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Models for the abrasive wear of polymers have identified several surface topography parameters which significantly influence the wear process: the average slope of the asperities, the peak curvature, the bearing area curve, and the autocorrelation length. Because the values of these parameters depend on the profile length and the reference used for the height data, there is no unique set of values for the parameters which describe a surface. For each surface which will be used in contact with another, the dimension of the contact area in the direction of sliding must be determined. The profile length should be set equal to this dimension.
surface topography characterization, wear tests, plastics, surface toughness, surface finish, arithmetic average roughness, autocorrelation function, polymer wear, abrasive wear, bearing area curve
Professor of mechanical engineering, Virginia Polytechnic Institute and State University, Blacksburg, Va.