Issue 38, 2020

Residual stress distributions in amorphous solids from atomistic simulations

Abstract

The distribution of local residual stresses (threshold to instability) that controls the statistical properties of plastic flow in athermal amorphous solids is examined with an atomistic simulation technique. For quiescent configurations, the distribution has a pseudogap (power-law) form with an exponent that agrees well with global yielding statistics. As soon as deformation sets in, the pseudogap region gives way to a system size dependent plateau at small residual stresses that can be understood from the statistics of local residual stress differences between plastic events. Results further suggest that the local yield stress in amorphous solids changes even if the given region does not participate in plastic activity.

Graphical abstract: Residual stress distributions in amorphous solids from atomistic simulations

Article information

Article type
Paper
Submitted
24 Jun 2020
Accepted
25 Aug 2020
First published
01 Sep 2020

Soft Matter, 2020,16, 8940-8949

Residual stress distributions in amorphous solids from atomistic simulations

C. Ruscher and J. Rottler, Soft Matter, 2020, 16, 8940 DOI: 10.1039/D0SM01155J

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