Training, Memory and Universal Scaling in Amorphous Frictional Granular Matter

TL;DR

This paper investigates how amorphous frictional granular materials develop and retain memory through cyclic training, proposing a universal scaling law that describes dissipation reduction and memory enhancement.

Contribution

It introduces a combined experimental and theoretical framework for understanding memory formation in granular matter and proposes a universal scaling law for dissipation and memory.

Findings

Dissipation decreases with cyclic training.

Memory retention improves with repeated cycles.

Scaling law is universal across different granular interactions.

Abstract

We report a joint experimental and theoretical investigation of cyclic training of amorphous frictional granular assemblies, with special attention to memory formation and retention. Measures of dissipation and compactification are introduced, culminating with a proposed scaling law for the reducing dissipation and increasing memory. This scaling law is expected to be universal, insensitive to the details of the elastic and frictional interactions between the granules.