Combining and Contacting of Two Rough Surfaces with Asymmetric Distribution of Asperity Heights

摘要: The statistical approach of describing rough surfaces is extended to include the contact oftwo in which their distribution asperity heights can either be symmetricor asymmetric, and asymmetry modeled using normalized Weibull distribution.In considering between two surfaces, as most practical applications,the approximated by an equivalent surface with a smoothplane. roughness parameters are obtained spectralmoment method, its validity verified realistic measure-ments. This paper presents method obtain Weibulldistribution heights, standard deviation skewness parametersof actual contacting preserved. advantages thismethod demonstrated via direct comparisons previously proposed aswell exact numerical simulation several differentactual from magnetic storage MEMS applications. For engineeringapplications, where each individual known,contour plots for value provided forpractical ranges combinations ratios values. Asexpected when one dominates, issolely determined rougher surface. @DOI: 10.1115/1.1614822#