Fatigue Life Prediction of Fan Blade Using Nominal Stress Method and Cumulative Fatigue Damage Theory

Fan blade is one of the key parts used in aircraft engine and its failure is mainly caused by fatigue fracture. This paper aims to predict fatigue life of fan blade during its service operation. First, the effective load and stress of fan blade are obtained by using finite element analysis and simul...

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Bibliographic Details
Published inInternational journal of turbo & jet-engines Vol. 37; no. 2; pp. 135 - 139
Main Authors Huang, Hong-Zhong, Huang, Cheng-Geng, Peng, Zhaochun, Li, Yan-Feng, Yin, Hengsu
Format Journal Article
LanguageEnglish
Published Berlin De Gruyter 25.09.2020
Walter de Gruyter GmbH
Subjects
46.50.+a
62.20. M
62.20. Me
83.50.-v
Aircraft engines
Crack propagation
Cumulative fatigue damage theory
curve
Damage accumulation
Fan blade
Fatigue failure
Fatigue life
Finite element method
Life prediction
Material properties
Nominal stress method
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Summary:Fan blade is one of the key parts used in aircraft engine and its failure is mainly caused by fatigue fracture. This paper aims to predict fatigue life of fan blade during its service operation. First, the effective load and stress of fan blade are obtained by using finite element analysis and simulation. Second, the fatigue notch factor of fan blade is determined by using the nominal stress method. Then, the material properties of fan blade are used to correct and obtain the curve of fan blade. Finally, according to the actual load spectrum of three working loading cycles in 900h, the Miner’s damage accumulation rule is employed to predict the fatigue life of fan blade.
ISSN:0334-0082
2191-0332
DOI:10.1515/tjj-2017-0015