EXPERIMENTAL EVALUATION OF TRIBOLOGICAL PROPERTIES OF DISC BRAKE PAD MATERIAL

Mechanical Engineering

The automobile car disc brakes are safety critical components whose performance depend strongly on contact condition at the pad to disc interface. During braking both brake pad and disc surfaces worn, affecting the useful life of brake as well as its behavior. From the literature, it is found that asbestos is widely used in automobile disc brake pads. But it is found that it may cause cancer to human being because of its carcinogenic nature. Therefore aim of this study is to analyze the effect of different material composition on friction & wear of brake pad. In this study two commercial brake pad materials were considered for investigation i.e. metallic based material and organic based material. The wear test is performed using pin on disk machine by varying the sliding speed, applied load and sliding distance. Full factorial design of three factor-three levels and analysis of variance is used in the study of the wear test. The influence of factors has been identified which can play a key role in wear rate and temperature at the interface of brake disc and brake pad. The wear rate of both metallic and organic pad depends upon load and sliding distance while temperature depends upon load and sliding velocity. The wear rate of metallic pad is more than organic brake pad while temperature developed in organic pad is more than metallic.

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