Effect of pressure of intercontact gap filler on partial slip of bodies caused by thermal strains

Abstract

The partial frictional slip of two semi-infinite bodies of similar materials in the presence of a
medium in an intercontact gap has been investigated. The cause of microslip is thermal strains
induced by heat flow. Both mechanical influence (pressure on the surfaces of the bodies) and
thermal influence (thermal resistance) of the gap filler have been taken into account. As a
mathematical model of the interstitial medium, the ideal gas has been chosen. The formulated
contact problem has been reduced to two singular integral equations for a gap height and a
relative shift of the surfaces of the bodies and a Prandtl singular integro-differential equation for
a temperature jump between the gap surfaces. Numerical calculations have been carried out when
the material of the bodies is stainless steel AISI 304 in the presence of air or carbon dioxide in the
gap. The effect of the medium pressure and applied load on the width of the slip zones and the
relative shift of the surfaces of the bodies has been analyzed.