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Three-Dimensional Mapping of Dislocation Avalanches: Clustering and Space/Time Coupling

Abstract : There is growing evidence for the complex, intermittent, and heterogeneous character of plastic flow. Here we report a three-dimensional mapping of dislocation avalanches during creep deformation of an ice crystal, from a multiple-transducers acoustic emission analysis. Correlation analysis shows that dislocation avalanches are spatially clustered according to a fractal pattern and that the closer in time two avalanches are, the larger the probability is that they will be closer in space. Such a space/time coupling may contribute to the self-organization of the avalanches into a clustered pattern.
Keywords : MAT SCI
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Submitted on : Saturday, March 12, 2022 - 5:51:39 PM
Last modification on : Sunday, March 13, 2022 - 3:26:21 AM

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Jérôme Weiss, David Marsan. Three-Dimensional Mapping of Dislocation Avalanches: Clustering and Space/Time Coupling. Science, 2003, 299, pp.89-92. ⟨10.1126/science.1079312⟩. ⟨insu-03607115⟩

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