Attractive and repulsive cracks in a heterogeneous material

Abstract : We study experimentally the paths of an assembly of cracks growing in interaction in a heterogeneous two-dimensional elastic brittle material submitted to uniaxial stress. For a given initial crack assembly geometry, we observe two types of crack path. The first one corresponds to a repulsion followed by an attraction on one end of the crack and a tip to tip attraction on the other end. The second one corresponds to a pure attraction. Only one of the crack path type is observed in a given sample. Thus, selection between the two types appears as a statistical collective process.
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Pierre-Philippe Cortet, Guillaume Huillard, Loïc Vanel, Sergio Ciliberto. Attractive and repulsive cracks in a heterogeneous material. Journal of Statistical Mechanics: Theory and Experiment, IOP Publishing, 2008, 2008 (10), ⟨10.1088/1742-5468/2008/10/P10022⟩. ⟨ensl-00299089v2⟩

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