Origin of reversible and irreversible atomic-scale rearrangements in a model two-dimensional network glass
Firaz Ebrahem, Franz Bamer, Bernd Markert
Abstract
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.
Topics & Concepts
Atomic unitsPlasticityMaterials scienceDeformation (meteorology)Scale (ratio)Topology (electrical circuits)Shear (geology)Monte Carlo methodStatistical physicsComposite materialPhysicsMathematicsQuantum mechanicsStatisticsCombinatoricsMaterial Dynamics and PropertiesMetallic Glasses and Amorphous AlloysTheoretical and Computational Physics