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.

arXiv comment23 pages, 9 figures

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Cited by in corpus (17)

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• The effect of thermal history on the atomic structure and mechanical properties of amorphous alloys
• Shear band formation in amorphous materials under oscillatory shear deformation
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• Computational Methods toward Ultrastable Glasses