How fast can cracks propagate?
How fast can cracks propagate?
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DOI：
10.1103/physrevlett.84.3113
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发表时间：
2000-04-03
影响因子：
8.6
通讯作者：
Gao, HJ
中科院分区：
文献类型：
--
作者：
Abraham, FF;Gao, HJ
我们用原子模拟的方法研究了裂纹沿着弱界面的扩展。模拟结果表明，一个模式II剪切为主的裂纹可以加速到瑞利波的速度，然后成核一个intersonic子，在纵向波的速度。这与一般认为裂纹的传播速度不能超过瑞利速度的观点相矛盾。
We have performed atomic simulations of crack propagation along a weak interface joining two harmonic crystals. The simulations show that a mode II shear dominated crack can accelerate to the Rayleigh wave speed and then nucleate an intersonic daughter that travels at the longitudinal wave speed. This contradicts the general belief that a crack can travel no faster than the Rayleigh speed.