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Fuel containment and damage tolerance in large composite primary aircraft structures. Phase 2: TestingTechnical issues associated with fuel containment and damage tolerance of composite wing structures for transport aircraft were investigated. Material evaluation tests were conducted on two toughened resin composites: Celion/HX1504 and Celion/5245. These consisted of impact, tension, compression, edge delamination, and double cantilever beam tests. Another test series was conducted on graphite/epoxy box beams simulating a wing cover to spar cap joint configuration of a pressurized fuel tank. These tests evaluated the effectiveness of sealing methods with various fastener types and spacings under fatigue loading and with pressurized fuel. Another test series evaluated the ability of the selected coatings, film, and materials to prevent fuel leakage through 32-ply AS4/2220-1 laminates at various impact energy levels. To verify the structural integrity of the technology demonstration article structural details, tests were conducted on blade stiffened panels and sections. Compression tests were performed on undamaged and impacted stiffened AS4/2220-1 panels and smaller element tests to evaluate stiffener pull-off, side load and failsafe properties. Compression tests were also performed on panels subjected to Zone 2 lightning strikes. All of these data were integrated into a demonstration article representing a moderately loaded area of a transport wing. This test combined lightning strike, pressurized fuel, impact, impact repair, fatigue and residual strength.
Document ID
19880016068
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Sandifer, J. P. (Lockheed-California Co. Burbank, CA, United States)
Denny, A. (Lockheed-California Co. Burbank, CA, United States)
Wood, M. A. (Lockheed-California Co. Burbank, CA, United States)
Date Acquired
September 5, 2013
Publication Date
April 1, 1985
Subject Category
Aircraft Design, Testing And Performance
Report/Patent Number
NASA-CR-172519
NAS 1.26:172519
Accession Number
88N25452
Funding Number(s)
CONTRACT_GRANT: NAS1-16856
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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