Non-Fickian Moisture Diffusion in Polymeric Composites

Abstract

This article concerns the effects of non-Fickian water diffusion in fiber-reinforced polymeric composites. The departure from classical diffusion is attributed to the time-dependent response of the polymer, akin to viscoelastic mechanical response. A formulation is provided to evaluate the coefficient of moisture diffusion and moisture profiles within the composite for the non- Fickian case. In addition, it is demonstrated that computed magnitudes of residual hygro-thermal stresses may differ by about 25% from predictions based upon classical diffusion.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1992
Accession Number
ADA257919

Entities

People

  • L. W. Cai
  • Y. Weitsman

Organizations

  • University of Tennessee

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Body Weight
  • Coefficients
  • Composite Materials
  • Computations
  • Diffusion
  • Engineering
  • Equations
  • Laminates
  • Materials
  • Mechanics
  • Military Research
  • Moisture
  • Residual Stress
  • Residuals
  • Stresses
  • Thermal Stresses

Readers

  • Fluid Dynamics.
  • Reinforced Composite Materials
  • Structural Dynamics.