Complex Micromodel Analysis of Wearing Contact Interfaces

The behavior of tribological systems with hybrid lubrication using solid lubricants on graphite basis and/or liquid lubricant can be optimized. This can be achieved by a detailed knowledge of the transfer mechanisms induced by the tribological stress and consequential material and surface design adaptations. Our first approach is a finite element model containing a representative model of the real asperity geometry and distribution. With this model we can estimate the temperature and pressure distribution in the contact zone. The model is based on an assembly of volumes which limit the surfaces taking part in heat exchange and load transfer. Each surface has a set of equations for heat exchange and mechanical loading in the contact. Similarly, transport mechanisms concerning the liquid lubricant, solid lubricant particles and the dissemination of wear particles are considered.