Influence mechanism of morphological parameters on tribological behaviors based on bearing ratio curve

The influence mechanism of the contact surface morphology statistical parameters, such as Sa, Sq, Ssk, and Sku, on the friction and wear properties has not been well explained or understood. This paper establishes formulas between the bearing area ratio and friction coefficient for dry and lubricated friction, investigates the relationship between the bearing area ratio curve and roughness parameters, and subsequently explains the influence mechanism of the roughness parameters on the friction and wear by the bridge of the bearing area ratio. Finally, dry and lubricated pin-on-disc tests were performed on samples with different roughness parameters, and the experimental results verify that the established formulas and the explanation of the influence mechanism are feasible and reasonable.