Thermal Stress and Thermal Expansion in a brake drum of heavy commercial truck

• Main Author: HEMCHI, THA WEESAK
• Format: Final Year Project
• Language: English
• Published: Universiti Teknologi Petronas 2008
• Subjects: TJ Mechanical engineering and machinery
• Online Access: http://utpedia.utp.edu.my/10264/1/2008%20-%20Thermal%20Stress%20And%20Thermal%20Expansion%20In%20A%20Brake%20Drum%20Of%20Heavy%20Commercial%20Truck.pdf; http://utpedia.utp.edu.my/10264/

Brake system is one of crucial system in automobile. Poor performance or brake failure will cause fatal accident especially for heavy transportation vehicle. Excessive thermal stresses may canse undesirable effects on the material of brake drum that eventually lead to the initiation of a crack. This dissertation investigates the thermal stress and thermal expansion develops in a ~rake drum of heavy commercial trnck due to temperature distribution in severe braking condition. The analysis is done by simulate the temperature distribution and the thermal stress distribution within the drum material nsing finite element approach in ANSYS simulation program. Before the simulation work, dynamic of moving truck and rotating drum are analyzed. Also, the energy conversion analysis is made to determine amount of frictional heat flux created, which the values will be applied in the simulation input for the temperature distribution. And the temperature distribution result will be applied in the structural analysis field as the input for thermal stress and expansion analysis. The simulation results give the highest temperature of 255T at the middle of braking period which is 2.6 second. The maximum thermal stress result is achieved 93 MPa at 1.32 second after braking started and the maximum thermal expansion is achieved in radial expansion of 2.9 millimeter at 2.6 second of braking period. The evaluation of simulation results give the information for prediction and contribute toward improving design, modeling and analysis technique for integrity of thermo-mechanical system that subjected to high temperature.