Mixed elastohydrodynamic lubrication model for finite roller-coated half space interfaces

This paper presents a mixed elastohydrodynamic lubrication (EHL) model for finite roller-coated half space interfaces. The model is built with the unified mixed lubrication approach and the influence coefficients (ICs) relating the pressure on a contact surface to surface deformations and subsurface stresses, converted from the frequency response functions (FRFs). The elastic deformation is solved with the discrete convolution and fast Fourier transform (DC-FFT) algorithm. This model is used to explore the EHL performance of rollers subjected to a wide range of operating conditions. A parameters study is conducted to reveal the effects of coatings, macro geometry, and surface roughness on the lubrication of rollers.