Environmental Durability of Fiber Reinforced Composites

Abstract

An investigation has been completed which determines the physiochemical mechanisms of environmental durability and degradation of graphite-epoxy (Thornel T300 in 5208 epoxy) and fiber glass-epoxy S-2 glass in 5208 epoxy) under hydro-thermal (high moisture and temperature) exposure. Surface energy and moisture diffusion analysis provide nondestructive test methods which detect irreversible degradatiion of the fiber-matrix interface. Dynamic mechanical damping detects reversible volumetric plasticization effect on modulus, and the interlaminar shear strength and transfibrous fracture energy distributions. A composite durability characterization program is demonstrated which effectively combines preventative nondestructive evaluation (PNDE) with environmental failure and micromechanics analysis of composite structural reliability.

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Document Details

Document Type
Technical Report
Publication Date
Nov 30, 1978
Accession Number
ADA065086

Entities

People

  • D. H. Kaelble

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aging (Materials)
  • Composite Materials
  • Epoxy Composites
  • Fiber Reinforced Composites
  • Graphitic Materials
  • Hydrothermal Aging
  • Laminates
  • Material Degradation Processes
  • Materials
  • Materials Science
  • Materials Testing
  • Micromechanics
  • Shear Strength
  • Statistical Analysis
  • Surface Energy
  • Test And Evaluation
  • Test Methods

Fields of Study

  • Materials science

Readers

  • Aerospace Test and Evaluation
  • Reinforced Composite Materials