Study of roughness effect on elastic indentation of coated bodies

Abstract

Two-level contact problem is proposed to study the effect of roughness of elastic coatings. The solution is based on using a function of additional displacements in a macrolevel contact problem formulation. The dependence of additional displacements on nominal pressure is obtained from consideration of a periodic model of roughness. Analytical–numerical method, which is based on Hankel integral transforms, boundary elements, and iteration procedure, is used to find macrocontact characteristics. The influence of the parameters of microgeometry on contact characteristics at macroscale is analyzed.