Accession Number : ADA305383

Title :   Fatigue Behavior of Graphite/Glass/Epoxy Composites.

Descriptive Note : Final rept. 9 Feb 72-9 Feb 73,

Corporate Author : IIT RESEARCH INST CHICAGO IL

Personal Author(s) : Rao, Nagaraja ; Hofer, K. E., Jr

PDF Url : ADA305383

Report Date : APR 1973

Pagination or Media Count : 143

Abstract : The advanced composite materials possess characteristics of stiffness and strength which are most desirable for advanced naval aircraft. Glass composite materials, on the other hand, possess the equally desirable characteristic of low cost. The appropriate combination of these many features can be obtained by a suitable blending of the two or more composite materials. Technically, the blending of two or more fiber types in a laminate, can be achieved by (1) mixing the fibers in the tow or roving, (2) intra-ply mixing of glass rovings with graphite tows or, (3) interleaving or interply mixing of two separate fibrous prepreg systems or any combination of the above. There are additional economic advantages to the third approach where prepreg tapes with a common resin system are prepared for two separate fibers: glass and graphite. For this reason the third approach was selected for some further study particularly with regard to the fatigue performance and its relative behavior to prior studies of the separate composites. The specific objective of the program was to utilize a commercially available glass and a commercially available high strength and high modulus graphite with a common epoxy matrix to maximize the technical performance of the hybrid composite in fatigue applications. (KAR) p. 11

Descriptors :   *GLASS, *FATIGUE(MECHANICS), *GRAPHITE EPOXY COMPOSITES, FIBERS, LOW COSTS, POLYMERS, STIFFNESS, RATES, MATRIX MATERIALS, NAVAL AIRCRAFT, HIGH STRENGTH, HYBRID SYSTEMS, BEHAVIOR.

Subject Categories : Laminates and Composite Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE