SYMPOSIA PAPER Published: 01 January 1977
STP27973S

Effects of Moisture and Fatigue on the Residual Mechanical Properties of S-Glass/Graphite/Epoxy Hybrid Composites

Source

The static mechanical properties of S-glass/high-strength graphite/ epoxy hybrid composites were investigated before and after exposure to high humidity for 1000 h. Graphite-to-glass ratios of 0, ∞, 1, and 2 were studied. Both unidirectional (0 deg) and quasi-isotropic fiber orientations were studied.

In general, the stress cycling caused a decline in the static tensile strength, an increase in the Poisson's ratio, and no change whatever in the elastic modulus of the base and hybrid composites. The addition of moisture did not result in a basic alteration in the behavior of the hybrid or base composites after stress cycling.

Author Information

Hofer, KE
Illinois Institute of Technology Research Institute, Chicago, Ill
Bennett, LC
Illinois Institute of Technology Research Institute, Chicago, Ill
Stander, M
Naval Air Systems Command, Washington, D. C.
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Details
Developed by Committee: D30
Pages: 103–122
DOI: 10.1520/STP27973S
ISBN-EB: 978-0-8031-4708-9
ISBN-13: 978-0-8031-0347-4