Ebrahem Firaz, Bamer Franz, Markert Bernd
Institute of General Mechanics, RWTH Aachen University, 52062 Aachen, Germany.
Phys Rev E. 2020 Sep;102(3-1):033006. doi: 10.1103/PhysRevE.102.033006.
In this contribution, we investigate the fundamental mechanism of plasticity in a model two-dimensional network glass. The glass is generated by using a Monte Carlo bond-switching algorithm and subjected to athermal simple shear deformation, followed by subsequent unloading at selected deformation states. This enables us to investigate the topological origin of reversible and irreversible atomic-scale rearrangements. It is shown that some events that are triggered during loading recover during unloading, while some do not. Thus, two kinds of elementary plastic events are observed, which can be linked to the network topology of the model glass.
在本论文中，我们研究了一个二维网络玻璃模型中的塑性基本机制。该玻璃通过蒙特卡洛键切换算法生成，并经历非热简单剪切变形，随后在选定的变形状态下卸载。这使我们能够研究可逆和不可逆原子尺度重排的拓扑起源。结果表明，加载过程中触发的一些事件在卸载过程中恢复，而有些则不能。因此，观察到两种基本塑性事件，它们可以与模型玻璃的网络拓扑结构联系起来。
