Investigation on Design and Tribological Properties of Synthetic Pads Paired with SiCp/A356 Brake Disc

doi:10.3901/JME.2025.19.170

Abstract

Abstract: The friction pair of SiCp/A356 brake disc and synthetic brake pads often have problems such as friction surface scratches and brake noise during braking. The synthetic brake pads paired with SiCp/A356 brake discs are selected as the research object. Structural optimization design of the synthetic brake pad and friction characteristics of different synthetic brake pad materials are investigated using a combination of scale bench testing and simulation methods. Scale bench tests reveal that debris accumulation in radial grooves on both sides of the brake pads is more severe than in circumferential grooves, while accumulation in the cut end exceeds that in the non-cut end. Through flow field simulation analysis, airflow in the vortex airflow region within pad grooves is identified as insufficient, leading to debris accumulation tendencies. Response surface analysis based on orthogonal testing and Box-Behnken test design is employed to optimize pad structure design, aiming to enhance air mass flow rate without reducing convective heat transfer coefficient. The optimized synthetic pad increases the air mass flow rate by 28.22%, the convective heat transfer coefficient by 1.34%, the performance of chip removal and heat dissipation are improved, the coefficient of tendency of instability is decreased by 49.53%, and brake noise tendency is reduced. Friction matching between SiCp/A356 composites and three synthetic materials is examined using the optimized brake pads structure. FANY and 928W materials are found to maintain stable third body layers, demonstrate low wear rates, and exhibit stable average friction coefficients, with FANY material showing the lowest braking noise levels.

Key words: synthetic pads, structural design, flow field analysis, subscale test, tribological properties

CLC Number:

TB12

YANG Zhiyong, LI Peizhen, YE Shanshan, WANG Jialin, LI Zhiqiang. Investigation on Design and Tribological Properties of Synthetic Pads Paired with SiCp/A356 Brake Disc[J]. Journal of Mechanical Engineering, 2025, 61(19): 170-182.

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