Accession Number : ADA326379

Title :   Natural Exposure of Selected Graphite/Epoxy Composite Material Systems.

Descriptive Note : Final rept.,

Corporate Author : NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA AIRCRAFT AND CREW SYSTEMS TECHNOLO GY DIRECTORATE

Personal Author(s) : Trabocco, R. E.

PDF Url : ADA326379

Report Date : 31 JUL 1980

Pagination or Media Count : 78

Abstract : A study was made on selected graphite/epoxy composite materials exposed at different geographical locations. The Panama exposure site was more detrimental to reduced static strength than the Warminster, PA site. Coating was found to negate irreversible ultraviolet plus moisture degradation. Reversible elevated temperature moisture degradation was approximately 25% for matrix dominated properties. The T300/5208 system offered the best resistance to degradation from natural exposure. The use of a 6 ply O deg +/- 45 deg panel loaded in sustained flexure was found to enhance scatter.

Descriptors :   *DEGRADATION, *FLEXURAL PROPERTIES, *GEOGRAPHY, *GRAPHITE EPOXY COMPOSITES, MECHANICAL PROPERTIES, MOISTURE CONTENT, COATINGS, PENNSYLVANIA, PANAMA.

Subject Categories : Laminates and Composite Materials
      Mechanics
      Geography

Distribution Statement : APPROVED FOR PUBLIC RELEASE