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Buckling of a fiber bundle embedded in epoxyBuckling of a fiber bundle embedded in epoxy resin was studied to gain insight into compressive failure mechanisms in unidirectional composites. The fibers used were E-glass, T300 graphite, T700 graphite, and P75 graphite. These fibers were combined with two different resins: Epon 815/V140 and Epon 828/Z. In both resins the failure mode of the bundle was found to be microbuckling of fibers for the first three types of fibers; however, the high-modulus P75 fibers failed in shear without any sign of microbuckling. The strains at which microbuckling occurred were higher than the compressive failure strains of the corresponding unidirectional composites. In the soft resin, Epon 815/V140, fibers buckled at lower strains than in the stiff resin, Epon 828/Z. The buckling strains and the segment lengths followed the trends predicted for a single filament embedded in an infinite matrix.
Document ID
19870033910
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Hahn, H. T.
(Washington Univ. Saint Louis, MO, United States)
Sohi, M. M.
(Washington University Saint Louis, MO, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1986
Publication Information
Publication: Composites Science and Technology
Volume: 27
Issue: 1 19
ISSN: 0266-3538
Subject Category
Composite Materials
Accession Number
87A21184
Funding Number(s)
CONTRACT_GRANT: NAG1-295
Distribution Limits
Public
Copyright
Other

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