Regimes of adhesive wear in dry contact: Conditions of realization and determining parameters

Abstract

The paper reviews tangential adhesive contact of single asperities of elastic-plastic body surfaces. With the help of discrete element method we carried out a parametric study of influence of the parameters of adhesive interaction of the surfaces on the regime of asperity wear. It was established that with the adhesion work increase, the wear regime evolves from the mutual slippage of asperities to their attrition or brittle fracture, therewith the regime change has threshold nature. We obtained an empirical sigmoidal dependence of the threshold value of adhesion strength separating the slippage and attrition regimes on the strain-hardening coefficient of the material The results of the research make an important contribution to understanding the mechanisms that determine the development and intensity of wear in dry contact with adhesion.