# A computational study of transient shear banding in soft jammed solids

## TL;DR

This study uses 3D numerical simulations of soft spheres to investigate transient shear banding during the yielding of jammed soft solids, revealing robust features unaffected by damping mechanisms or boundary conditions.

## Contribution

The paper introduces a detailed computational analysis of transient shear banding in jammed soft solids, highlighting the robustness of stress-overshoot phenomena across different simulation setups.

## Key findings

- Stress-overshoot and transient banding are robust features in overdamped systems.
- Boundary conditions and damping mechanisms influence load curves and velocity profiles.
- Transient shear banding occurs consistently regardless of simulation parameters.

## Abstract

We have designed 3D numerical simulations of a soft spheres model, with size polidispersity and in athermal conditions, to study the transient shear banding that occurs during yielding of jammed soft solids. We analyze the effects of different types of drag coefficients used in the simulations and compare the results obtained using Lees-Edwards periodic boundary conditions with the case in which the same model solid is confined between two walls. The specific damping mechanism and the different boundary conditions indeed modify the load curves and the velocity profiles in the transient regime. Nevertheless, we find that the presence of a stress-overshoot and of a related transient banding phenomenon for large enough samples are a robust feature for overdamped systems, where their presence do not depend on the specific drag used and on the different boundary conditions.