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The automobile contains several very important parts, one of which is the friction clutch. Its importance comes from being it is a mechanical coupling device that plays the role of connecting and transmitting the torque generated in the engine to the gear set in the gearbox. The friction material is an important parameter due to withstand the mechanical and thermal load generated in the clutch system. This paper focused on studying the thermal behavior of four different friction lining materials (LUK, Tiger, G95, and HCC) to identify the temperature distribution for each material separately and then compare these materials to arrive at the best material that you can choose in the dry clutch design. Modeling of the model was done by the method of finite element and with the help of the ANSYS program to perform numerical simulations and show results. It may be determined that the thermoelastic behavior of the clutch is influenced by the type of frictional lining material used. After comparing the data, it was discovered that the materials (HCC and G95) were vulnerable to clutch activation for long periods. In the current investigation, the lining materials stood out because they demonstrated a high thermal efficiency when compared to the other materials in the prior study. [ABSTRACT FROM AUTHOR]

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]