A modified nonlinear cumulative damage model for combined high and low cycle fatigue life prediction

Aero‐engine turbine blades are subject to combined high and low cycle fatigue (CCF) loadings during operations. In this paper, a modified nonlinear cumulative damage model is developed based on linear damage accumulation theory and static toughness exhaustion to predict the CCF life of turbine blade...

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Bibliographic Details
Published inFatigue & fracture of engineering materials & structures Vol. 47; no. 4; pp. 1300 - 1311
Main Authors Yue, Peng, Li, He, Dong, Yan, Zhang, Jun‐Fu, Zhou, Chang‐Yu
Format Journal Article
LanguageEnglish
Published Oxford Wiley Subscription Services, Inc 01.04.2024
Subjects
combined high and low cycle fatigue
Cumulative damage
cumulative damage model
Damage accumulation
Damage assessment
Fatigue life
Fatigue tests
High cycle fatigue
interaction damage
Life prediction
Low cycle fatigue
Titanium base alloys
Turbine blades
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Summary:Aero‐engine turbine blades are subject to combined high and low cycle fatigue (CCF) loadings during operations. In this paper, a modified nonlinear cumulative damage model is developed based on linear damage accumulation theory and static toughness exhaustion to predict the CCF life of turbine blades and common blade materials. An interaction factor is created to reflect the integrated effect of high cycle fatigue and low cycle fatigue (HCF‐LCF). Available test data from TC4 alloy and other two alloy materials, together with two turbine blades are utilized to validate the robustness and accuracy of the proposed approach. Comparative results demonstrate that the proposed model holds better performance in life predictions under CCF loadings.
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content type line 14
ISSN:8756-758X
1460-2695
DOI:10.1111/ffe.14236