Pattern formation and selection in quasistatic fracture
Pattern formation and selection in quasistatic fracture
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DOI：
10.1103/physrevlett.85.662
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发表时间：
2000-07-17
影响因子：
8.6
通讯作者：
Néda, Z
中科院分区：
文献类型：
--
作者：
Leung, K;Néda, Z
用离散弹簧-块体模型研究了准静态驱动系统的断裂问题。从密切比较干燥实验，它描述了裂纹的形成引起的基板上的摩擦。该模型产生的细胞，分层模式的裂缝，其特征在于由一个平均的碎片尺寸线性层厚度，与实验一致。利用裂解前的相关性解释了固定碎片尺寸的选择。的缩放行为与厚度和衬底耦合，推导和证实的模拟，表明为什么图案具有相似的形态，尽管他们的差距尺度。
Fracture in quasistatically driven systems is studied by means of a discrete spring-block model. Developed from close comparison with desiccation experiments, it describes crack formation induced by friction on a substrate. The model produces cellular, hierarchical patterns of cracks, characterized by a mean fragment size linear in the layer thickness, in agreement with experiments. The selection of a stationary fragment size is explained by exploiting the correlations prior to cracking. A scaling behavior associated with the thickness and substrate coupling, derived and confirmed by simulations, suggests why patterns have similar morphology despite their disparity in scales.