Frictional Contact and Stick-Slip: Mechanism and Numerical Technology

Abstract

Further mechanism of frictional contact and stick-slip phenomenon needs to be studied carefully because of its commonality and great significance to the science and industry. The present work gives a reasonable exploration of the further mechanism of the frictional contact and stick-slip phenomenon in the modern solid mechanic view. Specifically, the authors classify the frictional contact to the fundamental interactions and investigate the micro-mechanism of the stick-slip phenomenon which provides a scientific and advanced comprehension to these problems. The feasible numerical technology is proposed based on these advanced views. The van der Waals interaction is introduced to describe the contact tractions and a novel nonlinear friction law is proposed to deal with the tangential friction contact in the interface. The average crystal distance is defined to analyze and to reproduce the healing process in the stick-slip motion. The numerical results show the feasible of the proposed technology. The effects of loading rate and average crystal distance on the stick-slip process are investigated by the proposed method.

Keywords: Frictional contact, Stick-Slip, Van der Waals interactions, Average crystal distance, Multiscale modeling