An elasto-plastic approach based on microscopic insights for the steady state and transient dynamics of sheared disordered solids

TL;DR

This paper introduces an elasto-plastic modeling framework that combines microscopic insights and mesoscale measurements to accurately describe the steady state and transient dynamics of sheared disordered solids.

Contribution

It presents a novel coupling of microscopic and mesoscale models to better understand the mechanical response of athermal amorphous solids under shear.

Findings

Model accurately reproduces transient and steady state behaviors.

Framework matches experimental and simulation data.

Applicable to both shear-rate and creep protocols.

Abstract

In this letter, we develop a framework to study the mechanical response of athermal amorphous solids via a coupling of mesoscale and microscopic models. Using measurements of coarse grained quantities from simulations of dense disordered particulate systems, we present a coherent elasto-plastic model approach for deformation and flow of yield stress materials. For a given set of parameters, this model allows to match consistently transient and steady state features of driven disordered systems under both applied shear-rate and creep protocols.