Effect of rolling on the friction coefficient in three-body contact

Almira Miftakhova,Jeng-Haur Horng,Yang-Yuan Chen

doi:10.1177/1687814019872303

Abstract

The contact problem of system of particles rolling over a viscoelastic layer bonded to the rigid half-space was considered. Particles have a spherical shape and their radiuses are distributed along Gauss. Earlier, the friction coefficient was obtained for the particles between surfaces in the relative movement of the surfaces using the three-body interaction method. In this study, the contact area was calculated for a system of particles rolling over the viscoelastic layer bonded to the half-space. Using the three-body interaction approach, the friction coefficient was calculated, taking into account the rolling of particles. The results demonstrate that the coefficient of friction, calculated using the three-body model, decreases when the rolling of particles is taken into account.

Highlights

Real sliding and rolling contacts are characterized by the presence of particles, which should be taken into account in calculations of actual contact area
The friction coefficient was calculated within the framework of the three-body contact model, where the rolling of particles was taking into account
The results show that the difference between the friction coefficient values for particles of various radiuses is greater in case of rolling particles in comparison with particles without rolling

Summary

Introduction

Real sliding and rolling contacts are characterized by the presence of particles (third body), which should be taken into account in calculations of actual contact area. The model of three-body microcontact with elastic deformation was described by Horng-Wen et al.,[17] where the contact temperature was calculated for different size and density of wear particles and friction coefficient. Taking into account the imperfect elasticity of surface, the rolling of wear debris affects the contact characteristics such as friction coefficient and contact area.

Results

Conclusion