Variation in Fractal Properties and Non-Gaussian Distributions of Microcontact Between Elastic-Plastic Rough Surfaces With Mean Surface Separation

摘要: The fractal parameters (fractal dimension and topothesy), describing the contact behavior of rough surface, were considered as constant in earlier models. However, their results are often significantly different from experimental results. In present study, these two roughness have been derived analytically a function mean separation first, then they found with aid By equating structure functions developed ways, relationship among scaling coefficient power spectrum function, dimension, topothesy asperity heights can be established. variation determined when obtained number spots at separations. probability density heights, achieved separation, was non-Gaussian distribution; it is expressed skewness kurtosis. between established through fitting by this distribution. For sufficiently small either total load or real area predicted variable parameters, well distribution, greater than that Gaussian difference models enhanced becomes small.