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arXiv 1206.7033cond-mat.stat-mechphysics.geo-ph
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噪声诱发破裂过程:相边界和等待时间分布的标度

Noise induced rupture process: Phase boundary and scaling of waiting time distribution

Srutarshi Pradhan, Anjan Kumar Chandra, Bikas K. Chakrabarti

摘要:

纤维束在这里被认为是复合材料的模型,其中由于施加的载荷(应力)和外部噪声的综合影响而发生纤维断裂。通过数值模拟和平均场计算,我们表明,存在一个强大的连续(无等待时间)和间歇压裂制度之间的相边界。在间歇状态下,在整个破裂过程中产生不同大小的雪崩,并且在两个连续的雪崩之间有一个等待时间。等待时间的统计数据遵循伽马分布,雪崩分布显示幂律缩放,类似于在断裂实验中观察到的地震事件和突发事件。我们提出了一个预测方案,可以告诉当系统预计达到连续压裂点从间歇阶段。

英文摘要:

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 and bursts in fracture experiments. We propose a prediction scheme that can tell when the system is expected to reach the continuous fracturing point from the intermittent phase.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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