Crack front waves and the dynamics of a rapidly moving crack.
Crack front waves and the dynamics of a rapidly moving crack.
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DOI：
10.1103/physrevlett.88.085503
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发表时间：
2001-07
影响因子：
8.6
通讯作者：
E. Sharon;G. Cohen;J. Fineberg
中科院分区：
文献类型：
--
作者：
E. Sharon;G. Cohen;J. Fineberg
裂纹前缘波是沿裂纹前缘沿着传播的非线性局域波。它们是由裂纹与局部材料不均匀性的相互作用和微分支的内在形成产生的。前波被示出传输能量，产生表面结构，并导致局部速度波动。它们的存在局部赋予惯性，这是不纳入目前的断裂理论，最初的“无质量”裂纹。这与微分支形成相耦合，在断裂表面结构内产生不均匀性和缩放行为。
Crack front waves are nonlinear localized waves that propagate along the leading edge of a crack. They are generated by both the interaction of a crack with a localized material inhomogeneity and the intrinsic formation of microbranches. Front waves are shown to transport energy, generate surface structure, and lead to localized velocity fluctuations. Their existence locally imparts inertia, which is not incorporated in current theories of fracture, to initially "massless" cracks. This, coupled to microbranch formation, yields both inhomogeneity and scaling behavior within the fracture surface structure.