Abstract
During frequent braking, drum brakes are easy to brake failure due to overheating. This article takes the honeycomb structure with good heat dissipation performance as the imitation object, designs circular, square, and honeycomb patterns on the surface of the brake lining. Firstly, the thermal mechanical coupling method is used to analyze the heat dissipation effect and mechanism of various patterns during emergency braking and repeated braking. It can be found that the honeycomb pattern has a better heat dissipation effect. Compared with normal brake lining, the honeycomb pattern can reduce the maximum surface temperature of the brake lining by 14.6%. The finite element analysis of the temperature field of brake lining with different patterns shows that the side of circular and honeycomb pattern have a larger heat dissipation area, which accelerates the heat dissipation of the convex body. Subsequently, circular, square, and honeycomb patterns are prepared on the surface of the brake lining. Emergency braking tests and repeated braking tests are conducted on a self-made drum brake test bench. The difference between the average measured temperature value of the last 10 cycles and the average simulated temperature is between 1.22% and 5.29% at three monitoring points. The final braking test show that increasing the number of repeated braking cycles significantly increases the surface temperature of the brake linings. Brake lining with honeycomb patterns has the shortest braking time.
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