Progress on Ultrasonic Flaw Sizing in Turbine Engine Rotor Components: Bore and Web Geometries

  • James H. Rose
  • T. A. Gray
  • R. B. Thompson
  • J. L. Opsal
Chapter
Part of the Library of Congress Cataloging in Publication Data book series (volume 2A)

Abstract

The application of generic flaw sizing techniques to specific components generally involves difficulties associated with geometrical complexity and simplifications arising from a knowledge of the expected flaw distribution. This paper is concerned with the case of ultrasonic flaw sizing in turbine engine rotor components. The sizing of flat penny shaped cracks in the web geometry will be discussed and new crack sizing algorithms based on the Born and Kirchhoff approximations will be introduced. Additionally we propose a simple method for finding the size of a flat, penny shaped crack given only the magnitude of the scattering amplitude. The bore geometry is discussed with primary emphasis on the cylindrical focussing of the incident beam. Important questions which are addressed include the effects of diffraction and the position of the flaw with respect to the focal line. The appropriate deconvolution procedures to account for these effects will be introduced. Generic features of the theory will be compared with experiment. Finally, the effects of focused transducers on the Born inversion algorithm are discussed.

Keywords

Reference Signal Rayleigh Wave Impulse Response Function Penny Shaped Crack Focal Line 
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.
This is a preview of subscription content, log in to check access.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    J.H. Rose and J.A. Krumhansl, J. Appl. Phys. 50, 2951 (1979).CrossRefGoogle Scholar
  2. 2.
    J. H. Rose and J. M. Richardson, J. Nondestructive Evaluation (in press).Google Scholar
  3. 3.
    V.G. Kogan and J.H. Rose, these proceedings.Google Scholar
  4. 4.
    D. K. Hsu, J. H. Rose, and D. O. Thompson, these proceedings.Google Scholar
  5. 5.
    D.K. Hsu, J.H. Rose, R.B. Thompson, and D.O. Thompson, submitted to Appl. Phys. Letts.Google Scholar
  6. 6.
    R.B. Thompson and T.A. Gray, these proceedings.Google Scholar
  7. 7.
    J.H. Rose, R.K. Elsley, B. Tittmann, V.V. Varadan and V.K. Varadan, in, Acoustic, Electromagnetic and Elastic Wave Scattering, Eds. V.V. Varadan and V.K. Varadan, pub. by Pergamon, p. 605 (1980).Google Scholar
  8. 8.
    J.H. Rose and J. A. Krumhansl, Cornell Materials Sciences Center Report #2846 (1978).Google Scholar
  9. 9.
    B. Budianski and J. R. Rice, J. Appl. Mech. 45, 453 (1978).CrossRefGoogle Scholar
  10. 10.
    J.D. Achenbach, K. Viswanathan and A.N. Norris, Wave Motion 1, 299 (1979).CrossRefMATHMathSciNetGoogle Scholar
  11. 11.
    A.N. Norris, these proceedings.Google Scholar
  12. 12.
    E.Domany, J.A. Krumhansl and S. Teitel, J. Appl. Phys. 49, 2599 (1978).Google Scholar
  13. 13.
    A.K. Mai, Int. J. Eng. Sci. 8, 381 (1970).CrossRefGoogle Scholar
  14. 14.
    R.K. Elsley, unpublished.Google Scholar
  15. 15.
    J.H. Rose, unpublished.Google Scholar
  16. 16.
    J.L. Opsal, these proceedings.Google Scholar
  17. 17.
    R.C. Addison and R.K. Elsley, Proc. DARPA/AFML Review of Quantitative NDE, p. 389 (1980).Google Scholar
  18. 18.
    R.B. Thompson and T. A. Gray, in, Review of Progress in Quantitative NDE, Eds. D.O. Thompson and D.E. Chimenti, Pub. by Plenum 1, 233 (1981).Google Scholar
  19. 19.
    V.G. Kogan, unpublished.Google Scholar

Copyright information

© Plenum Press, New York 1983

Authors and Affiliations

  • James H. Rose
    • 1
  • T. A. Gray
    • 1
  • R. B. Thompson
    • 1
  • J. L. Opsal
    • 2
  1. 1.Ames Laboratory, USDOEIowa State UniversityAmesUSA
  2. 2.Lawrence Livermore National LaboratoryLivermoreUSA

Personalised recommendations