Density scaling and quasiuniversality of flow-event statistics for athermal plastic flows

TL;DR

This study demonstrates that athermal plastic flow-event statistics exhibit density scaling and quasiuniversality, enabling predictions across densities using minimal simulations based on hidden scale invariance.

Contribution

It introduces a method to predict flow-event properties at various densities from a single simulation using hidden scale invariance principles.

Findings

Flow-event distributions can be predicted at different densities from one simulation.

Flow-event statistics show quasiuniversality across different systems.

Density scaling applies to athermal plastic flows in Lennard-Jones systems.

Abstract

Athermal plastic flows were simulated for the Kob-Andersen binary Lennard-Jones system and its repulsive version in which the sign of the attractive terms is changed to a plus. Properties evaluated from simulations at different densities include the distributions of energy drops, stress drops, and strain intervals between the flow events. By reference to hidden scale invariance we show that simulations at a single density in conjunction with an equilibrium-liquid simulation at the same density allows one to predict the plastic flow-event properties at other densities. We furthermore demonstrate quasiuniversality of the flow-event statistics.