DETERMINATION OF CONTACT CONDITION AT ELEVATED TEMPERATURE

摘要

To model complex structure with numerous components and solids, the condition of contact between two solids must be adequately described. In this investigation, a special apparatus developed to analyze the condition of contact between two solids is presented. With this apparatus, experimental tests can be performed to determine the condition of friction (static and dynamic and the transition from one to the other) and the thermal and electrical contact resistances between two disk shaped rotating samples of different nature at various temperatures (from ambient up to 1000°C) and contact pressures. To determine the evolution of the friction mechanism as a function of the relative displacement between the solids, an inverse mathematical method has been developed and is presented. The results obtained with the apparatus proposed will provide a better understanding of the contact condition and could be easily incorporated in future mathematical models describing the behaviour of complex, multi layered structures.