Research on Low Cycle Fatigue Response and Life Prediction Improvement Method of 316 Stainless Steels
Based on the fatigue experimental data in the literature at 0.4％,0.8％and 1.0％strain amplitude,the relationship among hardening parameters and strain amplitudes was systematically in-vestigated,and the fitted curves of hardening parameters with respect to strain amplitude were ob-tained.A finite element model was established to reflect the fatigue cycle hysteresis curves,peak stress evolution curves and damage evolution curves.Through numerical simulation combined with the Manson-Coffin equation,fatigue life prediction was carried out at 0.5％,0.7％,0.9％,and 1.2％strain amplitudes respectively.Low cycle fatigue experiments were conducted on 316 stainless steels under strain amplitudes of 0.9％and 1.2％,and the life prediction results were verified.The results indicate that the predicted fatigue response processes are highly consistent with the experimental re-sults,the life prediction error under 0.9％strain amplitude is as 21.1％,and the error under 1.2％strain amplitude is as 5.3％,which proves the accuracy of the fatigue response and life prediction im-provement method.
万方数据
维普
