Accession Number:

ADA151369

Title:

Development of a Field Repair Technique for 'Mini-Sandwich' Kevlar/Epoxy Aircraft Skin.

Descriptive Note:

Master's thesis,

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

• Cripps,D. B.

Report Date:

1984-06-01

Pagination or Media Count:

126.0

Abstract:

An experimental analysis was performed on Kevlarepoxy cloth mini-sandwich panels with cellular foam core. Three undamaged panels and twenty-three other panels with damage and repairs were subjected to static shear loading. Four parameters were varied in the types of repairs, hole size, hole plug filler material, patch material, and patch overlap distance. All twenty-six panels were tested to failure. A repair technique employing a cellular foam plug and fiber-glass patches overlapping the original hole by 0.50 inches, symmetrically applied with structural adhesive, was found to be suitable for repair of up to three inch diameter circular holes at field repair level. Additionally, postbuckling energy absorption was qualitatively examined for undamaged panels and for hole sizes ranging from 1 to 5 inches diameter. Originator-supplied keywords included Mini-Sandwich, Composite Material, Shear Loading, Repair, KevlarEpoxy, Aircraft panels, Theses.

Descriptors:

• *POLYAMIDE PLASTICS
• *REPAIR
• *EPOXY RESINS
• *SKIN(STRUCTURAL)
• *AIRCRAFT PANELS
• SHEAR PROPERTIES
• FIBERGLASS
• CELLS
• COMPOSITE MATERIALS
• STATIC LOADS
• ENERGY
• THESES
• BUCKLING
• ABSORPTION
• PLUGS
• ADHESIVES
• FOAM
• SANDWICH PANELS

Subject Categories:

• Aircraft
• Plastics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE