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Damping characteristics of damaged fiber composite componentsDefects in fiber composite components produce changes with respect to the vibrational characteristics of the material. These changes can be recognized in the form of a frequency shift or an alteration of the damping process. The present investigation is concerned with questions regarding the possibility of a utilization of the changes in suitable defect-detecting inspection procedures. A description is given of a method for measuring the damping characteristics of a specimen. This method provides a spectrum of the damping coefficients of the sample as a basis for a comprehensive evaluation of the damping behavior. The correlation between defects and change in the damping characteristics is demonstrated with the aid of results obtained in measurements involving specimens of carbon-fiber composites and a component consisting of glass-fiber-reinforced plastics.
Document ID
19860019524
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Eberle, K. (NASA Headquarters Washington, DC United States)
Date Acquired
September 5, 2013
Publication Date
July 1, 1986
Subject Category
Composite Materials
Report/Patent Number
NASA-TM-88449
NAS 1.15:88449
DGLR-84-159
Accession Number
86N28996
Funding Number(s)
CONTRACT_GRANT: NASW-4005
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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