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Strain rate effects on mechanical properties of fiber composites, part 3An experimental investigation was conducted to determine the strain rate effects in fiber composites. Unidirectional composite specimens of boron/epoxy, graphite/epoxy, S-glass/epoxy and Kevlar/epoxy were tested to determine longitudinal, transverse and intralaminar (in-plane) shear properties. In the Longitudinal direction the Kevlar/epoxy shows a definite increase in both modulus and strength with strain rate. In the transverse direction, a general trend toward higher strength with strain rate is noticed. The intralaminar shear moduli and strengths of boron/epoxy and graphite/epoxy show a definite rise with strain rate.
Document ID
19770004173
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Daniel, I. M. (IIT Research Inst. Chicago, IL, United States)
Liber, T. (IIT Research Inst. Chicago, IL, United States)
Date Acquired
September 3, 2013
Publication Date
June 1, 1976
Subject Category
Composite Materials
Report/Patent Number
NASA-CR-135087
IITRI-D6073-4
Report Number: NASA-CR-135087
Report Number: IITRI-D6073-4
Accession Number
77N11116
Funding Number(s)
CONTRACT_GRANT: NAS3-16766
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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