Journal
SCIENCE
Volume 299, Issue 5603, Pages 89-92Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1079312
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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.
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