Theoretical Investigation of Surface Under Soft Mixed Lubrication

摘要

This paper presents the effect of surface roughness in line contact under isothermal soft mixed lubrication with non-Newtonian base on Power law viscosity model. The time independent modified Reynolds equation, elasticity equation and the load capacity of asperities equation were solved numerically using finite different method, Newton-Raphson method and multigrid multilevel methods were used to obtain the film pressure profiles, film thickness profile and contact pressure in the contact region. The simulation results showed the r amplitude of surface roughness has significant effects on the film pressure, film thickness and surface contact pressure in the contact region. The minimum gap between surface, friction coefficient and asperity load increased when the amplitude of surface roughness increases. For increasing surface velocity, the minimum gap between surface increases but asperity load decreases.