Crystal instabilities at finite strain.
Crystal instabilities at finite strain.
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DOI：
10.1103/physrevlett.71.4182
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发表时间：
1993-12
影响因子：
8.6
通讯作者：
Jinghan Wang;Sidney Yip;S. Phillpot;D. Wolf
中科院分区：
文献类型：
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作者：
Jinghan Wang;Sidney Yip;S. Phillpot;D. Wolf
结果表明，使用控制有限变形下的应力-应变关系的弹性刚度系数导出的稳定性标准可以定量预测晶体不稳定性，正如在直接分子动力学模拟中观察到的那样。借助此类分析，我们发现不稳定因素可能会连续触发；因此，可以预测无缺陷晶体过热时亚稳态的极限。
It is demonstrated that stability criteria derived using elastic stiffness coefficients which govern stress-strain relations at finite deformation give quantitative predictions of crystal instability, as observed in direct molecular dynamics simulations. With the aid of such analysis we show that instabilities can be triggered in succession; as a consequence, the limit of metastability in the superheating of a defect-free crystal can be predicted.