High-cycle fatigue (HCF) is arguably one of the costliest sources of in-service damage in military aircraft engines. HCF of turbine blades and disks can pose a significant engine risk because fatigue failure can result from resonant vibratory stresses sustained over a relatively short time. A common approach to mitigate HCF risk is to avoid dangerous resonant vibration modes (first bending and torsion modes, etc.) and instabilities (flutter and rotating stall) in the operating range. However, it might be impossible to avoid all the resonance for all flight conditions. In this paper, a methodology is presented to assess the influences of HCF loading on the fracture risk of gas turbine engine components subjected to fretting fatigue. The methodology is based on an integration of a global finite element analysis of the disk-blade assembly, numerical solution of the singular integral equations using the CAPRI (Contact Analysis for Profiles of Random Indenters) and Worst Case Fret methods, and risk assessment using the DARWIN (Design Assessment of Reliability with Inspection) probabilistic fracture mechanics code. The methodology is illustrated for an actual military engine disk under real life loading conditions.
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ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition
June 6–10, 2011
Vancouver, British Columbia, Canada
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-5466-2
PROCEEDINGS PAPER
Probabilistic High-Cycle Fretting Fatigue Assessment of Gas Turbine Engine Components Available to Purchase
Kwai S. Chan,
Kwai S. Chan
Southwest Research Institute®, San Antonio, TX
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Michael P. Enright,
Michael P. Enright
Southwest Research Institute®, San Antonio, TX
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Patrick J. Golden,
Patrick J. Golden
Air Force Research Laboratory, Wright-Patterson AFB, OH
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Samir Naboulsi,
Samir Naboulsi
High Performance Technologies, Inc., Wright-Patterson AFB, OH
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Alan C. Pentz
Alan C. Pentz
NAVAIR, Patuxent River, MD
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Kwai S. Chan
Southwest Research Institute®, San Antonio, TX
Michael P. Enright
Southwest Research Institute®, San Antonio, TX
Patrick J. Golden
Air Force Research Laboratory, Wright-Patterson AFB, OH
Samir Naboulsi
High Performance Technologies, Inc., Wright-Patterson AFB, OH
Ramesh Chandra
NAVAIR, Patuxent River, MD
Alan C. Pentz
NAVAIR, Patuxent River, MD
Paper No:
GT2011-46686, pp. 781-789; 9 pages
Published Online:
May 3, 2012
Citation
Chan, KS, Enright, MP, Golden, PJ, Naboulsi, S, Chandra, R, & Pentz, AC. "Probabilistic High-Cycle Fretting Fatigue Assessment of Gas Turbine Engine Components." Proceedings of the ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition. Volume 6: Structures and Dynamics, Parts A and B. Vancouver, British Columbia, Canada. June 6–10, 2011. pp. 781-789. ASME. https://doi.org/10.1115/GT2011-46686
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