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- W4287605213 abstract "Atomistic deformation simulations in the nominally elastic regime are performed for a model binary glass with strain rates as low as $10^{4}$/sec (corresponding to 0.01 shear strain per 1$mu$sec). A robust elasticity is revealed that exhibits only minor elastic softening, despite quite different degrees of structural relaxation occurring over the four orders of magnitude strain rates considered. A closer inspection of the atomic-scale structure indicates the material response is distinctly different for two types of local atomic environments. A system spanning iscosahedrally coordinated substructure responds purely elastically, whereas the remaining substructure also admits microplastic evolution. This leads to a heterogeneous internal stress distribution which, upon unloading, results in negative creep and complete residual-strain recovery. A detailed structural analysis in terms of local stress, atomic displacement, and SU(2) local bonding topology shows such microscopic processes can result in large changes in local stress and are more likely to occur in geometrically frustrated regions characterized by higher free volume and softer elastic stiffness. These insights shed atomistic light onto the structural origins that may govern recent experimental observations of significant structural evolution in response to elastic loading protocols." @default.
- W4287605213 created "2022-07-25" @default.
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- W4287605213 date "2020-11-05" @default.
- W4287605213 modified "2023-09-24" @default.
- W4287605213 title "Micro-plasticity in a fragile model binary glass" @default.
- W4287605213 doi "https://doi.org/10.48550/arxiv.2011.02704" @default.
- W4287605213 hasPublicationYear "2020" @default.
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