Mechanism of Asperity Deformation between Two Ground Surfaces with Machined Lays in Contact

概要

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This paper studies an approach of two reference planes between two rough surfaces in contact, i.e. an approach due to the elastic and plastic deformations of the contact asperities. Assuming that in the first loading the shape of the contact asperities is pyramidal and in unloading it is pyramidal with a spherical tip, the approach between two ground surfaces in contact resulting from the changes of the surfaces roughness and the relative position of the machined lays are analyzed and discussed. The approaches between two ground surfaces of low carbon steel (S15CK) were measured in loading and unloading. After various loads were applied and removed, the radius of curvature of the contact asperities deformed plastically and the peak heights distribution were also measured. The predictions for the approach, the distribution of the radii of curvature and that of the peak heights agreed with the experimental results.
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