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Eddy Current Inspection of Graphite-Epoxy Solid Rocket Motor Canisters

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Review of Progress in Quantitative Nondestructive Evaluation

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Abstract

Filament wound graphite/epoxy cylinders are used in a number of applications because of their favorable strength-to-weight ratio. Eddy current techniques are receiving more attention for composite inspection because eddy currents detect broken fibers but not delaminations. Therefore, eddy current inspection of this material would be desirable in its own right and as an adjunct to ultrasonic inspection which detects delaminations, but not broken fibers. However, filament wound graphite/epoxy is difficult to inspect because of its large and anisotropie electrical resistivity. This paper presents a technique for eddy current NDI of filament wound graphite/epoxy which uses currents flowing in the low-resistivity circumferential direction. This method eliminates several objections to conventional eddy current inspection of this material.

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References

  1. Vernon, S., “Eddy Current Nondestructive Inspection of Graphite/Epoxy Using Ferrite Cup Core Probes,” NSWC TR 87–148, Naval Surface Warfare Center, White Oak, MD 20903–5000

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  2. Churchill, R. J., Lane, S. S., Moore, R. H. and Groger, H. P., “Characterization of Damage in Composite Rocket Motor Canisters,” Final Report, U. S. Navy, Naval Weapons Center, China Lake, California, Contract No. N65030–87-C-0177, June 1989.

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Author information

Authors and Affiliations

  1. American Research Corporation of Virginia, Radford, VA, 24143-3406, USA

    Stephen S. Lane, R. J. Churchill & H. P. Groger

Authors
  1. Stephen S. Lane
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  2. R. J. Churchill
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  3. H. P. Groger
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Editor information

Editors and Affiliations

  1. Center for NDE Ames Laboratory (USDOE) and Department of Engineering Science and Mechanics, Iowa State University, 50011, Ames, Iowa, USA

    Donald O. Thompson

  2. Center for NDE and Department of Materials Science and Engineering, The Johns Hopkins University, 21218, Baltimore, Maryland, USA

    Dale E. Chimenti

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© 1990 Springer Science+Business Media New York

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Lane, S.S., Churchill, R.J., Groger, H.P. (1990). Eddy Current Inspection of Graphite-Epoxy Solid Rocket Motor Canisters. In: Thompson, D.O., Chimenti, D.E. (eds) Review of Progress in Quantitative Nondestructive Evaluation. Review of Progress in Quantitative Nondestructive Evaluation. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-5772-8_125

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  • DOI: https://doi.org/10.1007/978-1-4684-5772-8_125

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4684-5774-2

  • Online ISBN: 978-1-4684-5772-8

  • eBook Packages: Springer Book Archive

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