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GE90 Fan Blade Service Experience and Repair(GE90风扇叶片服务和维修经验)
GE90 Fan Blade Service Experience and Repair Phil Griggs Michael H. Schneider FAA/EASA/Industry Composite Damage Tolerance and Maintenance Workshop Amsterdam, Netherlands May 10, 2007 1 / 9 FAA/EASA/Ind DTMaint Workshop May 10, 2007 GE90 Composite Fan Blade • GE90 fan blade is an all composite (carbon / toughened epoxy) design • Extensive material design allowables program conducted • Blade geometry driven primarily by aerodynamics (performance), aeromechanics (stability), impact (bird strike), low cycle fatigue (CF loads) and high cycle fatigue (vibratory response) • Certification test requirements included … Operability – surge and stall; blade vibration Induction system icing Bird ingestion – 2.5 lb., 5.5 lb. and 8 lb. birds Foreign object ingestion – hail, water, ice slab Blade containment 2x overload (141% speed) Lightning strike • Many of the engineering and certification tests included environmental exposure and effects of defects (mfg. defects and simulated handling damage) 2 / 9 FAA/EASA/Ind DTMaint Workshop May 10, 2007 Fan Blade Service Experience(1) “Single” Bird Fan Blade Comparison “Multiple” Bird “Single” Bird “Multiple” Bird Ingestion Event
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