NUMERICAL MODELLING OF THE MECHANICAL PROCESS OF PARTICLE DETACHMENT BY FINITE ELEMENT METHOD

Abstract

This paper presents a numerical simulation technique for calculating the strain and the stress state at every point of the surfaces, containing real surface topology and layered structure. Depending on the nature of deformation, we can evaluate the actual stress and strain state either from the point of view of the fatigue failure or from the point of view of the exhaustion of deformation capacity of the surfaces. Using the stress and strain components calculated by the Finite Element Method at every nodal point of the surfaces, it is possible to predict the probable surfaces degradation mechanism, i.e. to predict the probable mechanism of the particle detachment under dry sliding conditions, under consideration of the nominal load and to the required lifetime of the surface.