Accession Number : AD0846685

Title :   Graphite Fiber Reinforced Composites.

Descriptive Note : Technical rept. 1 Jun 67-31 May 68,

Corporate Author : MONSANTO RESEARCH CORP DAYTON OH DAYTON LAB

Personal Author(s) : Steingiser, Samuel ; Cass, Robert A.

Report Date : NOV 1968

Pagination or Media Count : 243

Abstract : The purpose of this project was to develop a process for inproving the interlaminar shear properties of graphite-resin composites. Various methods of treating graphite yarn and fiber surfaces to produce interactions with resin matrix materials were studied. Interlaminar shear properties of Thornel 40 graphite fiber reinforced composites have been improved at least twofold, and in some cases almost threefold, by a process wherein the fiber is heat-treated under defined conditions of time, temperature and atmosphere. The heat-treating operation on the fiber results in at least a 70-75% retention of the tensile strength of the fiber. (Author, modified-PL).

Descriptors :   (*AIRFRAMES, COMPOSITE MATERIALS), (*REINFORCING MATERIALS, GRAPHITE), FIBERS, PHYSICAL PROPERTIES, IMPREGNATION, PYROLYSIS, SURFACE PROPERTIES, SPINNING(INDUSTRIAL PROCESSES), EPOXY RESINS, FRACTOGRAPHY, SHEAR STRESSES, CRACK PROPAGATION, PHOTOMICROGRAPHY, MICROSTRUCTURE.

Subject Categories : Aircraft
      Laminates and Composite Materials
      Plastics
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE