NDLI: Impact resistance of spar-shell composite fan blades

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Impact resistance of spar-shell composite fan blades

Content Provider	NASA Technical Reports Server (NTRS)
Author	Graff, J. Stoltze, L. Varholak, E. M.
Copyright Year	1973
Description	Composite spar-shell fan blades for a 1.83 meter (6 feet) diameter fan stage were fabricated and tested in a whirling arm facility to evaluate foreign object damage (FOD) resistance. The blades were made by adhesively bonding boron-epoxy shells on titanium spars and then adhesively bonding an Inconel 625 sheath on the leading edge. The rotating blades were individually tested at a tip speed of 800 feet per second. Impacting media used were gravel, rivets, bolt, nut, ice balls, simulated birds, and a real bird. Incidence angles were typical of those which might be experienced by STOL aircraft. The tests showed that blades of the design tested in this program have satisfactory impact resistance to small objects such as gravel, rivets, nuts, bolts, and two inch diameter ice balls. The blades suffered nominal damage when impacted with one-pound birds (9 to 10 ounce slice size). However, the shell was removed from the spar for a larger slice size.
File Size	7200716
Page Count	47
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19740008473
Archival Resource Key	ark:/13960/t9q28ph2g
Language	English
Publisher Date	1973-07-01
Access Restriction	Open
Subject Keyword	Structural Mechanics Propeller Blades Propeller Fans Epoxy Resins Titanium Impact Resistance Birds Impact Tests Flight Hazards Composite Structures Foreign Bodies Impact Tolerances Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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