An energy based fatigue damage and lifing assessment method is developed for a high temperature material, Inconel 625, and Aluminum 6061-T6. A newly developed experimental method is used for interrogating accumulated fatigue damage and evolution for low and high cycle fatigue (LCF/HCF) at continuum scales. The proposed fatigue lifing assessment method is based on assessing the total strain energy dissipated to cause fatigue failure of a material, known as the fatigue toughness. From the fatigue toughness and experimentally determined fatigue lives at two different stress amplitudes, the cyclic parameters of the Ramberg-Osgood constitutive equation that describes the hysteresis stress-strain loop of a cycle are determined. Stress controlled mechanical fatigue tests are performed to construct room temperature stress-life (S-N) curves and to determine damage progression based on accumulated fatigue damage. The predicted fatigue life obtained from the present energy based approach is found in good agreement with experimental data.
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ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition
June 26–30, 2017
Charlotte, North Carolina, USA
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-5092-3
PROCEEDINGS PAPER
Development of a Fatigue Damage and Lifing Assessment Method for Inconel 625 and Aluminum 6061-T6 Available to Purchase
Dino Celli,
Dino Celli
Ohio State University, Columbus, OH
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M.-H. Herman Shen,
M.-H. Herman Shen
Ohio State University, Columbus, OH
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Onome Scott-Emuakpor,
Onome Scott-Emuakpor
AFRL, Wright-Patterson AFB, OH
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Casey Holycross
Casey Holycross
AFRL, Wright-Patterson AFB, OH
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Dino Celli
Ohio State University, Columbus, OH
M.-H. Herman Shen
Ohio State University, Columbus, OH
Tommy George
AFRL, Wright-Patterson AFB, OH
Onome Scott-Emuakpor
AFRL, Wright-Patterson AFB, OH
Casey Holycross
AFRL, Wright-Patterson AFB, OH
Paper No:
GT2017-63775, V07AT31A006; 7 pages
Published Online:
August 17, 2017
Citation
Celli, D, Shen, MH, George, T, Scott-Emuakpor, O, & Holycross, C. "Development of a Fatigue Damage and Lifing Assessment Method for Inconel 625 and Aluminum 6061-T6." Proceedings of the ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. Volume 7A: Structures and Dynamics. Charlotte, North Carolina, USA. June 26–30, 2017. V07AT31A006. ASME. https://doi.org/10.1115/GT2017-63775
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