Accession Number : ADA304528

Title :   Effects of Fiber/Matrix Interactions on the Properties of Graphite/Epoxy Composites.

Descriptive Note : Contractor rept. Sep 80-Dec 81,

Corporate Author : CELANESE RESEARCH CO SUMMIT NJ

Personal Author(s) : McMahon, Paul E. ; Ying, Lincoln

PDF Url : ADA304528

Report Date : SEP 1982

Pagination or Media Count : 167

Abstract : A state-of-the art literature review of the interactions between fibers and resin within graphite epoxy composite materials was performed. Emphasis centered on: adhesion theory;, wetting characteristics of carbon fiber; load transfer mechanisms; methods to evaluate and measure interfacial bond strengths; environmental influence at the interface; and the effect of the interface/interphase on composite performance, with particular attention to impact toughness. In conjunction with the literature review, efforts were made to design experiments to study the wetting behavior of carbon fibers with various finish variants and their effect on adhesion joint strength. The properties of composites with various fiber finishes were measured and compared to the baseline properties of a control. It was shown that by tailoring the interphase properties, a 30% increase in impact toughness was achieved without loss of mechanical properties at both room and elevated temperatures.

Descriptors :   *GRAPHITE EPOXY COMPOSITES, STRESS STRAIN RELATIONS, MATHEMATICAL MODELS, LOAD DISTRIBUTION, TENSILE STRENGTH, STRESS ANALYSIS, LITERATURE SURVEYS, STATE OF THE ART, INTERFACES, HIGH TEMPERATURE, SURFACE FINISHING, ADHESION, MODULUS OF ELASTICITY, CARBON FIBERS, MATRIX MATERIALS, FRACTURE(MECHANICS), ROOM TEMPERATURE, IMPACT STRENGTH, CHEMICAL BONDS, WETTING, FILAMENTS, MOISTURE, FAILURE(MECHANICS), EPOXY RESINS, VISCOSITY, ASPECT RATIO, ADHESIVE BONDING, SHEAR STRENGTH.

Subject Categories : Laminates and Composite Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE