Service Life Prediction of a Low Pressure Turbine Rotor Blade
In this paper, the low cycle fatig ue (LCF)-ereep life prediction of a low pressure turbine rotor blade is carried out based on a three-cycles load spectrum ofa typical mission.A detailed finite element analysis (FEA) is conducted to determine the life limit position of a turbine blade under thermal and centrifugal loading.LCF and crecp rupture life are calculated by means of local stress-strain method and M-S form creep fracture equation respectively.LCF life is calculated by three models.including Manson-Coffin formula, Monrow model and S-W-T model.Furthermore, according to linear cumulative damage theory, the low cycle fatigue-creep life of turbine blades is predicted.Finally, analysis of predictcd life by three different models is conducted based on experimental data.The predicted life by the S-W-T model and M-S form creep fracture equation shows reasonable agreement with the rig testing life,which further illustrates the validity of the method and its applications to this type of low pressure turbine blade.
Low cycle fatigue creep finite element analysis life prediction turbine blade
Li Zhen-lei Shi Duo-qi Yang Xiao-guang Zhou Ming-nan
School of Energy and Power Engineering, Beihang University, Beijing, 100191, China
国际会议
长沙
英文
212-216
2016-10-16（万方平台首次上网日期，不代表论文的发表时间）