Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
THERMAL ANALYSIS OF BRAKE DISCS OF A BAJA SAE PROTOTYPE
Submission Author:
Carlos Filipe Lacerda Martins , BA
Co-Authors:
Carlos Filipe Lacerda Martins, Jéssica Santos de Oliveira, Igor Belisario, Jordan Caliman, Arthur Dal'Col, Gabriella Julião Andrade de Santana
Presenter: Jéssica Santos de Oliveira
doi://10.26678/ABCM.COBEM2021.COB2021-1454
Abstract
During the design of the brake system for an off-road prototype, the temperature reached by the disc during braking must be taken into account, as a result of friction between the disc and the pad, generating the transformation of kinetic energy into thermal. This increase can cause catastrophic and silent failures, such as: loss of friction with a reduction in the coefficient of friction and formation of bubbles in the fluid. The aim of this study is to perform a thermal analysis of the front and rear axle brake discs of a Baja prototype, which will influence their material selection. Therefore, the analytical method was used, varying the ways to obtain the convective coefficient for parallel flow in flat plates. Considering the solid disk and adopting the method of concentrated systems through the analysis with transient condition, with the aid of Matlab software, the behavior of the surface temperature of the disk was analyzed as a function of 100 consecutive braking, every 30 seconds of cooling. Gray cast iron, stainless steel and SAE 1045 carbon steel were the materials analyzed. Comparing the results, it was found that stainless steel had less temperature variation, and in relation to the shafts, the front disc had greater variations.
Keywords
Baja, Brake, discs, Temperature, materials
