Abstract

Elastohydrodynamics has been characterized as a mature science, having begun about 70 years ago with the Ertel–Grubin solution for the film thickness, which had previously been thought to be insignificant compared with the surface roughness of the lubricated surfaces. Classical elastohydrodynamic lubrication, however, developed in manner that is odd for a quantitative science. The pressure dependence of viscosity, a property essential to the existence of the field, was not accurately described in the many books on this subject until recently. In spite of this deficiency, it will be helpful to introduce the subject with a cursory exposition of what has come before.

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