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arXiv 1209.2569cond-mat.stat-mech
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一维和二维非均质纤维束模型的交叉行为

Crossover behaviors in one and two dimensional heterogeneous load sharing fiber bundle models

Soumyajyoti Biswas, Bikas K. Chakrabarti

摘要:

本文研究了纤维束断裂模型中的非均匀载荷分担效应。该系统被分为两组光纤(部分$p$和$1-p$),其中一组遵循完全本地负载分担机制,另一组遵循全局负载分担机制。装载板中的局部紊乱(薄弱)补丁可能会导致系统中出现这种情况。我们发现,在2D的有限交叉(全球和本地负载共享行为之间)点出现在一个有限的值的无序浓度(附近$p_c\sim 0.53$),这是略低于网站的渗流阈值。我们数值确定的相图(在1D和2D),并确定以下$p_c$的平均场行为(完全全球负载共享)的两个维度的临界行为。这种交叉可能是由于加载板中的几何渗透障碍而发生的。我们还展示了临界点如何依赖于加载历史,这被确定为一个特殊的本地负载分配属性。

英文摘要:

We study the effect of heterogeneous load sharing in the fiber bundle models of fracture. The system is divided into two groups of fibers (fraction $p$ and $1-p$) in which one group follow the completely local load sharing mechanism and the other group follow global load sharing mechanism. Patches of local disorders (weakness) in the loading plate can cause such a situation in the system. We find that in 2d a finite crossover (between global and local load sharing behaviours) point comes up at a finite value of the disorder concentration (near $p_c\sim 0.53$), which is slightly below the site percolation threshold. We numerically determine the phase diagrams (in 1d and 2d) and identify the critical behavior below $p_c$ with the mean field behavior (completely global load sharing) for both dimensions. This crossover can occur due to geometrical percolation of disorders in the loading plate. We also show how the critical point depends on the loading history, which is identified as a special property of local load sharing.

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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