On the Distribution of Surface Roughness when Two Surfaces Are Pressed Together

Abstract

In the study of contact of two surfaces, surface roughness is especially important. So first it is necessary to study how an initial roughness changes under the given conditions. And distribution constants of the profile in terms of an estimation of roughness are useful. We press two surfaces each other under the given conditions, study the process of change of roughness and obtain a transformation law from distribution of the pressed surface profile to that of the initial profile. Using the results, we consider about the contacting ratio, the gap between two contacting surfaces and the coefficients of changing roughness determined by combination of two materials of the surfaces, etc.