Carbon Fiber Composites for Cryogenic Filament-Wound Vessels.
Summary rept. Jul 70-Jul 71,
NAVAL ORDNANCE LAB WHITE OAK MD
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Advanced unidirectional and bidirectional carbon fiberepoxy resin composites were evaluated for physical and mechanical properties over a cryogenic-to-room- temperature range for potential application to cryogenic vessels. The results showed that Courtaulds HTS carbon fiber was the superior fiber in terms of cryogenic strength properties in epoxy composites. Of the resin systems tested in NOL Ring composites, CTBNERLB 4617 exhibited the highest composite strengths at cryogenic temperatures but very low interlaminar shear strengths at room temperature. Tests of unidirectional and bidirectional composite bars showed that the Epon 828Empol 1040 resin was better at all test temperatures, with the CTBNERLB 4617 composites giving somewhat unpredictable results. Neither fatigue cycling nor thermal shock had a significant effect on composite strengths or moduli. Thermal expansion measurements gave negative values in the fiber direction and positive values in the transverse direction of the composites. Author, modified-PL
- Laminates and Composite Materials
- Containers and Packaging