Turbine attachments in the aero-engine are generally subjected to combined high and low cycle fatigue (CCF) loadings, i.e., low cycle fatigue (LCF) loading due to centrifugal and thermal loading stresses superimposed to the aerodynamically induced high cycle fatigue (HCF) loading. The primary focus of this study is to predict the crack growth life for the actual full-scale turbine attachment through experimentally examining the crack growth behavior under CCF loading at elevated temperature. The crack closure effect was first investigated by using the corner-notched (CN) specimen cut from the turbine attachment since the stress state of CN specimen is more similar to turbine attachment than compact tension (CT) specimen. Employing digital image correlation (DIC) technique, the level of crack closure of CN specimen was clarified under different stress ratios (R) for LCF loading. Afterward, a CCF crack growth model for the full-scale turbine attachment was proposed, which takes the crack closure effect, time-independent crack increment, and transient vibrational analysis into account. In order to verify the proposed method, a Ferris wheel system was established to conduct CCF test on the full-scale turbine attachment at elevated temperature. This study provides an effective methodology to predict the fatigue crack growth (FCG) life of full-scale turbine attachment under CCF loading.
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September 2019
Research-Article
Crack Growth Behavior of Full-Scale Turbine Attachment Under Combined High and Low Cycle Fatigue
Dianyin Hu,
Dianyin Hu
School of Energy and Power Engineering,
Beihang University,
Beijing 100191, China;
Collaborative Innovation Center of
Advanced Aero-Engine,
Beijing 100191, China;
Beijing Key Laboratory of Aero-Engine
Structure and Strength,
Beijing 100191, China
Beihang University,
Beijing 100191, China;
Collaborative Innovation Center of
Advanced Aero-Engine,
Beijing 100191, China;
Beijing Key Laboratory of Aero-Engine
Structure and Strength,
Beijing 100191, China
Search for other works by this author on:
Lin Yan,
Lin Yan
School of Energy and Power Engineering,
Beihang University,
Beijing 100191, China
Beihang University,
Beijing 100191, China
Search for other works by this author on:
Ye Gao,
Ye Gao
School of Energy and Power Engineering,
Beihang University,
Beijing 100191, China
Beihang University,
Beijing 100191, China
Search for other works by this author on:
Jianxing Mao,
Jianxing Mao
School of Energy and Power Engineering,
Beihang University,
Beijing 100191, China
Beihang University,
Beijing 100191, China
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Rongqiao Wang
Rongqiao Wang
School of Energy and Power Engineering,
Beihang University,
Beijing 100191, China;
Collaborative Innovation Center of
Advanced Aero-Engine,
Beijing 100191, China;
Beijing Key Laboratory of Aero-Engine
Structure and Strength,
Beijing 100191, China
e-mail: wangrq@buaa.edu.cn
Beihang University,
Beijing 100191, China;
Collaborative Innovation Center of
Advanced Aero-Engine,
Beijing 100191, China;
Beijing Key Laboratory of Aero-Engine
Structure and Strength,
Beijing 100191, China
e-mail: wangrq@buaa.edu.cn
1Corresponding author.
Search for other works by this author on:
Dianyin Hu
School of Energy and Power Engineering,
Beihang University,
Beijing 100191, China;
Collaborative Innovation Center of
Advanced Aero-Engine,
Beijing 100191, China;
Beijing Key Laboratory of Aero-Engine
Structure and Strength,
Beijing 100191, China
Beihang University,
Beijing 100191, China;
Collaborative Innovation Center of
Advanced Aero-Engine,
Beijing 100191, China;
Beijing Key Laboratory of Aero-Engine
Structure and Strength,
Beijing 100191, China
Lin Yan
School of Energy and Power Engineering,
Beihang University,
Beijing 100191, China
Beihang University,
Beijing 100191, China
Ye Gao
School of Energy and Power Engineering,
Beihang University,
Beijing 100191, China
Beihang University,
Beijing 100191, China
Jianxing Mao
School of Energy and Power Engineering,
Beihang University,
Beijing 100191, China
Beihang University,
Beijing 100191, China
Rongqiao Wang
School of Energy and Power Engineering,
Beihang University,
Beijing 100191, China;
Collaborative Innovation Center of
Advanced Aero-Engine,
Beijing 100191, China;
Beijing Key Laboratory of Aero-Engine
Structure and Strength,
Beijing 100191, China
e-mail: wangrq@buaa.edu.cn
Beihang University,
Beijing 100191, China;
Collaborative Innovation Center of
Advanced Aero-Engine,
Beijing 100191, China;
Beijing Key Laboratory of Aero-Engine
Structure and Strength,
Beijing 100191, China
e-mail: wangrq@buaa.edu.cn
1Corresponding author.
Manuscript received February 28, 2018; final manuscript received March 27, 2019; published online May 6, 2019. Assoc. Editor: Damian M. Vogt.
J. Eng. Gas Turbines Power. Sep 2019, 141(9): 091002 (10 pages)
Published Online: May 6, 2019
Article history
Received:
February 28, 2018
Revised:
March 27, 2019
Citation
Hu, D., Yan, L., Gao, Y., Mao, J., and Wang, R. (May 6, 2019). "Crack Growth Behavior of Full-Scale Turbine Attachment Under Combined High and Low Cycle Fatigue." ASME. J. Eng. Gas Turbines Power. September 2019; 141(9): 091002. https://doi.org/10.1115/1.4043555
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