Temperature rise of diamond-like carbon during sliding: Consideration of the real contact area

Abstract

The real contact area based on modified Hertzian theory derived from sinusoidal asperity model is introduced and the measurement method for the real contact area is proposed. The real contact approach is compared with the Greenwood-Williamson theory showing good agreement between the two methods. The separation between the contact surfaces is estimated by taking into account the surface roughness. The temperature rise at the sliding interface between the DLC coating and E52100 steel is evaluated experimentally by the thermal indicator paint method, and the real contact area ratio is estimated from the temperature simulation data. The temperature rise is discussed from the entropy balance point of view induced from the real contact area and the frictional energy.

Influence Factors on Mechanisms of Superlubricity in DLC Films: A Review

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In-situ X-ray tomography of wear – A feasibility study

“…The real area of contact is of importance in wear as the location of greatest local stresses and heat generation [42,43,44,45]. In electrical contacts, the real area is of importance to contact resistance [46,47].…”

Numerical and experimental study of the relationship between friction area and temperature of aluminium-based brake disc

“…Similarly, the contact area between the brake pad and disc is one of the most important factors influencing the friction heat. 4,19 Much attention was paid to the relationship between friction area and brake disc temperature. Panier et al 20 experimentally investigated the effect of contact area on the hot spot on the forged steel brake disc surface.…”