Srutarshi Pradhan, Anjan K. Chandra, Bikas K. Chankrabarti
A bundle of fibers has been considered here as a model for composite materials, where breaking of the fibers occur due to a combined influence of applied load (stress) and external noise. Through numerical simulation and a mean-field calculation we show that there exists a robust phase boundary between continuous (no waiting time) and intermittent fracturing regimes. In the intermittent regime, throughout the entire rupture process avalanches of different sizes are produced and there is a waiting time between two consecutive avalanches. The statistics of waiting times follows a Gamma distribution and the avalanche distribution shows power law scaling - similar to what have been observed in case of earthquake events. This suggests that noise induced intermittent rupture process might be the true origin of typical scaling in waiting times and avalanches, independent of the length scale involved.
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http://arxiv.org/abs/1206.7033
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