Statistical aspects of discrete dislocation plasticity

被引：7

作者：

Needleman, A ^{[1
]}

Van der Giessen, E

Deshpande, VS

机构：

[1] Brown Univ, Div Engn, Providence, RI 02912 USA

[2] Univ Groningen, Dept Appl Phys, NL-9747 AG Groningen, Netherlands

[3] Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England

来源：

SCRIPTA MATERIALIA | 2006年 / 54卷 / 05期

基金：

美国国家科学基金会;

关键词：

dislocation; theory; micromechanical modeling;

D O I：

10.1016/j.scriptamat.2005.10.051

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Discrete dislocation calculations suggest that statistical effects are important in the modeling of crystal plasticity. These include: (i) effects of source limited plasticity; (ii) statistical variations of dislocation sources and obstacles in small volumes; and (iii) the sensitivity of the discrete dislocation predictions to small perturbations. Implications of these for phenomenological constitutive models and for statistical theories of the collective behavior of dislocations are discussed. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：729 / 733

页数：5

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