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Design of Jet Engine Rotors for Long Life
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English
Abstract
Jet engine rotors are the most highly stressed large volumes of material in the engine. They possess millions of inch pounds of kinetic energy at normal speeds. Considerable care in design and analysis must be taken to ensure that the parts do not fail over the full life cycle of the engine. In this paper, major design criteria are identified and discussed, with special emphasis on the long-life aspects of disk design methodology. The role of fracture mechanics is discussed as it applies to intrinsic material defects as well as the residual life of the part after crack initiation. Future trends, including the impact of powder metallurgy on design, and retirement of disks for cause are discussed.
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Citation
Sattar, S. and Hill, J., "Design of Jet Engine Rotors for Long Life," SAE Technical Paper 750619, 1975, https://doi.org/10.4271/750619.Also In
References
- Snyder L.E. Comerford G.L. “Supersonic Unstalled Flutter in Fan Rotor; Analytical and Experimental Results.” ASME paper No. 74-GT-40 1974
- Sattar S.A. Sundt C.V. “Gas Turbine Disk Cyclic Life Prediction.” AIAA Journal
- Miner M.A. “Cumulative Damage Fatigue.” Journal of Applied Mechanics 12 1945
- Manson S.S. et al. “Application of a Double Linear Damage Rule to Cumulative Fatigue.” NASA, TDN-3839
- Dowling N.E. “Fatigue Failure Predictions for Complicated Stress-Strain Histories.” Journal of Materials, ASTM 7 1 March 1 1972
- Cruse T.A. Besuner P.M. “Residual Life Predictions for Surface Cracks in Complex Structural Details.” Symposium on Propulsion System Structural Integration and Engine Integrity Monterey, California September 1974