Reliability Study of Vehicle Disk Brake Systems
Date Issued
2008
Date
2008
Author(s)
Hung, Chia-Hung
Abstract
Brake is considered one of the most important systems related to the safety of a vehicle. How to provide strong and stable deceleration by brakes has long been a major design concern for engineers. In general, brake parts face various aging problems after a long period of operation. It definitely affects the safety of a vehicle. The purpose of the present thesis is to carry out a reliability study of disk brake systems used in vehicles. First, failure mode and effect analysis (FMEA) is carried out to find possible failure modes of components of a brake system, and to identify the key component that is most vulnerable to failure. Tribology theory is then used to construct a life prediction model of the key component. The life of the brake system can be evaluated accordingly. Afterwards, a probabilistic assessment model is proposed to estimate the reliability and failure rate of the key component. Finally, ARINC method is adopted to allocate component failure rates of the brake system. Through the study, it is found that sliding wear of the brake pad is the most serious problem of a disk brake system. The cup and seal are other components that have to be watched carefully. The thesis also illustrasted that, under reasonable assumptions, the expected life, reliability and failure rate of the brake pad can all be predicted.
Subjects
Disk Brake
Failure Mode
Risk Matrix
Brake Pad Wear
Reliability
Type
thesis
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