ELASTOPLASTICITY AND ITS ROLE IN LOCALIZATION

被引：69

作者：

DIETSCHE, A ^{[1
]}

STEINMANN, P ^{[1
]}

WILLAM, K ^{[1
]}

机构：

[1] UNIV COLORADO,BOULDER,CO 80309

来源：

INTERNATIONAL JOURNAL OF PLASTICITY | 1993年 / 9卷 / 07期

关键词：

D O I：

10.1016/0749-6419(93)90053-S

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In this article we focus on micropolar elastoplasticity and the conditions for the formation of spatial discontinuities. After a brief review of micropolar kinematics and balance equations, an augmented localization tensor is developed for elastoplastic constitutive behavior that describes discontinuous bifurcation at the constitutive level. In this context an auxiliary condition is encountered that restricts the jump of the stress rate to remain symmetric across discontinuity surfaces of second order. The expanded localization conditions are studied with two constitutive models-micropolar RANKINE and micropolar VON MISES J2-flow theories of elastoplasticity-for which definite statements are derived with regard to their regularization properties.

引用

页码：813 / 831

页数：19