The statistical characteristics of static friction

TL;DR

This paper uses molecular dynamics simulations to analyze the microscopic statistical properties of static friction between crystal surfaces, revealing how load and temperature influence atomic-scale friction behavior.

Contribution

It introduces a detailed statistical analysis of atomic friction forces and explores the effects of load and temperature on static friction at the microscopic level.

Findings

Atomic friction forces follow specific statistical distributions.

Normal load and temperature significantly affect atomic friction characteristics.

Provides new insights into the micro-states underlying static friction.

Abstract

Friction is one of the fundamental issues in physics, mechanics and material science with lots of practical applications. However, the understanding of macroscopic friction phenomena from microscopic aspect is still on the way. In this work, molecular dynamic simulations are performed to investigate the static friction between two planar crystal surfaces. The friction force experienced by each atom is tracked and the statistical characteristics of atomic friction force are illuminated. More importantly, the influences of normal load and temperature on the statistical features are generalized. This study provides a new insight on the micro-states of friction.