Micro-pillar plasticity: 2.5D mesoscopic simulations

被引：45

作者：

Benzerga, A. Amine ^{[1
]}

机构：

[1] Texas A&M Univ, Dept Aerosp Engn, College Stn, TX 77843 USA

来源：

JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS | 2009年 / 57卷 / 09期

基金：

美国国家科学基金会;

关键词：

Dislocations; Crystal plasticity; Size effects; Finite elements; Dislocation dynamics; MECHANICAL-PROPERTIES; CRYSTAL PLASTICITY; SINGLE-CRYSTALS; GRADIENT THEORY; FRANK-READ; DISLOCATION; SCALE; DEFORMATION; MICROSTRUCTURE; COMPRESSION;

D O I：

10.1016/j.jmps.2009.06.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The plastic behavior of micro- and nano-scale crystalline pillars is investigated under nominally uniform compression. The transition from forest hardening to exhaustion hardening dominated behavior is shown to emerge from discrete dislocation dynamics simulations upon reduction in the initial source density. The analyses provide new insight into the scaling of flow stress with specimen size and also highlight the connection between individual dislocation mechanisms, collective phenomena and overall behavior. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1459 / 1469

页数：11

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