ANALYZING OF MULTI-AXIAL FATIGUE LIFE ON THE NO. 13 COUPLER YOKE

摘要

Based on the local strain method of the single axle stress condition method, the fatigue life method based on the multi-axial stress condition method of the proportional loading is put forword. The AAR loading spectrum and the truck coupling loading spectrum tested in China were adopted to calculate precisely for the No.13 coupler yoke using FEM. The local strain method is right for this question. Fatigue life is attained under different reliability. The result is coincidense with the practice service experience.