Nonaffine rearrangements of atoms in deformed and quiescent binary glasses

Abstract

The influence of periodic shear deformation on nonaffine atomic displacements in an amorphous solid is examined via molecular dynamics simulations. We study the three-dimensional Kob-Andersen binary mixture model at a finite temperature. It is found that when the material is periodically strained, most of the atoms undergo repetitive nonaffine displacements with amplitudes that are broadly distributed. We show that particles with large amplitudes of nonaffine displacements are organized into compact clusters. With increasing strain amplitude, spatial correlations of nonaffine displacements become increasingly long-ranged, although they remain present even in a quiescent system due to thermal fluctuations.

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• Accelerated relaxation in disordered solids under cyclic loading with alternating shear orientation
• The influence of complex thermal treatment on mechanical properties of amorphous materials
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• Spatiotemporal analysis of nonaffine displacements in disordered solids sheared across the yielding point
• Accessing a broader range of energy states in metallic glasses by variable-amplitude oscillatory shear
• Alternating shear orientation during cyclic loading facilitates yielding in amorphous materials
• The influence of periodic shear on structural relaxation and pore redistribution in binary glasses
• Structural transformations during periodic deformation of low-porosity amorphous materials
• A delayed yielding transition in mechanically annealed binary glasses at finite temperature
• Fatigue behavior of Cu-Zr metallic glasses under cyclic loading
• Fatigue failure of amorphous alloys under cyclic shear deformation
• Relaxation dynamics in amorphous alloys under asymmetric cyclic shear deformation
• Correlation between plastic rearrangements and local structure in a cyclically driven glass
• Shear band healing in amorphous materials by small-amplitude oscillatory shear deformation