arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1606.08779cond-mat.stat-mechcond-mat.soft
收藏

纤维束中的界面传播:局域、平均场和中程相关统计

Interface propagation in fiber bundles: Local, mean-field and intermediate range-dependent statistics

Soumyajyoti Biswas, Lucas Goehring

摘要:

纤维束模型本质上是一组元件,当施加足够的载荷时,这些元件会断裂。局部加载机制,这可以作为一个模型的一个一维界面分离的破碎和未破碎的部分,一个固体在模式I断裂。界面可以通过系统传播,这取决于加载速率和纤维失效阈值中存在的无序。在存在准静态驱动的情况下,界面的间歇动力学模仿无序介质中的前沿传播。这种情况出现在不同的物理系统,如模式-I裂纹的传播,畴壁动力学在磁铁,电荷密度波,接触线润湿等,我们研究的相互作用的范围,即附近的界面受影响的局部扰动后,统计的间歇性动态的前面的效果。随着相互作用范围的扩大,存在着从局部到全局行为的交叉,而在中间范围则存在着不断变化的“普遍性”。这意味着相互作用范围是任何结果物理学的相关参数。这是特别相关的事实,即有一个分散的指数的实验观察,甚至在理想化的实验上的骨折前线,也有可能在实际样品中改变的相互作用范围。

英文摘要:

The fiber bundle model is essentially an array of elements that break when sufficient load is applied on them. With a local loading mechanism, this can serve as a model for a one-dimensional interface separating the broken and unbroken parts of a solid in mode-I fracture. The interface can propagate through the system depending on the loading rate and disorder present in the failure thresholds of the fibers. In the presence of a quasi-static drive, the intermittent dynamics of the interface mimic front propagation in disordered media. Such situations appear in diverse physical systems such as mode-I crack propagation, domain wall dynamics in magnets, charge density waves, contact line in wetting etc. We study the effect of the range of interaction, i.e. the neighborhood of the interface affected following a local perturbation, on the statistics of the intermittent dynamics of the front. There exists a crossover from local to global behavior as the range of interaction grows and a continuously varying `universality' in the intermediate range. This means that the interaction range is a relevant parameter of any resulting physics. This is particularly relevant in view of the fact that there is a scatter in the experimental observations of the exponents, in even idealized experiments on fracture fronts, and also a possibility in changing the interaction range in real samples.

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。

↑