YU Haifeng, WU Xingwen, LIANG Shulin, et al. Study on Stress Intensity Factors of EMU Hollow Axles[J]. Mechanical Science and Technology for Aerospace Engineering, 2024, 43(1): 117-124.
YU Haifeng, WU Xingwen, LIANG Shulin, et al. Study on Stress Intensity Factors of EMU Hollow Axles[J]. Mechanical Science and Technology for Aerospace Engineering, 2024, 43(1): 117-124.DOI: 10.13433/j.cnki.1003-8728.20220144.
In order to study the stress intensity factors (SIFs) for hollow axle of EMU
the influencing factors of the axle SIFs were firstly analyzed. The finite element model for axle with crack was established
and the superposition method was used to evaluate SIFs under different loads. Then
the SIFs were calculated by using the stress extrapolation method (SEM) and displacement extrapolation method (DEM)
and the calculation results were compared with that by using the shape factor formula method. Finally
a fifth-order polynomial was used to fit the shape factor function according to the general analytical formula of SIFs and calculation results via DEM. The applicability of the shape factor function and the analytical formula was verified by setting the different crack depths and loads. The results indicated the present method had certain reference value for calculating SIFs of axle under the same load mode.