Accession Number:

ADA034787

Title:

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

Descriptive Note:

Technical rept. 1 Jul 1974-1 Jan 1976

Corporate Author:

NAVAL SURFACE WEAPONS CENTER WHITE OAK LAB SILVER SPRING MD

Personal Author(s):

Report Date:

1976-09-27

Pagination or Media Count:

77.0

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.

Subject Categories:

  • Laminates and Composite Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE