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:

1971-04-05

Pagination or Media Count:

26.0

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