Abstract
The elastohydrodynamic oil film formed between a steel ball and a sapphire disk was observed by an optical interference method. In this study, the influence of a slip on the elastohydrodynamic oil film was investigated by creating a difference between the steel ball velocity and the sapphire disk velocity. The experiment shows that the film thickness formed under the condition of a constant mean velocity decreases with the increase of the slip. This finding is entirely different from the isothermal elastohydrodynamic theory. There is a possibility that this experimental result is due to the effect of oil temperature increase caused by the shearing heat and the effect of the non-Newtonian response of oils.
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