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Dynamic fatigue reliability analysis of turbine blades under combined high and low cycle loadings
International Journal of Damage Mechanics ( IF 4.2 ) Pub Date : 2021-01-17 , DOI: 10.1177/1056789520986854
Peng Yue 1 , Juan Ma 1 , Changhu Zhou 1 , Jean W Zu 2 , Baoquan Shi 1
Affiliation  

Establishment of damage accumulation models for reflecting the combined damage mechanism on the fatigue behavior of aero-engine turbine blades is crucial for their safety. In this work, a novel combined high and low cycle fatigue (CCF) life prediction methodology is presented as a basis of that to consider the interaction between low and high cycle fatigues. Accordingly, a dynamic reliability model is proposed to study the operational reliability of turbine blades under CCF loadings. Moreover, experimental data of materials along with the collected field data from the actual turbine blades are applied to validate the CCF life prediction model and the dynamic reliability model. The validation of the results is conducted by a comparison analysis, which indicates that the proposed life prediction method yields better accuracy, while the dynamic reliability model is proved to be more in line with the outcomes derived by the Monte Carlo simulation.



中文翻译:

高低循环荷载作用下涡轮叶片的动态疲劳可靠性分析

建立损伤累积模型以将组合损伤机理反映在航空发动机涡轮叶片的疲劳行为上,对于其安全至关重要。在这项工作中,提出了一种新颖的高,低周疲劳组合(CCF)寿命预测方法,作为考虑低,高周疲劳之间相互作用的基础。因此,提出了一种动态可靠性模型来研究CCF载荷下涡轮叶片的运行可靠性。此外,材料的实验数据以及从实际涡轮机叶片收集的现场数据被用于验证CCF寿命预测模型和动态可靠性模型。通过比较分析对结果进行验证,这表明所提出的寿命预测方法产生了更高的准确性,

更新日期:2021-01-18
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