Elastohydrodynamic Lubrication between Two Heavily Loaded Cylinders Lubricated by a Bingham Solid

概要

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It is a purpose of this paper to clarify the behavior of grease lubrication between two cylinders under heavy loads. The hydrodynamic equation of a Bingham solid and the elasticity equation are solved simultaneously by a simplified method to discuss how the core formation in a Bingham flow affects the film thickness and the pressure of the elasto-hydrodynamic lubrication. The pressure dependencies of a plastic viscosity and a yield stress are included in this analysis and their effects are also discussed. It is found that the larger yield stress produces the larger film thickness under a certain load and velocity, and that the pressure dependence of plastic viscosity rather than that of a yield stress affects the film thickness largely. The experiments are carried out to compare with the analytical results.
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