Accession Number : AD0883248

Title :   Fatigue Behavior of Glass-Filament-Wound Epoxy Composites in Water.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s) : Romans, J. B. ; Sands, A. G. ; Cowling, J. E.

Report Date : 05 APR 1971

Pagination or Media Count : 26

Abstract : The significance of matrix compositions has been studied relation to the fatiguecharacteristics of glass-filament- ound reinforced plastics. Evidence indicatesthat water, as compared with air, severely limits the dynamic fatigue life of FRPepoxy. It is suggested that a relationship may exist between matrix degradationand the time-dependent response of the composite material to dynamic stresses.A new, very-water-resistant epoxy resin is shown to increase the reliability ofFRP by 200 to 300% in comparison with an equivalent state-of-the-art compositionexposed to the same type of stress and environmental conditions. (Author-PL)

Descriptors :   *FILAMENT WOUND CONSTRUCTION), (*REINFORCED PLASTICS, EPOXY RESINS, GLASS TEXTILES, UNDERWATER EQUIPMENT, LIQUID IMMERSION TESTS, REINFORCING MATERIALS, FATIGUE(MECHANICS), MECHANICAL PROPERTIES.

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE