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Safe structures for future aircraftThe failure mechanisms, design lessons, and test equipment employed by NASA in establishing the airworthiness and crashworthiness of aircraft components for commercial applications are described. The composites test programs have progressed to medium primary structures such as stabilizers and a vertical fin. The failures encountered to date have been due to the nonyielding nature of composites, which do not diffuse loads like metals, and the presence of eccentricities, irregular shapes, stiffness changes, and discontinuities that cause tension and shear. Testing to failure, which always occurred in first tests before the design loads were reached, helped identify design changes and reinforcements that produced successful products. New materials and NDE techniques are identified, together with aircraft structural design changes that offer greater protection to the passengers, fuel antimisting agents, and landing gear systems.
Document ID
19830065132
Document Type
Reprint (Version printed in journal)
Authors
Mccomb, H. G., Jr. (NASA Langley Research Center Structures and Dynamics Div., Hampton, VA, United States)
Date Acquired
August 11, 2013
Publication Date
September 1, 1983
Publication Information
Publication: Astronautics and Aeronautics
Volume: 21
ISSN: 0004-6213
Subject Category
AIRCRAFT DESIGN, TESTING AND PERFORMANCE
Distribution Limits
Public
Copyright
Other