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arXiv 1202.2553cond-mat.dis-nncond-mat.mtrl-scicond-mat.stat-mech
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纤维束模型中猝发分布的演化

Evolution of burst distribution in fiber bundle model

I. V. Bezsudnov, A. A. Snarskii

摘要:

我们考虑一个纤维束模型,具有相等的负载分担和均匀分布的击穿阈值。采用统一的概率论方法描述了连续和离散载荷作用下的纤维束。结果表明,尺寸为d的雪崩分布D(d)与束载荷步数之比正好对应于尺寸为d的破裂概率。研究了D(d)的s -幂律分布指数随加载步长和束尺寸的变化规律。结果表明,s不依赖于束的大小。在数值实验中,得到了纤维束尺寸N=10^10时s对加载步长的依赖关系。通过数值模拟,得到了各加载阶段纤维破裂的分布规律。结果表明,这种分布类型的变化是s值在-3 - -5/2范围内演变的原因。

英文摘要:

We consider a fiber bundle model with a equal load sharing and uniformly distributed breakdown thresholds. A unified probability-theoretic approach was used to describe bundle under continuous and discrete load increase. It was shown that the ratio of distribution D(d) of avalanches of sizes d to the number of bundle load steps exactly corresponds to burst probability of size d. Evolution of s - power law distribution exponent of D(d) was studied as a function of loading step and bundle size. It was shown that s does not depend on bundle size. In the numerical experiment, dependence s on loading step was obtained with fiber bundle size up to N=10^10. The regions of s values constancy and the transition region were found. A distribution of fiber bursts on each loading step was recovered in the numerical simulations. It was shown that a change in the type of this distribution is the reason for evolution of s values in the range of -3 - -5/2.

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