波动在二维玻璃屈服转变中的作用

M. Ozawa, L. Berthier, G. Biroli, G. Tarjus
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引用次数: 16

摘要

通过交换蒙特卡罗模拟,我们对二维玻璃的屈服进行了数值研究,该玻璃具有非常广泛的稳定性,然后在零温度下缓慢变形。我们提供了强有力的数值证据,证明稳定玻璃是通过热力学极限的非平衡不连续转变产生的。在不太稳定的玻璃中观察到的脆性屈服与延展性屈服之间存在一个临界点。我们发现二维玻璃的产量与三维玻璃相似,但显示出更大的样品到样品的无序诱导波动,更强的有限尺寸效应,以及观察到的剪切带的更粗糙的空间漫游。这些发现有力地约束了有效的屈服理论。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Role of fluctuations in the yielding transition of two-dimensional glasses
We numerically study yielding in two-dimensional glasses which are generated with a very wide range of stabilities by swap Monte-Carlo simulations and then slowly deformed at zero temperature. We provide strong numerical evidence that stable glasses yield via a nonequilibrium discontinuous transition in the thermodynamic limit. A critical point separates this brittle yielding from the ductile one observed in less stable glasses. We find that two-dimensional glasses yield similarly to their three-dimensional counterparts but display larger sample-to-sample disorder-induced fluctuations, stronger finite-size effects, and rougher spatial wandering of the observed shear bands. These findings strongly constrain effective theories of yielding.
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