The elastohydrodynamic lubrication of a highly elastic cylindrical surface

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Abstract
The elastohydrodynamic lubrication of a cylindrical rubber surface sliding over a glass plate has been studied directly using an optical interference technique and the experimental results compared with those predicted by a particular theoretical solution. The agreement between the experimental and theoretical results appears, under elastohydrodynamic conditions, to be very good. Under conditions of light load and high speed, that is, under more nearly classical hydrodynamic conditions, agreement was less satisfactory. Analysis suggests that this is due mainly to the late start in the pressure build-up in the contact zone between rubber and glass. The technique for measuring film thicknesses and profiles interferometrically in `soft' contacts appears to have considerable potential and should find application in several engineering problems.

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