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NMR as a Probe of Absorbed Water in Graphite-Reinforced Plastic

  • Eun-Kee Jeong
  • Mark S. Conradi
  • Kent Cueman
  • Lewis J. ThomasIII
Chapter
Part of the Review of Progress in Quantitative Nondestructive Evaluation book series

Abstract

Graphite-reinforced plastic (GRP) is being used increasingly in aircraft applications. This lightweight material, however, is difficult to inspect for impact damage. Generally, the damaged region occurs on the back side of the GRP, where it is least accessible. It has been noted that the damaged regions absorb more water from a humid atmosphere than the undamaged regions. We propose that nuclear magnetic resonance (NMR) detection of the absorbed water may be a feasible method of detecting and locating impact damage in GRP structures.

Keywords

Nuclear Magnetic Resonance Skin Depth Free Induction Decay Nuclear Magnetic Resonance Signal Spin Signal 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    J. D. Ellett, Jr., et al. in Advances in Magnetic Resonance, Volume 5, edited by J. S. Waugh ( Academic, New York, 1971 ).Google Scholar
  2. 2.
    G. H. Woodward (editor), the Radio Amateur’s Handbook, (American Radio Relay League, Newington, CT., 1983).Google Scholar
  3. 3.
    E. Fukushima and S. B. W. Roeder, Experimental Pulse NMR: A Nuts and Bolts Approach (Addison-Wesley, Reading, MA, 1981).Google Scholar
  4. 4.
    J. R. Reitz and F. J. Milford, Foundations of Electromagnetic Theory (Addison-Wesley, Reading, MA, 1967).Google Scholar

Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • Eun-Kee Jeong
    • 1
  • Mark S. Conradi
    • 1
  • Kent Cueman
    • 2
  • Lewis J. ThomasIII
    • 2
  1. 1.Department of PhysicsWashington UniversitySt. LouisUSA
  2. 2.General Electric CompanySchenectadyUSA

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