Improved composite material damping using high damping graphite fibers

George A. Lesieutre, Dana Christiansen, Walt Whatley, Shridhar Yarlagadda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


Increased damping has been demonstrated for graphite/epoxy composite material made using bromine-intercalatefd graphite fiber. A resonant forced-vibration test method was used to measure the damping of unidirectional graphite/epoxy flexural specimens, at frequencies of about 100 hz, and at temperatures ranging from -120 to +30 degrees C. Specimens made from pristine P-100 as well as treated P-100 graphite fibers were characterized. The peak damping ratio observed for the pristine fiber composites was 8 × 10-4 (damping capacity of 1%), while that exhibited by the brominated fiber composites was 16 × 10-4 (damping capacity of 2%). These results are consistent with previous studies of the damping properties of single graphite fibers. Additional theoretical results indicate that, contrary to state-of-the-art composite design principles, the damping of quasi-isotropic composite materials made using these treated graphite fibers could be dominated by fiber damping instead of matrix shear damping.

Original languageEnglish (US)
Title of host publicationComposite Material Technology - 1991
EditorsDavid Hui, Thomas J. Kozik
PublisherPubl by ASME
Number of pages4
StatePublished - 1991
EventProceedings of the 14th Annual Energy-Sources Technology Conference and Exhibition - Houston, TX, USA
Duration: Jan 20 1991Jan 23 1991


OtherProceedings of the 14th Annual Energy-Sources Technology Conference and Exhibition
CityHouston, TX, USA

All Science Journal Classification (ASJC) codes

  • Geology
  • Geotechnical Engineering and Engineering Geology

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