Molecular Dynamics Simulation of the Intersecting Cracks Propagation Behavior in Aluminum

Fang Zhou; Liu Xiaobo; Xu Qingjun

doi:10.15980/j.tzzz.2016.01.027

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Molecular Dynamics Simulation of the Intersecting Cracks Propagation Behavior in Aluminum
Vol. 36, Issue 1, Pages: 99-103(2016)
Published： 2016 ，
DOI： 10.15980/j.tzzz.2016.01.027

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[1]方洲,刘晓波,徐庆军.铝中相交裂纹扩展行为的分子动力学模拟[J].特种铸造及有色合金,2016,36(01):99-103.

Fang Zhou, Liu Xiaobo, Xu Qingjun. Molecular Dynamics Simulation of the Intersecting Cracks Propagation Behavior in Aluminum. [J]. Special Casting & Nonferrous Alloys 36(1):99-103(2016)
[1]方洲,刘晓波,徐庆军.铝中相交裂纹扩展行为的分子动力学模拟[J].特种铸造及有色合金,2016,36(01):99-103. DOI： 10.15980/j.tzzz.2016.01.027.

Fang Zhou, Liu Xiaobo, Xu Qingjun. Molecular Dynamics Simulation of the Intersecting Cracks Propagation Behavior in Aluminum. [J]. Special Casting & Nonferrous Alloys 36(1):99-103(2016) DOI： 10.15980/j.tzzz.2016.01.027.

摘要

建立了铝中相交裂纹的分子动力学模型

通过嵌入原子法进行模拟

采用速度加载的分子动力学方法研究了含相交裂纹的铝裂纹扩展行为。通过观察不同时刻的原子轨迹图和能量演变曲线图来研究相交裂纹扩展和演变行为。结果表明

加载速度增大

促进了角度裂纹的扩展。随着角度裂纹的夹角增大

角度裂纹就越难扩展并且扩展路径更加复杂。

Abstract

A molecular dynamics simulation model of aluminum with intersecting cracks was builted up.The crack propagation behaviors of intersecting cracks in aluminum were analyzed by using the embedded atom method and the rate loading molecular dynamics method.The atomic trajectories and energy evolution curves at different time were used to analyze the behaviors and evolution of the intersecting cracks.The results show that the increase of loading speed play apositive role in promoting the angle crack extension.With the angle of cracks increases

the angle crack is more difficult to expand and the extend path exhibits more complicated.