Elastohydrodynamic Lubrication

Abstract

An elastohydrodynamic model which simulates the tractive behavior of the lubricant in rolling—sliding concentrated contacts is presented. The model consists of two parts: the computation of lubricant film thickness from the prescribed viscosity—temperature—pressure relation in the low-pressure region, and the prediction of traction based on the lubricant constitutive equation in the high-pressure region. For the latter, the coefficients are estimated by a least-squares analysis of the experimental traction data. The coefficients defining the behavior of a number of lubricants are presented.