Nonlinear elastic response of single crystal Cu under uniaxial loading by molecular dynamics study

被引：25

作者：

Zhang, Liang ^{[1
]}

Lu, Cheng ^{[1
]}

Anh Kiet Tie ^{[1
]}

机构：

[1] Univ Wollongong, Sch Mech Mat & Mechatron Engn, Wollongong, NSW 2522, Australia

来源：

MATERIALS LETTERS | 2018年 / 227卷

基金：

澳大利亚研究理事会;

关键词：

Molecular dynamics; Elastic properties; Nonlinear response; Yield asymmetry; HOMOGENEOUS DISLOCATION NUCLEATION; TENSION-COMPRESSION ASYMMETRY; STRENGTH ASYMMETRY; MECHANICAL-BEHAVIOR; ORIENTATION; METALS; NI;

D O I：

10.1016/j.matlet.2018.05.094

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Molecular dynamics simulations were carried out to study the mechanical response of single crystal Cu with various orientations under uniaxial loading. Cu shows a high degree of elastic anisotropy as a function of the crystal orientations, and the yield stress varies significantly with the crystal orientations and the loading directions. An obvious nonlinear stress-strain response was observed at the elastic deformation stage under applied loading, namely elastic hardening and elastic softening. This nonlinear elastic behavior is derived from the potential energy between atoms and can play a significant role in yield stress and yield asymmetry of crystals under tension and compression. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：236 / 239

页数：4

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