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arXiv 1305.7124cond-mat.stat-mech
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局部负荷分担纤维束模型中的自组织动力学

Self-organized dynamics in local load sharing fiber bundle models

Soumyajyoti Biswas, Bikas K. Chakrabarti

摘要:

本文研究了局部载荷分担纤维束模型在单点外载荷作用下的二维动力学行为。由于局部载荷分担的性质,重新分布的载荷保持沿着断裂补片的边界局部化。然后,系统进入自组织状态,沿着破损补丁(受损区域)的(增加)边界,每根纤维的负载的平均值是固定的,并且观察到雪崩大小和其他相关量的无标度分布。特别是,当载荷重新分布仅在最近的幸存纤维中时,指数值的数值估计与Manna模型的数值估计相当。当负载的重新分配是均匀的补丁边界,该模型显示了一个简单的平均场的限制,这种自组织的临界行为,我们给出了分析估计的饱和负载每纤维值和雪崩尺寸分布指数。这与数值模拟结果吻合较好。

英文摘要:

We study the dynamics of a local load sharing fiber bundle model in two dimensions, under an external load (which increases with time at a fixed slow rate) applied at a single point. Due to the local load sharing nature, the redistributed load remains localized along the boundary of the broken patch. The system then goes to a self-organized state with a stationary average value of load per fiber along the (increasing) boundary of the broken patch (damaged region) and a scale free distribution of avalanche sizes and other related quantities are observed. In particular, when the load redistribution is only among nearest surviving fiber(s), the numerical estimates of the exponent values are comparable with those of the Manna model. When the load redistribution is uniform along the patch boundary, the model shows a simple mean-field limit of this self-organizing critical behaviour, for which we give analytical estimates of the saturation load per fiber values and avalanche size distribution exponent. These are in good agreement with numerical simulation results.

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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