Computer Simulation Study on Fatigue Life of Blades

According strain energy principle, derive a strain energy identity method for calculating local stress and strain history using computer analysis techniques. Using CAE simulation software, calculate the stress and strain history of perforated thin plates under constant amplitude load concentration. Comparison of Calculation Results between Elastic Plastic Finite Element Method and Local Stress Strain Method Using Computer Analysis Techniques. The results show that when the stress is less than the tensile strength of the material at 895Mpa, the maximum relative error of the strain history calculated by the strain energy identity method is 8.6%, and the maximum average stress error is 12%, which is close to the results of the local stress-strain method. Based on CAE simulation technology, analyze the local strain fatigue life of blade/tenon throat, indicating that its maximum stress has exceeded the yield limit of the material.