Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 525, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2019.119683
Keywords
Metallic glasses; Periodic deformation; Yield stress; Molecular dynamics simulations
Funding
- National Science Foundation [CNS-1531923]
- Russian Academic Excellence Project '5-100'
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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.
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