# Scaling laws for frictional granular materials confined by constant pressure under oscillatory shear

## TL;DR

This study numerically investigates the rheological behavior of 2D frictional granular materials under oscillatory shear, revealing scaling laws for moduli and linking them to contact force distributions and physical mechanisms.

## Contribution

It introduces new scaling laws for the rheology of frictional granular materials under oscillatory shear and explains their physical origins.

## Key findings

- Identified scaling laws for storage and loss moduli
- Linked scaling exponents to contact force distributions
- Explained the physical mechanisms behind the scaling laws

## Abstract

Herein, we numerically study the rheology of a two-dimensional frictional granular system confined by constant pressure under oscillatory shear. Several scaling laws for the storage and loss moduli against the scaled strain amplitude have been found. The scaling laws in plastic regime for large strain amplitude can be understood by the angular distributions of the contact force. The scaling exponents are estimated by considering the physical mechanism.