Research on anti crack mechanism of bionic coupling brake disc

2017 2nd International Seminar on Advances in Materials Science and Engineering

Shi, Lifeng^1 ; Yang, Xiao^1 ; Zheng, Lingnan^1 ; Wu, Can^1 ; Ni, Jing^1

School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou, Zhejiang

310018, China^1

关键词: Biological functions;    Crack opening displacements;    Elastic plastic fracture mechanics;    Fatigue properties;    Maximum temperature;    Residual tensile stress;    Simulation research;    Thermal stress field;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/231/1/012170/pdf
DOI  :  10.1088/1757-899X/231/1/012170

来源: IOP

【 摘 要 】

According to the biological function of fatigue resistance possessed by biology, this study designed a Bionic Coupling Brake Disc (BCBD) which can inhibit crack propagation as the result of improving fatigue property. Thermal stress field of brake disc was calculated under emergency working condition, and circumferential and radial stress field which lead to fatigue failure of brake disc were investigated simultaneously. Results showed that the maximum temperature of surface reached 890°C and the maximum residual tensile stress was 207 Mpa when the initial velocity of vehicle was 200 km/h. Based on the theory of elastic plastic fracture mechanics, the crack opening displacement and the crack front J integrals of the BCBD and traditional brake disc (TBD) with pre-cracking were calculated, and the strength of crack front was compared. Results revealed the growth behavior of fatigue crack located on surface of brake disc, and proved the anti fatigue resistance of BCBD was better, and the strength of crack resistance of BCBD was much stronger than that of TBD. This simulation research provided significant references for optimization and manufacturing of BCBD.