Experimental investigation of thermal problem of dry friction brake using different friction materials.

The most important machine elements of the braking system are the brake disc and pads. During the braking process, the braking torque is necessary to decelerate the speed of the vehicle or stop it. High amount of frictional heat will be generated during the braking process due to the sliding between the moving part (brake disc) and fixed parts (brake pads). The present research involves two parts, in the first part it will be investigated the effects of difeeerent properties of three friction materials (St37-2, G95 and HCC) on the thermal behavior of the brake system. While, in the second part, the expedite work will be achieved to measure the temperature distribution during the braking process. A parametric study was achieved to find out the effect of different factors such as angular velocity, applied pressure and material propertiese on the behavior and performance of the brake system. The minimum values of temperature obtained when using friction material (HCC) which is about 52.3 °C, G95 was 53.8 °C, and for St37-2 was 56.8 °C. The temperature increases with velocity and pressure, maximum values of temperature is obtained when using (St37-2) pad material and minimum value is obtained when using (HCC) pad material. [ABSTRACT FROM AUTHOR]