Origin of reversible and irreversible atomic-scale rearrangements in a model two-dimensional network glass
Origin of reversible and irreversible atomic-scale rearrangements in a model two-dimensional network glass
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DOI：
10.1103/physreve.102.033006
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发表时间：
2020-09-28
影响因子：
2.4
通讯作者：
Markert, Bernd
中科院分区：
文献类型：
--
作者：
Ebrahem, Firaz;Bamer, Franz;Markert, Bernd
在这篇文章中，我们研究了模型二维网络玻璃中塑性的基本机制。通过使用Monte Carlo键切换算法生成的玻璃，并进行非热简单剪切变形，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的原子尺度重排的拓扑起源。结果表明，在加载过程中触发的一些事件在卸载过程中恢复，而有些则没有。因此，观察到两种基本的塑性事件，这可以链接到模型玻璃的网络拓扑结构。
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.