Analysis of crack tip plasticity for microstructurally small cracks using crystal plasticity theory

被引：40
|
作者：
Potirniche, GP [1 ]
Daniewicz, SR [1 ]
机构：
[1] Mississippi State Univ, Dept Mech Engn, Mississippi State, MS 39762 USA
来源：
ENGINEERING FRACTURE MECHANICS | 2003年 / 70卷 / 13期
关键词：
crystal plasticity; small cracks; finite element analysis; crack tip plastic zone; crack tip opening displacement;
D O I：
10.1016/S0013-7944(02)00204-7
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Crack tip plastic zone sizes and crack tip opening displacements (CTOD) for stationary microstructurally small cracks are calculated using the finite element method. To simulate the plastic deformation occurring at the crack tip, a two-dimensional small strain constitutive relationship from single crystal plasticity theory is implemented in the finite element code ANSYS as a user-defined plasticity subroutine. Small cracks are modeled in both single grains and multiple grains, and different crystallographic conditions are considered. The computed plastic zone sizes and CTOD are compared with those found using conventional isotropic plasticity theory, and significant differences are observed. (C) 2002 Elsevier Science Ltd. All rights reserved.
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收藏
页码：1623 / 1643
页数：21
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