Weight Reduction Design of Carbon Fiber Torsion Shaft with Constant Torsional Stiffness for EMU

Finite element analysis(FEA) method was used to design the stiffness of carbon fiber torsion shaft(CFTS). CFTS was prepared by carbon fiber winding process, and tested by torsion stiffness process. The results showed that the torsion stiffness of the CFTS obtained by FEA was 31.08 kN·m²/rad, that the torsion stiffness by testing was 33.52 kN·m²/rad, and that the design error was 7.3%. Therefore, the FEA method could guide the torsional stiffness design of CFTS. Compared with the traditional metal torsion shaft, the weight loss of CFTS reached 74.6%, demonstrating that the weight reduction effect of CFTS was obvious.