Coarse-graining amorphous plasticity: impact of rejuvenation and disorder
Abstract
The coarse-graining of amorphous plasticity from the atomistic to the mesoscopic scale is studied in the framework of a simple scalar elasto-plastic model. Building on recent results obtained on the atomistic scale, we discuss the interest in a disordered landscape-informed threshold disorder to reproduce the physics of amorphous plasticity. We show that accounting for a rejuvenation scenario allows us to reproduce quasi-quantitatively the evolution of the mean local yield stress and the localization behavior. We emphasize the crucial role of two dimensionless parameters: the relative strength of the yield stress disorder with respect to the typical stress drops associated with a plastic rearrangement, and the age parameter characterizing the relative stability of the initial glass with respect to the rejuvenated glass that emerges upon shear deformation.
Keywords
Cite
@article{arxiv.2208.14366,
title = {Coarse-graining amorphous plasticity: impact of rejuvenation and disorder},
author = {Botond Tyukodi and Armand Barbot and Reinaldo Garciá-Garciá and Matthias Lerbinger and Sylvain Patinet and Damien Vandembroucq},
journal= {arXiv preprint arXiv:2208.14366},
year = {2022}
}