Accelerated relaxation in disordered solids under cyclic loading with alternating shear orientation

Abstract

The effect of alternating shear orientation during cyclic loading on the relaxation dynamics in disordered solids is examined using molecular dynamics simulations. The model glass was initially prepared by rapid cooling from the liquid state and then subjected to cyclic shear along a single plane or periodically alternated in two or three dimensions. We showed that with increasing strain amplitude in the elastic range, the system is relocated to deeper energy minima. Remarkably, it was found that each additional alternation of the shear orientation in the deformation protocol brings the glass to lower energy states. The results of mechanical tests after more than a thousand shear cycles indicate that cyclic loading leads to the increase in strength and shear-modulus anisotropy.

23 pages, 9 figures

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Cited by in corpus (16)

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• Shear band formation in amorphous materials under oscillatory shear deformation
• Spatiotemporal analysis of nonaffine displacements in disordered solids sheared across the yielding point
• Accelerated rejuvenation in metallic glasses subjected to elastostatic compression along alternating directions
• Structural relaxation in amorphous materials under cyclic tension-compression loading
• Alternating shear orientation during cyclic loading facilitates yielding in amorphous materials
• Accessing a broader range of energy states in metallic glasses by variable-amplitude oscillatory shear
• A delayed yielding transition in mechanically annealed binary glasses at finite temperature
• Fatigue behavior of Cu-Zr metallic glasses under cyclic loading
• Cooling under applied stress rejuvenates amorphous alloys and enhances their ductility
• Annealing effects of multidirectional oscillatory shear in model glass formers
• Structural relaxation and delayed yielding in cyclically sheared Cu-Zr metallic glasses
• Fatigue failure of amorphous alloys under cyclic shear deformation
• Relaxation dynamics in amorphous alloys under asymmetric cyclic shear deformation
• Shear band healing in amorphous materials by small-amplitude oscillatory shear deformation
• Computational Methods toward Ultrastable Glasses