Annealing and rejuvenation in a two-dimensional model amorphous solid under oscillatory shear.,Physical Review E

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Annealing and rejuvenation in a two-dimensional model amorphous solid under oscillatory shear.
Physical Review E ( IF 2.2 ) Pub Date : 2020-01-01 , DOI: 10.1103/physreve.101.012603
Eden Schinasi-Lemberg ₁ , Ido Regev ₁

Affiliation

We study the annealing and rejuvenation behavior of a two-dimensional amorphous solid model under oscillatory shear. We show that, depending on the cooling protocol used to create the initial configuration, the mean potential energy can either decrease or increase under subyield oscillatory shear. For post-yield oscillatory shear, the mean potential energy increases and is independent on the initial conditions. We explain this behavior by modeling the dynamics using a simple model of forced dynamics on a random energy landscape and show that the model reproduces the qualitative behavior of the mean potential energy and mean-square displacement observed in the particle based simulations. This suggests that some important aspects of the dynamics of amorphous solids can be understood by studying the properties of random energy landscapes and without explicitly taking into account the complex real-space interactions which are involved in plastic deformation.

中文翻译：

二维模型无定形固体在振荡剪切作用下的退火和回春。

我们研究了二维非晶态固体模型在振荡剪切作用下的退火和回春行为。我们表明，根据用于创建初始配置的冷却协议，在次屈服振荡剪切下，平均势能可以减小或增大。对于屈服后的振荡剪切，平均势能增加并且与初始条件无关。我们通过使用简单的动力学模型在随机能量图上对动力学进行建模来解释这种行为，并表明该模型再现了在基于粒子的模拟中观察到的平均势能和均方位移的定性行为。

更新日期：2020-01-15

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