The effect of thermal deformation on contact temperature is investigated by considering a spherical asperity sliding on the surface of a semi-infinite insulated solid. The usual assumption that thermal deformation does not change the contact conditions is examined. The problem is mathematically formulated using appropriate Green’s functions to derive singular integral equations for the contact pressure. The relations between the radius of contact area, indentation, surface temperature, and moving velocity are calculated. A two asperities model is used to explain the load partition due to thermal deformation.

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