Si-e Effects on Tension Properties of Silver Nanorod

doi:10.7652/xjtuxb200601024

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Si-e Effects on Tension Properties of Silver Nanorod

更新时间：2025-07-09

- Si-e Effects on Tension Properties of Silver Nanorod
- Vol. 40, Issue 1, Pages: 101-0105(2006)
- 作者机构：
  
  西安交通大学机械工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb200601024
  CLC： O313;TB383
- Online First：10 January 2006，
  
  Published：2006
- 稿件说明：
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Si-e Effects on Tension Properties of Silver Nanorod[J]. 2006, 40(1): 101-0105.
DOI：

Si-e Effects on Tension Properties of Silver Nanorod[J]. 2006, 40(1): 101-0105. DOI： 10.7652/xjtuxb200601024.

摘要

采用分子动力学方法研究了圆柱纳米银杆沿[ 001 ]晶向单向拉伸时的力学特性

纳米银杆 拉伸时所表现出的特性与其宏观特性基本一致. 拉伸过程分为弹性变形和塑性延展2 个阶段:在弹 性变形阶段

应力随应变的增大呈线性增大;在塑性延展阶段

应力则表现出反复振荡

系统由一种 结构经错动、滑移演化为另一种结构

是造成此种现象的一个重要原因. 研究结果表明

随纳米银杆 整体尺寸的增大

纳米杆的弹性模量增大、弹性极限应力减小

并都随整体尺寸的增大而趋于宏观 值. 随着纳米杆单方向的减小

纳米银杆的弹性模量和弹性极限应力均有不同程度的增加

并不随 单方向的增加表现出趋于宏观值的一致规律.

Abstract

The mechanical characteristics of silver nanorod subjected to [ 001 ] uniaxial tensile st rain are simulated with molecular dynamics. The tension p roperties of nanorod are similar to t hat of macroscopic material . The st ress increases linearly as st rain grows wit hin t he process of e2 lastic deformation

and t he dislocations and slip s of st ruct ure lead to a st ress oscillation during t he process of plastic elongation. The influences of si-e effect s are investigated simultaneously. Young-s modulus heightens and t he elastic ultimate st ress decreases wit h t he increasing global si-e of nanorod. Bot h of them approach to that of macroscopic material as t he global si-e increa2 ses

and Young-s modulus is enhanced wit h t he reducing unidirectional si-e

e. g.

the height of nanorod

while t he elastic ultimate st ress increases slightly. Thus t he increment of unidirectional si-e unables t he tension properties to coincide w

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