The analysis of sheer banding with a dislocation based gradient plasticity model

被引：27
作者：
Sluys, LJ
Estrin, Y
机构：
[1] Delft Univ Technol, Dept Civil Engn & Geosci, NL-2600 GA Delft, Netherlands
[2] Univ Western Australia, Dept Mech & Mat Engn, Nedlands, WA 6907, Australia
来源：
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES | 2000年 / 37卷 / 46-47期
关键词：
shear banding; plasticity model; dislocation;
D O I：
10.1016/S0020-7683(99)00331-5
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
A microstructural approach to the incorporation of gradient terms in a single crystal plasticity theory is discussed. A diffusion term that represents cross-slip of dislocations is included in the evolution equations for dislocation densities. A coupling between microscale and macroscale is provided by the dislocation based gradient plasticity model. An algorithmic treatment of the model is given. The effect of the diffusion-like term in the constitutive relation on the resulting formation of localized shear modes is studied. An analysis of a plane strain strip in tension oriented for multiple slip is presented. The effect of the dislocation 'diffusivity' on the shear band thickness is analysed. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：7127 / 7142
页数：16
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