Composite Impact Strength Improvement through a Fiber/Matrix Interphase.

Abstract

The objective of the program was to improve the impact strength and toughness of fiber/resin composites by means of a fiber coating interphase. Graphite fiber/epoxy resin composites were fabricated with four different fiber coating systems introduced in a matrix-fiber interphase. Two graphite fibers, a high strength and a high modulus type, were studied with the following coating systems: chemical vapor deposited boron, electroless nickel, a polyamide-imide resin and a thermoplastic polysulfone resin. Evaluation methods included the following tests: Izod, flexure, shear fracture toughness, longitudinal and transverse tensile, and transverse and longitudinal compression. No desirable changes could be effected with the high strength fiber, but significant improvements in impact performance were observed with the polyamide-imide resin coated high modulus fiber with no loss in composite modulus. (AN)

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1975
Accession Number
ADA305565

Entities

People

  • P. J. Cavano
  • W. E. Winters

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Composite Material Fabrication
  • Composite Materials
  • Fabrication
  • Failure Mode And Effect Analysis
  • Fiber Reinforced Composites
  • Graphitic Materials
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Resins
  • Tensile Stress
  • Test Methods

Fields of Study

  • Materials science

Readers

  • Reinforced Composite Materials