Crack healing in nanocrystalline palladium

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• 作者：Guoqiang Xu^a ; Michael J. Demkowicz^a ; ^b ; ^{demkowicz@tamu.edu" class="auth_mail" title="E-mail the corresponding author}
• 刊名：Extreme Mechanics Letters
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：8
• 期：Complete
• 页码：208-212
• 全文大小：1677 K

文摘

We present molecular dynamics simulations that demonstrate crack healing induced by external mechanical loading in three-dimensional models of nanocrystalline palladium. This behavior is due to the interaction of a crack with internal stresses in the surrounding microstructure. Our observations illustrate the importance of accounting for microstructurally-induced internal stresses when predicting the behavior of nano-scale cracks under mechanical loading. They also motivate further work to determine whether internal damage in hard matter may be mitigated by designing microstructures that heal cracks during mechanical loading.