Advertisement

Journal of Nondestructive Evaluation

, Volume 11, Issue 2, pp 103–108 | Cite as

Self-calibrating ultrasonic technique for crack depth measurement

  • J. D. Achenbach
  • I. N. Komsky
  • Y. C. Lee
  • Y. C. Angel
Article

Abstract

A configuration of transducers together with a self-calibrating measurement technique is proposed to investigate the reflection and transmission of surface waves by a surface-breaking or near surface defect. By means of this technique, the ratio of the reflection and transmission coefficients (R/T and/orT/R) can be obtained in a reliable and accurate manner. The reflection and transmission of surface waves for oblique incidence on a surface breaking crack is investigated in detail. Information onT/R for the latter case can be used to determine the depth of the crack. The experimental measurements ofT/R show excellent agreement with theoretical results.

Key words

Ultrasonics surface breaking cracks self-calibrating crack depths 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    I. A. Viktorov,Rayleigh Waves and Lamb Waves — Physical Theory and Application (Plenum Press, New York, 1967).Google Scholar
  2. 2.
    J. D. Achenbach, A. K. Gautesen, and D. A. Mendelsohn, Ray Analysis of surface-waves interaction with an edge crack,IEEE Trans. of Son. Ultrason. SU27:124 (1980).Google Scholar
  3. 3.
    Y. C. Angel and J. D. Achenbach, Reflection and transmission of obliquely incident Rayleigh waves by a surface-breaking crack,J. Acoust. Soc. Am. 75:313 (1984).Google Scholar
  4. 4.
    B. H. Lidington and M. G. Silk, Crack depth measurements using a single surface wave probe,Brit. J. NDT 17:165 (1975).Google Scholar
  5. 5.
    B. Q. Vu and V. K. Kinra, Diffraction of Rayleigh waves in a half-space. I. Normal edge crack,J. Acoust. Soc. Am. 77(4):1425 (1985).Google Scholar
  6. 6.
    R. Dong, L. Adler, Measurements of reflection and transmission coefficients of Rayleigh waves from cracks,J Acoust. Soc. Am. 76(6):1761 (1984).Google Scholar
  7. 7.
    M. T. Resch, D. V. Nelson, H. H. Yuce, and G. F. Ramusat, A surface acoustic wave technique for monitoring the growth behavior of small surface fatigue cracks,J. Nondestr. Eval. 5(1):1 (1985).Google Scholar
  8. 8.
    B. R. Tittmann, F. Cohen-Tenoudji, M. de Billy, A. Jungman, and G. Quentin, A simple approach to estimate the size of small surface cracks with the use of acoustic surface waves,Appl. Phys. Lett. 33(1):6 (1978).Google Scholar
  9. 9.
    B. R. Tittmann, L. A. Ahlberg, and O. Buck, Crack closure effects in Ultrasonic NDE for real part-through fatigue cracks in Al-alloy, inReview of Progress in Quantitative NDE, Vol. 1 (Plenum Publishing Corp., New York, 1982), p. 551.Google Scholar
  10. 10.
    Z. L. Li, J. D. Achenbach, I. N. Komsky, and Y. C. Lee, Reflection and transmission of obliquely incident surface waves by an edge of a quarter space: Theory and experiment,J. Appl. Mech. 59:349 (1992).Google Scholar
  11. 11.
    F. J. Margetan, R. B. Thompson, and T. A. Gray, Interfacial spring model for ultrasonic interactions with imperfect interfaces: Theory of oblique incidence and application to diffusion bonded butt joints,J. Nondestr. Eval. 7:131 (1988).Google Scholar

Copyright information

© Plenum Publishing Corporation 1992

Authors and Affiliations

  • J. D. Achenbach
    • 1
  • I. N. Komsky
    • 1
  • Y. C. Lee
    • 1
  • Y. C. Angel
    • 2
  1. 1.Center for Quality Engineering and Failure PreventionNorthwestern UniversityEvanston
  2. 2.Department of Mechanical Engineering and Materials ScienceRice UniversityHouston

Personalised recommendations