Effect of Automotive Speed on the Behaviors of Brake Disc during Braking

Abstract

Modern passenger cars are using disc brakes in the braking system for their high performance. Ingeneral, brake is used to adjust the speed of the vehicle to suit varieties of traffic conditions. Brake discshould behave differently according to the applied forces, the vehicle speed, the total weight and etc. Thiswork aims to study the effect of the vehicle speed during braking on the behaviors of the brake disc usingcoupled thermo-mechanical field in a dynamic finite element analysis. Both brake disc deceleration andfrictional heat generated are considered simultaneously. The monitoring parameters are generated heat,temperature and vibration occurred under various vehicle speeds. The results showed that braking at highvehicle speed gave highly non-uniform temperature field on both rubbing surfaces of the brake disc dueto the excessive frictional heat generated. Consequently, high thermoelastic distortion that leads to severebrake disc vibration is arisen. These analytical results are clearly indicating the importance of materialcapability for heat transfer on braking performance which is a previous factor to improve the designconsideration of the braking system. Moreover, the methodology applied is suitable to adopt for studyingand improving the brake disc behaviors prior to production.

Keywords : Brake Disc / Dynamic Finite Element Analysis