Brake system is the most important safety device on the car (! A lot of traffic accidents are related to the failure of the brake system! To ensure the safety of the man and the car "must be equipped with a very safe and reliable brake system spare parts for the car! For the drum brake, the braking force is produced by the friction between the friction plate and the brake drum. The good or bad of the drum directly affects the braking performance of the car!

    During the braking process, the potential energy and kinetic energy of the vehicle change to heat through the friction between the brake drum and the friction disc. When the brake torque is much smaller than the maximum braking force on the ground on the tire, the brake energy will be absorbed by the brake to increase the brake temperature, and the high temperature of the brake will cause the increase of thermal stress. The braking torque will be reduced, so the influence of temperature must be taken into account when calculating the stress and deformation of brake drum.

    In order to study the thermal stress problem of the brake drum, we must know the temperature distribution in the braking process to determine the distribution of the thermal stress field so as to provide the basis for the optimum design of the brake drum.