The pressure dependence of the coefficients of reflection of waves of the first and second harmonics from the surface of a pressed contact carries information on the statistical characteristics of the microprotrusion sizes. A model is proposed that represents the contact as an ensemble of springs of variable lengths. A method based on this model is suggested for processing experimental acoustic data. An estimate of the characteristic size is obtained for a surface roughness element, which corresponds to the surface finish class.
Department of Acoustics, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
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