Drum brake in the braking process,due to its sealed structure,is struck with some problems like too high temperature,increasing thermal stress,and difficulty in heat dissipation.These factors will have a greater impact on the braking performance of the brake,thus affecting the safe driving of the car.In this paper,a new type of circum disc brake structure is proposed,and its thermal stress coupling charac-teristics under extreme conditions are analyzed.Taking the circular brake disc with an outer diameter of 193mm as an example,finite element simulation and experiment are adopted to obtain the general law of the influence of temperature field,stress field,maximum displacement and other parameters on the bra-king performance.The results show that:in the braking process of the disc brake,the maximum tempera-ture is 153.65℃;the maximum stress is 92.644MPa and the maximum deformation is 4.5562mm.Com-pared with the drum brake of the same size,the maximum temperature,the maximum stress and the max-imum deformation can be reduced by 6％,23％and 8％.Its comprehensive performance index is obviously better than drum brake and it has strong engineering application value.
维普
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