Abstract：Gas turbine blades are susceptible to fatigue failure due to asymmetric cyclic loads in the actual working process. In order to accurately predict the crack initiation and propagation life of the blade material under asymmetric cyclic loading, the Chaboche model was modified by considering the average stress effect and plastic deformation effect in the high-stress zone. Then a comprehensive model was established to predict crack initiation and propagation life under asymmetric cyclic loading by combining the modified Chaboche model with Walker’s crack propagation formula. The test data was used for verification and analysis. The results show that the crack initiation life and crack propagation life predicted by the model are consistent with the test data, which verifies the applicability and accuracy of the new model. The comprehensive model lays a theoretical foundation for the damage analysis and life prediction of blades in gas turbine.
李洪松1，刘永葆1，贺星1，杨涛2，殷望添1. 非对称循环加载下燃气轮机叶片材料疲劳寿命预测[J]. 振动与冲击, 2022, 41(12): 152-158.
LI Hongsong1,LIU Yongbao1,HE Xing1,YANG Tao2,YIN Wangtian1. Fatigue life prediction of gas turbine blade materials under asymmetric cyclic loading. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(12): 152-158.
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