Investigation of Thermo- Structural Behavior of Ventilation Application on Rail Vehicle Disc Brake
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Date
2015-05
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Addis Ababa University
Abstract
In recent decades, disc brakes have increasingly become more popular and gradually found their ways
in many different types of vehicles, ranging from light motorcycles to heavy road trucks or even
trains. They offer several advantages over drum brakes, including better stopping performance (disc
cooled readily), easier to control (not self-applying), less prone to brake fade, and quicker recovery
from immersion, which largely contributed to their popularity. However, after long repetitive braking,
brake fade could still set in and compromise the performance of a disc brake due to the change of
friction characteristics caused by temperature rise and overheating of brake components. Overheated
components could further lead to more problems such as thermal cracks, plastic deformation and the
life span of a disc brake could be shortened as a result. Therefore, to accurately predict the
temperature rise in a disc brake system is of eminent importance in the early design stage. Yet, owing
to the interactions of several physical phenomena, prediction of disc brake performance is highly
complicated. In this thesis, we were apply modeling to the thermomechanical behavior of the
ventilated design of disc and the computational modeling is carried out using FEM .Ventilation
applications on brake discs can significantly improve the brake system performance by reducing the
heating of the discs. In this study, the thermal behaviors of ventilated brake disc configuration were
investigated at repeated brake conditions in terms of heat generation and thermal stresses with finite
element analysis. The results were compared with solid brake.
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Keywords
Thermo- Structural Behavior, Rail Vehicle Disc Brake, Ventilation