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Orientation of plastic rearrangements in two-dimensional model glasses under shear

Authors :
Nicolas, Alexandre
Rottler, Jörg
Source :
Phys. Rev. E 97, 063002 (2018)
Publication Year :
2018

Abstract

The plastic deformation of amorphous solids is mediated by localized shear transformations involving small groups of particles rearranging irreversibly in an elastic background. We introduce and compare three different computational methods to extract the size and orientation of these shear transformations in simulations of a two-dimensional (2D) athermal model glass under simple shear. We find that the shear angles are broadly distributed around the macroscopic shear direction, with a more or less Gaussian distribution with a standard deviation of around 20 $\bullet$ about the direction of maximal local shear. The distributions of sizes and orientations of shear transformations display no substantial sensitivity to the shear rate. These results can notably be used to refine the description of rearrangements in elastoplastic models.

Details

Database :
arXiv
Journal :
Phys. Rev. E 97, 063002 (2018)
Publication Type :
Report
Accession number :
edsarx.1802.04035
Document Type :
Working Paper
Full Text :
https://doi.org/10.1103/PhysRevE.97.063002