COMPUTATIONAL AND EXPERIMENTAL METHODS FOR PREDICTING THE ENDURANCE OF SURFACING MATERIALS
The article examines the effect of various factors on the wear rate of surfacing materials. The analysis was conducted in two main areas: the study of the wear processes kinetics, the influence of frictional contact conditions on wear resistance, and the determination of the mechanism of materials wear for severe frictional contact conditions. The authors studied the behavior of surfacing materials during slips on a plastic metal, including at high temperatures (up to 850-960 ° C), during rolling in the area of elastic contact and during rolling about a plastic metal, during a pulsating interaction in elastic and plastic areas, including the dynamic nature of contact loading and high temperatures. The results of the study of contact damage models of surfacing materials show that it is possible to determine their wear resistance depending on the rate of fatigue development of microcracks and the duration of the process of destruction of the surface layer. It is proposed to determine the parameters of contact crack resistance, based on the geometric characteristics of the contact fracture areas and the duration of the process of their formation. In this case, when analyzing the process of destruction already at the initial stage of contact damage, it becomes possible to predict the contact endurance of surfacing materials as a whole. A complex was developed consisting of a friction machine equipped with a special sensor that detects the geometric characteristics of contact damage centers on the friction surface. The computer calculates the parameters of contact crack resistance and determines the predicted value of the contact endurance of the material.