Accession Number : ADA306039

Title :   High Performance Fiber/Epoxy Composite Pressure Vessels.

Descriptive Note : Interim rept. 1974-1976,

Corporate Author : CALIFORNIA UNIV LIVERMORE RADIATION LAB

Personal Author(s) : Chiao, T. T. ; Hamstad, M. A. ; Jessop, E. S. ; Toland, R. H.

PDF Url : ADA306039

Report Date : 12 DEC 1978

Pagination or Media Count : 50

Abstract : During the 1974-1976 report period our principal efforts were directed in the following areas: (1) determining the applicability of an ultrahigh strength graphite fiber to composite pressure vessels; (2) defining the fatigue performance of thin titanium lined, high strength graphite/epoxy pressure vessels; (3) selecting epoxy resin systems suitable for filament winding; (4) studying the fatigue life potential of Kevlar 49/epoxy pressure vessels; and (5) developing polymer liners for composite pressure vessels. The fiber performance and potential as a reinforcement for composites of the Thornel Special graphite fiber were evaluated by testing fiber/epoxy strands. Properties determined were fiber uniformity, strength and modulus at room and liquid nitrogen temperatures, stress strain behavior, effect of strain rate on fiber strength, and acoustic emission during tensile loading to failure. The Thornel Special graphite fiber was found to have a 357O-MPa failure stress, a 1.7% failure strain, a 2O6-GPa modulus, and a 1.77-Mg/m3 density at 230C. Low temperature and various strain rates appear to have no significant effect on fiber tensile properties.

Descriptors :   *FILAMENT WOUND CONSTRUCTION, *PRESSURE VESSELS, *GRAPHITE EPOXY COMPOSITES, STRESS STRAIN RELATIONS, TEMPERATURE, LOW TEMPERATURE, FATIGUE LIFE, POLYMERS, COMPOSITE MATERIALS, LOADS(FORCES), TENSILE PROPERTIES, FAILURE, CARBON FIBERS, STRAIN RATE, LININGS, STRENGTH(GENERAL), LIGHTWEIGHT, FATIGUE, THINNESS, TITANIUM, EPOXY COMPOUNDS, LIQUID NITROGEN, EPOXY RESINS, ACOUSTIC EMISSIONS, STRANDS.

Subject Categories : Laminates and Composite Materials
      Containers and Packaging

Distribution Statement : APPROVED FOR PUBLIC RELEASE