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Fatigue life and bird strike resistance of a composite fan blade for advanced ducted engines.

Ermüdungsfestigkeit und Widerstandsfestigkeit gegen Vogelschlag einer Fanschaufel für zukünftige Manteltriebwerke
 
: Frischbier, J.; Sikorski, S.; Peter, O.

Engineering Materials Advisory Services Ltd. -EMAS-, Cradley Heath:
Durability and structural integrity of airframes. Proceedings of the 17th ICAF-Symposium 1993. Vol.2
Warley, 1993
pp.941-956
International Committee on Aeronautical Fatigue (Symposium) <17, 1993, Stockholm>
English
Conference Paper
Fraunhofer LBF ()
composite material; ducted engine; fan; fatigue life; lap joint; Lebensdauer; Titanlegierung; Triebwerk; turbine blade; Turbinenschaufel; Überlappstoß; Ventilatorschaufel; Verbundwerkstoff

Abstract
A light weight CFRP/titanium fan blade is being investigated by MTU. An overview of the analytical and experimental investigations is given regarding bird strike resistance and fatigue life of the blade root CFRP/metal joint. With 42 CFRP/titanium lap-joint specimens the fatigue life curves for load-controlled tensile loading, load-controlled bending loading and for fully reversed stroke-controlled bending loading were measured. Shooting tests of bird substitute masses on single nonrotating blades were performed simulating a typical bird strike situation at take off operating condition.

: http://publica.fraunhofer.de/documents/PX-14008.html