GNDs in nonlocal plasticity theories: lessons from discrete dislocation simulations

被引：19
|
作者：
Vand der Giessen, E
Needleman, A
机构：
[1] Univ Groningen, Dept Appl Phys, NL-9747 AG Groningen, Netherlands
[2] Brown Univ, Div Engn, Providence, RI 02912 USA
来源：
SCRIPTA MATERIALIA | 2003年 / 48卷 / 02期
关键词：
dislocation theory; mechanical properties; plastic deformation; micro-mechanical modeling; strain gradient plasticity;
D O I：
10.1016/S1359-6462(02)00332-9
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Solutions to simple boundary value problems using discrete dislocation plasticity exhibit key features associated with an accumulation of geometrically necessary dislocations: size effects and long-range stresses. Comparisons of the predictions of nonlocal plasticity theories with the discrete dislocation results provide an assessment of the strengths and weaknesses of various phenomenological theories and also provide a means of identifying appropriate nonlocal boundary conditions. (C) 2002 Published by Elsevier Science Ltd. on behalf of Acta Materialia Inc.
引用
收藏
页码：127 / 132
页数：6
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