In-Plane Stress Waves for NDE (Nondestructive Evaluation) of Graphite Fiber/Epoxy Composites

Abstract

Due to the complexity of the physical structure of composites, Non Destructive Testing (NDE) techniques which evaluate structural properties are required rather than the mere detection of inclusions, voids or discontinuities. This paper describes NDE techniques that have been used for evaluation of properties in wood, a natural composite, and the results of utilizing longitudinal stress waves for evaluation of graphite fiber/epoxy composites. The objectives of this study were: 1) to become familiar with graphite fiber/epoxy composites; and 2) to establish if the NDE stress wave method, for wood, is appropriate for evaluation of the properties of composites, such as, graphite fiber/epoxy. One of the conclusions of this study was that graphite fiber/epoxy composites respond to stress wave analysis similar to the natural composite, wood. Keywords: Nondestructive evaluation, Nondestructive testing, Composite materials, Wood, Process control, Quality assurance, Stress waves, Ultrasonic testing.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1988
Accession Number
ADA197718

Entities

People

  • Roy F. Pellerin

Organizations

  • Battelle Memorial Institute

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Composite Materials
  • Elastic Properties
  • Energy Storage
  • Engineering
  • Epoxy Composites
  • Fiber Reinforced Composites
  • Flexural Properties
  • Materials
  • Materials Science
  • Materials Testing
  • Mechanical Properties
  • Modulus Of Elasticity
  • Stress Waves
  • Stresses
  • Structural Properties
  • Tensile Strength

Fields of Study

  • Materials science

Readers

  • Reinforced Composite Materials
  • Systems Analysis and Design