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Nondestructive determination of fatigue crack damage in composites using vibration tests.The vibration response of glass reinforced epoxy and polyester laminates was investigated. The complex modulus and the damping capacity were measured as fatigue crack damage accumulated. Changes in the Young's modulus as well as the damping capacity correlated with the amount of crack damage. The damping was especially sensitive to debonding of the reinforcement from the resin matrix. Measurement of these vibration response changes shows promise as a means to nondestructively test the structural integrity of filament-reinforced composite structural members.
Document ID
19720049652
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Dibenedetto, A. T.
Gauchel, J. V.
Thomas, R. L.
Barlow, J. W.
(Washington University St. Louis, Mo., United States)
Date Acquired
August 6, 2013
Publication Date
June 1, 1972
Publication Information
Publication: Journal of Materials
Volume: 7
Subject Category
Materials, Nonmetallic
Accession Number
72A33318
Funding Number(s)
CONTRACT_GRANT: N00014-67-C-0218
CONTRACT_GRANT: NGR-26-008-063
Distribution Limits
Public
Copyright
Other

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