Center for Railway Engineering

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Thermo-Mechanical and Life Time Analysis of AA-LRT Disc Brake Under Different Speed and Load During Emergency Braking
(Addis Ababa University, 2015-06) Negasi, Kahsay; Tsegaye, Feleke (Mr.)
The main purpose of this study is to analyze the thermo-mechanical behavior of the dry contact between the brake disc and pads under different speed and load of the AA-LRT train during emergency braking. CATIA software was used for the modeling purpose. The thermo-mechanical analysis of the disc brake was carried out using ANSIS workbench. In this work, a transient thermal and structural analysis was carried out to investigate the temperature variation across the disc, total heat flux using ANSYS software. The thermal-structural analysis is then used to determine the deformation established and stresses in the disk. And also the life time of the disc was analyzed using ANSIS workbench. In all cases as vehicle speed and load of the vehicle increases both temperature and Total heat flux increases. But For a constant speed of vehicle as the load increases both the Equivalent stress and Total deformation increases. But if speed of the vehicle increases both Equivalent stress and Total deformation increases for all loads. As the load and speed of the vehicle increases the life time of the vehicle decreases. Moving the train with speed of 22.342 m/s shortens the life disc brake.