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McClung, R.C., Enright, M.P., Moody, J.P., Lee, Y.-D., Sobotka, J.C., Bhamidipati, V., and McClure, J.W. "Optimal automated fracture risk assessment of 3D gas turbine engine components," Proceedings of the 12th International Conference on Structural Safety and Reliability (ICOSSAR), Vienna, Austria, Aug 6-10, 2017.
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"Some recent advances in engineering fracture modeling for turbomachinery," paper GT2018-75400, Proceedings of the 63rd ASME International Gas Turbine & Aeroengine Technical Congress, Lillestrom, Norway, June 11-15, 2018. McClung, R.C., Lee, Y.-D., Sobotka, J.C., Moody, J.P., Bhamidipati, V., Enright, M.P., Guseman, D.B., and Thomas, C.B. "Influences of non-destructive inspection simulation on fracture risk assessment of additively manufactured turbine engine components," paper GT2018-77058, Proceedings of the 63rd ASME International Gas Turbine & Aeroengine Technical Congress, Lillestrom, Norway, June 11-15, 2018. Papers 2018Įnright, M.P., McClung, R.C., Sobotka, J.C., Moody, J.P., McFarland, J., Lee, Y.-D., Gray, I., and Gray, J.
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Turbine Rotor Material Design, Phase 1 Final Report, FAA Grant 95-G-041, Federal Aviation Administration, Washington, DC. Southwest Research Institute, Allied Signal, General Electric, Pratt & Whitney, Rolls-Royce Allison, Scientific Forming Technologies (2000). Turbine Rotor Material Design, Phase 2 Final Report, FAA Grant 99-G-016, Federal Aviation Administration, Washington, DC.
Does stereology predict fracture of materials crack#
New sub- micrometer resolution probes of crack tip damage will better define features such as crack path crystallography EBSD Stereology and surface morphology high brightness, dual detector SEM, local H concentration IDS and NRA, and validate crack tip mechanics modelling micro-Laue x-ray diffraction and EBSD.Southwest Research Institute, University of Texas at San Antonio, Mustard Seed Software, GE Aviation, Honeywell, Pratt & Whitney, Rolls-Royce Corporation (2008). Contributing mechanisms include high crack tip stresses due to dislocation processes such as strain gradient plasticity, as well as powerful H production and trapping proximate to the electrochemically reacting crack tip surface. Nano-mechanics modeling and experimental results show very high levels of H accumulated in the crack tip fracture process zone, as necessary for interface decohesion. It is necessary to better define conditions within 0.1-5 micronmeter of the crack tip, where dislocations and microstructure dominate continuum mechanics, and chemistry is localized. H diffusion appears to limit rates of cracking for monotonic and cyclic loading however, uncertainadjustable parameters hinder model effectiveness. Micromechanical models of crack tip H localization and damage by decohesion predict important trends in threshold and subcritical crack growth rate behaviour. While intergranular H cracking assisted by impurity segregation can be minimized, other mechanisms promote IG cracking and transgranular H cracking modes have emerged new alloys suffer serious H cracking similar to old materials. Both internal and hydrogen environment assisted cracking continue to seriously limit high performance structural alloys and confound quantitative component prognosis.