Theoretical and Experimental Developments in Ultrasonic Evaluation of Periodic Surfaces

  • Alain Jungman
  • Laszlo Adler
  • R. Roberts
  • J. D. Achenbach
Part of the Library of Congress Cataloging in Publication Data book series (volume 2A)

Abstract

Most ultrasonic NDE experiments and their theoretical models deal with perfectly smooth interfaces, but true materials generally exhibit rough interfaces. As an approach to include the ultrasonic scattering which occurs on the different interfaces along the beam path, the reflection factors of acoustic waves diffracted by periodic surfaces is investigated theoretically and experimentally by looking at the frequency dependence of the reflected signal. Mode conversion bulk and surface waves are shown to be the result of strong coupling between the incident wave and the geometry of the grating. As a consequence, the geometrical parameters of the interface can be obtained to within 5%.

Keywords

Titanium Verse 

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References

  1. 1.
    A. Jungman, L. Adler and G. Quentin, “Ultrasonic anomalies in the spectrum of acoustic waves diffracted by periodic interfaces,” J. Appl. Phys., 53 (7), 1982.Google Scholar
  2. 2.
    J.T. Fokkema and P.M. van der Berg, “Elastodynamic diffraction by a periodic rough surface (stress-free boundary)” J. Acoust. Soc. Am., 62 (5), 1977.Google Scholar
  3. 3.
    R.A. Roberts, “Effect of sinusoidal crack-face perturbations on scattering of elastic waves,” Master of Science Thesis, 1981.Google Scholar

Copyright information

© Plenum Press, New York 1983

Authors and Affiliations

  • Alain Jungman
    • 1
    • 2
  • Laszlo Adler
    • 1
  • R. Roberts
    • 3
  • J. D. Achenbach
    • 3
  1. 1.Department of Welding EngineeringOhio State UniversityColumbusUSA
  2. 2.Groupe de Physique des Solides de 1’Ecole Normale SuperieureUniversity Paris VIIParis Cedex 05France
  3. 3.Department of Civil EngineeringNorthwestern UniversityEvanstonUSA

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