Abstract
This study proposes a dynamic model of a lubricated roller contact, focusing on the excitation of surface pit/defect. The fluctuation of contact force caused by periodic surface topography variation is used to determine the dynamic displacements and velocities of contact bodies. These responses, in turn, affect the thickness and flow of lubrication film, impacting contact pressure, and consequently contact force that is required in the dynamic analysis. It is shown, as the pit size grows, the acceleration increment escalates, therefore, can be used as an effective indicator for pitting failure occurrence. Additionally, a comparison of contact pressure between dynamic simulation and its quasi-static counterpart points to the importance of dynamic responses in tribological behavior description.
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