Accession Number : AD0743470

Title :   Carbon Fiber Composites for Cryogenic Filament-Wound Vessels.

Descriptive Note : Summary rept. Jul 70-Jul 71,

Corporate Author : NAVAL ORDNANCE LAB WHITE OAK MD

Personal Author(s) : Larsen,James V. ; Simon,Robert A.

Report Date : 02 MAY 1972

Pagination or Media Count : 34

Abstract : Advanced unidirectional and bidirectional carbon fiber/epoxy 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, CTBN/ERLB 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 828/Empol 1040 resin was better at all test temperatures, with the CTBN/ERLB 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)

Descriptors :   (*COMPOSITE MATERIALS, *CARBON FIBERS), (*CRYOGENICS, COMPOSITE MATERIALS), (*REINFORCED PLASTICS, FILAMENT WOUND CONSTRUCTION), EPOXY RESINS, PRESSURE VESSELS, MECHANICAL PROPERTIES, LOW TEMPERATURE, SPACECRAFT

Subject Categories : Laminates and Composite Materials
      Containers and Packaging

Distribution Statement : APPROVED FOR PUBLIC RELEASE