Accession Number:

ADA279071

Title:

Improved Process for Fabrication of Composite Flextensional Shells

Descriptive Note:

Final rept.

Corporate Author:

DU PONT DE NEMOURS (E I) AND CO NEWARK DE ADVANCED COMPOSITES DIV

Personal Author(s):

• Deckers, Mark E.
• Dainton, Robert L.
• Adkinson, W. R.

Report Date:

1988-10-25

Pagination or Media Count:

16.0

Abstract:

Manufacturing of thick walled composite flextensional shells by filament winding has proven to be the most economical manner to make them. However, problems arose with the shells delaminating during production or application of external loads. It has been identified that a major source of the delamination problem is insufficient interlaminar shear strength in the glas epoxy laminate. Improvements in the order of 30 were achieved, as measured by apparent short beam shear. This was consistently accomplished by minimizing entrained air, controlling winding tensions which produced the correct fiber volume, and using resin additives which assisted the bonding of the epoxy resin to the glass fiber.

Descriptors:

• *FILAMENT WOUND CONSTRUCTION
• *LAMINATES
• *SHELLS(STRUCTURAL FORMS)
• *EPOXY COMPOSITES
• FABRICATION
• EPOXY RESINS
• TORSION
• THICK WALLS
• SHEAR STRENGTH
• DELAMINATION
• COMPOSITE STRUCTURES
• GLASS FIBERS
• FLEXURAL STRENGTH
• BONDING

Subject Categories:

• Laminates and Composite Materials
• Structural Engineering and Building Technology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE