Disc Brake Performance : FEA

Low, Seong Gook (2008) Disc Brake Performance : FEA. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

The disc or rotor provides braking surface or friction surface for brake pads to rub against when braking is applied. The main function of brake rotor disc is for transmission of mechanical force and dissipation of heat produced implies to be functioning at both medium and high temperature. The excessive heat cause by high temperatures during braking may causes brake fade, premature wear, brake fluid vaporization, bearing failure, thermal cracks and thermally-excited vibration on disc brake systems. This project aims to determine the DTDP ventilated disc brake transient temperature and examine the disc thermal stress behaviour by using finite element analysis (FEA) software. In this project, the FEA software MSC NASTRAN 2005 is used to analyse the temperature and thermal stress behaviour of the disc under some periodic braking operation. An existing ventilated disc brake rotor model is then created in CA TlA V5R 10 program and is exported into MSC NASTRAN for analytical purposes. Before starting the analysis, an important parameter such as heat flux applied on the braking surface and convective heat transfer coefficient for braking surface and vane hole of disc is calculated via mathematical calculation. The results of temperature contours, coning angle cause by thermal expansion of disc are analyzed at the end of the simulation process. The result of analysis indicates that the vent holes show effectiveness for cooling capacity if compared to solid disc brake.

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