Avalanche Size Scaling in Sheared Three-Dimensional Amorphous Solid

Details Avalanche Size Scaling in Sheared Three-Dimensional Amorphous Solid Avalanche Size Scaling in Sheared Three-Dimensional Amorphous Solid

2007-02-20

arxiv.org/abs/cond-mat/0702454v1

Physics

Condensed Matter

Materials Science

Accepted for publication in Physical Review Letters

Scientific paper

We have studied the statistics of plastic rearrangement events in a simulated amorphous solid at T=0. Events are characterized by the energy release and the ``slip volume'', the product of plastic strain and system volume. Their distributions for a given system size $L$ appear to be exponential, but a characteristic event size cannot be inferred, because the mean values of these quantities increase as $L^{\alpha}$ with $\alpha \sim 3/2$. In contrast to results obtained in 2D models, we do not see simply connected avalanches. The exponent suggests a fractal shape of the avalanches, which is also evidenced by the mean fractal dimension and participation ratio.

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