Geometrically necessary dislocations, hardening, and a simple gradient theory of crystal plasticity

被引：48

作者：

Acharya, A ^{[3
]}

Bassani, JL

Beaudoin, A

机构：

[1] Univ Penn, Philadelphia, PA 19104 USA

[2] Univ Illinois, Urbana, IL 61801 USA

[3] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

来源：

SCRIPTA MATERIALIA | 2003年 / 48卷 / 02期

基金：

美国国家科学基金会;

关键词：

gradient plasticity; crystal plasticity; lattice incompatibility; work hardening; boundary conditions;

D O I：

10.1016/S1359-6462(02)00337-8

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Geometrically necessary dislocations (GNDs) and incompatible lattice deformations are directly related and characterized by a gradient of the elastic distortion. This measure of GND density can play a natural role in non-local theories of plasticity. Issues concerning hardening and boundary conditions are addressed in the setting of a simple theory. (C) 2002 Published by Elsevier Science Ltd. on behalf of Acta Materialia Inc.

引用

页码：167 / 172

页数：6

共 32 条

[1] Grain-size effect in viscoplastic polycrystals at moderate strains [J].