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The dynamic behaviour of postbuckled composite plates under acoustic excitationThe Rayleigh-Ritz method was used to find the postbuckling static displacement pattern of a composite plane (CFRP) under uniaxial in-plane compression of uniform edge-shortening. The resonance frequencies and mode shapes at various postbuckled states are then evaluated by eigenvalue analysis of the dynamical matrix equation consisting of up-dated tangential stiffness matrix at corresponding static configuration. The theoretical results are compared with experimental results obtained in 16-layered CFRP laminate of aspect ratio 1.5. The resonance frequencies and mode shapes obtained are used to interpret the multimodal and nonlinear strain responses to high level of acoustic excitation. The dominance of second-mode contribution and softening-spring behavior are found in the strain response of postbuckled plates.
Document ID
19880044617
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Ng, C. F.
(NASA Langley Research Center Hampton, VA; Southampton, University, United Kingdom)
White, R. G.
(Southampton, University United Kingdom)
Date Acquired
August 13, 2013
Publication Date
January 1, 1988
Publication Information
Publication: Composite Structures
Volume: 9
Issue: 1, 19
ISSN: 0263-8223
Subject Category
Structural Mechanics
Accession Number
88A31844
Distribution Limits
Public
Copyright
Other

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