The Effect of Moisture on Carbon Fiber Reinforced Epoxy Composites. 1. Diffusion

Abstract

Mathematical models are suggested for calculating the reduced moisture diffusivities in unidirectional carbon fiber reinforced composites with hexagonal and tetragonal fiber alignment, parallel and perpendicular to the fiber direction, as a function of fiber volume fraction. The effective diffusion coefficients measured perpendicular to the fiber direction of 6 carbon fiber composites were determined as a function of temperature and relative humidity. The knowledge of the diffusion coefficients as a function of temperature, relative humidity, fiber volume fraction and composite geometry allow the prediction of the internal moisture distribution in a composite if the environment can be specified. A few simple examples have been illustrated.

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Document Details

Document Type
Technical Report
Publication Date
Sep 27, 1976
Accession Number
ADA034787

Entities

People

  • Alan E. Berger
  • Joseph M. Augl

Organizations

  • Naval Ordnance Laboratory

Tags

Communities of Interest

  • Air Platforms
  • C4I
  • Ground and Sea Platforms
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Carbon Fibers
  • Commercial Aircraft
  • Composite Materials
  • Computational Science
  • Differential Equations
  • Diffusion Coefficient
  • Epoxy Composites
  • Fiber Reinforced Composites
  • Geometry
  • Materials
  • Materials Laboratories
  • Materials Science
  • Mechanical Properties
  • Mechanics
  • Plastic Explosives
  • Two Dimensional

Fields of Study

  • Materials science

Readers

  • Approximation Theory.
  • Materials Science and Engineering.
  • Reinforced Composite Materials