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Relative Reluctances in Thick Aluminum Samples

  • William F. Schmidt
  • Otto H. Zinke
Chapter

Abstract

The effects of sample thicknesses, frequencies, and values of lift-off on real and imaginary reluctances for a modified ac magnetic bridge were found for aluminum. Aluminum test samples with thicknesses varying between 0.406 and 6.35 millimeters were scanned at values of lift-off ranging from 0.1 to 0.38 millimeters and at frequencies between 200 and 5000 Hz.

Keywords

Sample Thickness Continuous Curve Skin Depth Corrosion Loss Imaginary Impedance 
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.
    O.H. Zinke and W.F. Schmidt, “Linear ac Magnetic Circuit Theory,” IEEE Transactions on Magnetics, Vol. 29, pp. 2207–2212, 1993.CrossRefGoogle Scholar
  2. 2.
    O.H. Zinke, U.S. Patent No. 4,901,017, 13 February 1990.Google Scholar
  3. 3.
    W.F. Schmidt and O.H. Zinke, “Application of the Quasitatic Model to the Modified Bridge,” to be published in Review of Progress in Quantitative Nondestructive Evaluation, edited by D.O. Thompson and D.E. Cimenti, Vol. 13, 1994.Google Scholar
  4. 4.
    W.F. Schmidt and O.H. Zinke, and S. Nasrazadani, “Characterization of a Crack in an Aluminum Bar Using an ac Magnetic Bridge,” accepted for an STP publication by ASTM to appear in 1994.Google Scholar
  5. 5.
    O.H. Zinke and W.F. Schmidt, “Modified ac Magnetic Bridge Scanning patterns of Samples Simulating Flaws in Aircraft Seams,” Review of Progress in Quantitative Nondestructive Evaluation, Vol. 12, 2011–2019, Edited by D.O. Thompson and D.E. Cimenti, Plenum Press, New York, 1993.CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1995

Authors and Affiliations

  • William F. Schmidt
    • 1
  • Otto H. Zinke
    • 2
  1. 1.Department of Mechanical EngineeringUniversity of ArkansasFayettevilleUSA
  2. 2.University of ArkansasFayettevilleUSA

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