The Effects of Thick Interfaces on the Mechanical Performance of Fiber Reinforced Composites

Abstract

Techniques are described which permit the application of very uniform thin epoxy coatings on boron or 5 mil diameter glass fiber. These thick interfaces improve the transverse strength and interlaminar shear strength of glass/epoxy composites by as much as 60% and 35% improvements are typical for boron/epoxy composites. Flexural and torsional fatigue strengths of both materials are improved by 1 to 3 orders of magnitude. The resistance of composites to boiling water is also dramatically improved. After a 2 hour boil, thick interface samples retain more than 80% of their original transverse strength while control samples retain only 65 to 75%.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1974
Accession Number
AD0776592

Entities

People

  • J. D. Fairing
  • M. J. Michno
  • R. E. Lavengood

Organizations

  • Monsanto

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Composite Materials
  • Electron Microscopes
  • Electron Microscopy
  • Epoxy Composites
  • Failure Mode And Effect Analysis
  • Fatigue Life
  • Fiber Reinforced Composites
  • Glass Fibers
  • Materials
  • Mechanical Working
  • Microscopes
  • Scanning Electron Microscopes
  • Shear Strength
  • Shear Stresses
  • Stress Concentration
  • Stress Strain Relations
  • Stresses

Fields of Study

  • Materials science

Readers

  • Reinforced Composite Materials