Study on Fatigue Performance of Three-Roll Skew Rolling Hollow Axle

To explore and predict the fatigue performance of three-roll skew rolling (TRSR) hollow axle, a combination of experimental and numerical simulation methods was used to carry out research. First, the heat treatment of TRSR hollow axle was carried out, and the metallographic test and tensile test were carried out on its specimens. Second, the rotating bending fatigue test was carried out on the specimen, and the S-N curve was obtained by data processing. Third, combined with ABAQUS and FE-SAFE, a fatigue life prediction model was created to predict the specimen life. Fourth, the fracture analysis of the specimen was carried out to determine the fracture reason. The results show that the fatigue performance of TRSR hollow axle is better than most of the hollow axle on the market, and the fatigue life prediction model can reasonably predict the fatigue life of the specimen.