Research on the Performance of SiC Particle Reinforced Aluminum Matrix Composite Brake Discs

Xiangling Wang; Xiaoling Shi; Zekai Qin

doi:10.6911/WSRJ.202603_12(3).0009

Authors

Xiangling Wang
Xiaoling Shi
Zekai Qin

DOI:

https://doi.org/10.6911/WSRJ.202603_12(3).0009

Keywords:

Liquid stirring casting method, Thermal cycling characteristics, Crack propagation, Finite element simulation analysis, Fracture failure mechanism, Fatigue life

Abstract

To meet the performance requirements of wear resistance, energy saving and consumption reduction during operation, as well as speed and noise reduction for rail transit brake discs, a SiC_p/A356 composite material with a SiC particle volume fraction of 20% was prepared by liquid stirring casting method using SiC particles as reinforcement and A356 aluminum alloy as matrix. Firstly, experiments were conducted on the thermal cycling characteristics, crack propagation, and fracture performance of the high-speed train brake disc made of this material. Secondly, a brake disc model was established using HYPERMESH software. Then, finite element simulation analysis of the temperature and stress fields under emergency braking conditions at 200km/h was conducted using ANSYS software to study the fracture failure mechanism. Compared with traditional steel brake discs, the results show that the maximum temperature during the braking process of SiC_p/A356 reinforced aluminum based composite brake discs is reduced by 29.6% compared to ordinary steel materials; The amplitude of stress changes is small, which can effectively reduce thermal damage to the surface of the brake disc; The fatigue life is increased by about 20% compared to ordinary steel materials, exhibiting excellent mechanical and fatigue properties.

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