Modeling and Simulation of Macroscopic Friction Coefficient of Brake Pair Considering Particle Flows and Interface Parameters

Authors：Liu, Shuaikang; Wei, Daogao^*; Zhang, Bingzhan; Zhang, Liang; Wu, Di; Wang, Wei

Source：Journal of Vibration Engineering & Technologies, 2023, 11(5): 2133-2153.

DOI：10.1007/s42417-022-00692-9

• Disc brake pair
• Finite element
• Particle
• Macroscopic friction coefficient
• The friction model

Purpose In this paper, a three-dimensional model of the disc brake pair considering the particle flows is firstly established, and the finite element simulation analysis of the brake pair friction performance is carried out to obtain the influence law of different braking parameters on the macroscopic friction coefficient and standard deviation. Methods The macroscopic friction coefficient in the interface of brake pairs decreases from 0.4 to 0.152 with the increase of particle size, from 0.4 to 0.131 with the increase of particle density, and from 0.028 to 0.385 with the increase of rough peak radius of brake block. It was also found that the macroscopic friction coefficient gradually increased with the increase of the ratio of the rough peak radius of the brake block to the particle size, and the friction coefficient changed most drastically at its size ratio of about 1.5. By analyzing the change mechanism of the brake pair friction performance, it is believed that it is related to the embedding and deformation of the third body particles, and the simulation results are verified by bench tests. Results Finally, a macroscopic friction coefficient model considering the third body particles and interface parameters were established, and the steady-state macroscopic friction coefficients under different braking parameters were calculated, and the R-square values of the models were above 0.9. Conclusion This study can provide a reference for the braking pair friction algorithm of intelligent vehicles driving in sandy and dusty road conditions.