Mass and Energy Balance of a Three-Body Tribosystem

In the context of sustainable development and under impulse continuous technological progress, tribology contributes to improvement life span parts in dynamic contact efficiency mechanical systems. However, even if successes are obtained lubrication, community struggles build generalised laws friction wear case dry friction. Based on thermodynamics open systems, we suggest an adaptation conservation mass energy equations tribosystem. The latter is modelled using concepts tribological triplet, circuit accommodation mechanisms. tribosystem described with four control volumes: two them represent first bodies contact; a third one tribofilm produced by debris emission from bodies; fourth volume used as interface between body external environment. A balance applied these volumes considering their interactions. An then derived applying principle thermodynamics. Two systems interdependent that describe circulation matter flows outlined. These can be considered basis for future experimental developments would aim at simultaneously characterising different modes dissipation contact, qualitatively especially quantitatively.