Where, and How, Does a Nanowire Break?

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• 作者：Dongxu Wang ; Jianwei Zhao ; Shi Hu ; Xing Yin ; Shuai Liang ; Yunhong Liu ; Shengyuan Deng
• 刊名：Nano Letters
• 出版年：2007
• 出版时间：May 2007
• 年：2007
• 卷：7
• 期：5
• 页码：1208 - 1212
• 全文大小：308K
• 年卷期：v.7,no.5(May 2007)
• ISSN：1530-6992

文摘

Using molecular dynamics (MD) simulation, we studied the structural transformation and breaking mechanism of a single crystalline coppernanowire under continuous strain. At a certain strain rate, an ensemble of relaxed initial states of the nanowire can preferentially go throughone or more paths of deformation. In each deformation path, disordered atoms can be generated at the specific positions of the nanowire,where necking and breaking take place afterward. Such a breaking position is not predetermined; multiple initial states lead to a strain-rate-dependent, statistical distribution of breaking positions.