Experimental Study on the Effect of Groove-Textured Surface on the Friction-Induced Noise of Brake Disc Materials

Groove-textured surfaces with different widths were manufactured on train brake disc materials,the grooves were distributed radially at regular angle intervals. The influence of groove-textured surfaces on friction-induced noise was experimentally studied in a pad-on-disc (flat-on-flat) configuration by using brake pad materials of train as the counterface. The results show that the grooves with specific parameters can suppress the squeal effectively. On one hand the grooves allowed an easier wear debris escape and consequently a lower squeal tendency,and on the other hand the collision between the edges of the grooves and the flat specimen can effectively suppress the high-frequency of friction-induced vibration and reduce the sound pressure. The edges of grooves remained nearly unaffected after the test,suggesting that the squeal can be suppressed effectively for a long period.