SIMULATION STUDY OF THE VEHICLE BRAKING PROCESS WITH TEMPERATURE-DEPENDENT COEFFICIENT OF FRICTION BETWEEN BRAKE PAD AND DISC
Andrzej Borawski, Dariusz Szpica, Grzegorz Mieczkowski, Mohamed M. Awad, Rizk Mostafa Shalaby, Mohammed Sallah
Abstract
Brakes are one of the most important components of any machine with moving parts, predominantly vehicles. In most cases, these are friction brakes. Their operating principle is based on the transformation of kinetic energy of motion into thermal energy. It is important that the brakes have the same, constant parameters of operation and the stability of the coefficient of friction (COF) throughout their exploitation time. The life and health of road users may depend on this. Unfortunately, the materials used in the production of brake pads do not ensure the temperature stability of the coefficient of friction. Its value changes with increase in the temperature. The size of the lesion is an individual feature of each material, but in extreme cases it can even drop to zero, or almost to zero. An example of this type of relationship is presented in this paper. Temperature dependence of the coefficient of friction was designated, and it is used for simulation tests aimed at determining the temperature profiles of the vehicle brake disc and pad during emergency braking while driving at a high speed.