Investigation of Structure of Graphite Fibers with the Goal of Improving Their Mechanical Properties

Abstract

The objective of the study was to develop data upon which a program could be based to improve the strength of graphite fibers. It was found that graphite fibers are composed of ribbons or sheets and contain many voids and flaws. The ribbons twist and undulate offering many opportunities for them to bend, fold over and cut each other. This condition explains their relatively poor tensile, compressive, shear and impact strengths. Similar conditions exist in 'dry' areas in glass fiber reinforced composites and laminates. They are corrected by injection of resin into the area followed by hardening of the resin. Such an approach if used successfully with graphite fibers should strengthen them immeasurably. Exfoliated graphite has not been investigated as a source for high strength and modulus materials.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1974
Accession Number
ADA013524

Entities

People

  • Solomon Goldfein

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Carbon Fibers
  • Composite Materials
  • Electron Microscopy
  • Engineering
  • Fiber Reinforced Composites
  • Fiber Reinforced Polymers
  • Fibers
  • Graphitic Materials
  • Materials
  • Materials Engineering
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Mechanical Properties
  • Particulate Matter
  • Reinforced Plastics
  • Tensile Strength

Readers

  • Nanocomposite Materials Science
  • Optical Fiber Sensing and Electromagnetic Propagation.
  • Structural Health Monitoring of Composite Structures.