Crackling dynamics in material failure as the signature of a self-organized dynamic phase transition
Crackling dynamics in material failure as the signature of a self-organized dynamic phase transition
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DOI：
10.1103/physrevlett.101.045501
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发表时间：
2008-07-25
影响因子：
8.6
通讯作者：
Ponson, L.
中科院分区：
文献类型：
--
作者：
Bonamy, D.;Santucci, S.;Ponson, L.
我们在这里推导出异质材料中缓慢裂纹扩展的线弹性随机描述。这种方法成功地定量地再现了最近在裂纹沿着透明有机玻璃块的弱异质平面缓慢传播期间观察到的间歇性裂纹动力学[K.J.马洛伊等人，物理学。莱特牧师。 96, 045501 (2006)]。在本描述中，异质介质的准静态失效表现为自组织临界相变。因此，它表现出普遍且在某种程度上可预测的标度定律，类似于其他系统，例如铁磁体中的磁化噪声。
We derive here a linear elastic stochastic description for slow crack growth in heterogeneous materials. This approach succeeds in reproducing quantitatively the intermittent crackling dynamics observed recently during the slow propagation of a crack along a weak heterogeneous plane of a transparent Plexiglas block [K.J. Maloy et al., Phys. Rev. Lett. 96, 045501 (2006)]. In this description, the quasistatic failure of heterogeneous media appears as a self-organized critical phase transition. As such, it exhibits universal and to some extent predictable scaling laws, analogous to that of other systems such as, for example, magnetization noise in ferromagnets.