Study of Graphite/Epoxy Composites for Material Flaw Criticality.

Abstract

Usefulness of NDE methodology for assessing criticality of disbonds with two-dimensional planforms located in laminated graphite/epoxy composites has been examined. Linear elastic fracture mechanics approach, semi-empirical growth laws and methods of stress analysis based on a modified laminated plate theory have been studied for assessing growth rates of disbonds in a transverse shear environment. Elastic stability analysis has been utilized for laminates with disbonds subjected to in-plane compression and/or shear. Results of nondestructive inspections and destructive tests have been correlated with analytical predictions. In addition, effects of moisture conditioning and cyclic loading on wave velocities and attenuation of sound in graphite epoxy composites and in neat resin samples have been studied. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1980
Accession Number
ADA101492

Entities

People

  • R. B. Pipes
  • S. N. Chatterjee

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Composite Materials
  • Elastic Properties
  • Epoxy Composites
  • Fracture (Mechanics)
  • Geometry
  • Integral Equations
  • Laminates
  • Materials
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Mechanics
  • Signal Processing
  • Test And Evaluation
  • Three Dimensional
  • Two Dimensional
  • Wave Propagation

Fields of Study

  • Materials science

Readers

  • Reinforced Composite Materials
  • Structural Health Monitoring of Composite Structures.