Prediction of Crack Propagation Life of Cast Steel Brake Disc of EMU

doi:10.3901/JME.2018.24.154

Abstract

Abstract: In order to study the extended life of the cast steel brake disk of EMU, a-rotationally symmetrical 3D transient calculation model is established for brake disc. According to the material parameters of the cast steel material of the EMU, finite element analysis software ANSYS is utilized and indirect coupling method is adopted to simulate the instantaneous temperature filed and thermal-stress distribution produced by frictional heat load of brake disk. The calculated results are used as loads which are input into the NASGRO to analyze and calculate the crack propagation rate and the extended life. The simulation result illustrates that the stress intensity factor and crack growth rate at the tip of the radial crack length of the brake disc is higher than that at the tip of the depth; It is calculated that the crack propagation life of brake disc is 48 831 times. It provids a valuable reference for the use of the brake disc.

Key words: brake disc, crack propagation life, NASGRO, stress intensity factor, thermal stress

CLC Number:

U270

ZHOU Suxia, ZHAO Xinghan, SUN Chenlong, SUN Rui. Prediction of Crack Propagation Life of Cast Steel Brake Disc of EMU[J]. Journal of Mechanical Engineering, 2018, 54(24): 154-159.

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