INFLUENCE OF REINFORCEMENT FIBERS ON FRICTION INDUCED NOISE OF AUTOMOTIVE DISC BRAKE PAD

Friction noise responses of automotive brake pad composite materials containing different ingredients of reinforcement fibers were investigated to analyze their effect on friction stability. this friction material is composed namely of; resin matrix, reinforcement fibers, filling powders with surface dry lubricants and frictional additives. rock wool fibers were added at different ratios to frictional composite material as a reinforcement to improve its frictional behavior and friction acoustic noise in accordance with wear rate stability. a pin-on-disc tester, sound level meter slm'', and pc ma tlab program have been used to analyze the performance of the tested composite samples using the near field technique measurements of friction noise response. the results obtained of this experimental investigation illustrated that these advanoed friction composite materials, which provided to be used as a braking material in automotive applications. furthermore, high ingredients of rock wool fibers can be used to improve the frictional stability and emission level of the material friction process, while significant signal attenuation has been generated in the high frictional temperature range for high fiber concentrations.