Dynamic response and acoustic fatigue of stiffened composite structureThe results of acoustic fatigue and dynamic response tests performed on L-1011 graphite-epoxy (GrE) aileron and panel components are reported. The aileron featured glass microballoons between the GrE skins. Tests yielded random fatigue data from double and single cantilever coupons and modal data from impedance hammer and loudspeaker impulses. Numerical and sample test data were obtained on combined acoustic and shear loads, acoustic and thermal loads, random fatigue and damping of the integrally stiffened and secondary bonded panels. The fatigue data indicate a fatigue life beyond 10 million cycles. The acoustic data suggested that noise transmission could be enhanced in the integrally stiffened panels, which were more acoustic-fatigue resistant than were the secondary bonded panels.
Document ID
19850030322
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Soovere, J. (Lockheed-California Co. Burbank, CA, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1984
Subject Category
Structural Mechanics
Meeting Information
Meeting: International Conference on Recent Advances in Structural Dynamics