Abstract
This paper studies film thickness in isothermal pure rolling elastohydrodynamic lubrication (EHL) considering lubricant viscoplasticity. The central film thickness formula based on lubricant viscoplasticity regressed out by this study shows a deviation of elastohydrodynamic lubrication from the conventional theory under high rolling speeds and heavy loads. This deviation actually describes the elastohydrodynamic film thickness when the lubricant shear strength and the maximum endurable shear stress on the lubricant-surface interface in EHL inlet zones degrades due to high temperature.
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