Study on damage fatigue test method of metal materials for rotating machinery

In order to solve the problem that the existing metal material damage fatigue test methods can not accurately test the compression and shear properties of materials, a new metal material damage fatigue test method for rotating machinery is proposed in this paper. The calculation model of mechanical characteristics of metal materials based on impact load is established to calculate the yield moment and the damage fatigue degree of metal test materials. The smaller size Q235 steel material on rotating machinery is selected as the experimental object and the damage fatigue test is designed. The experimental results show that the overall height of the three-dimensional morphology of the fatigue surface is low, and becomes uneven when the number of tensile times increases. It is proved that the damage fatigue test of the proposed method is more accurate and can predict the life and strength of steel under damage.