Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Directivity Analysis for Optimal Design of Ultrasonic Angle Beam Transducer

초음파 사각 트랜스듀서의 최적설계를 위한 지향성 해석

  • Published : 2008.09.01
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Abstract

Ultrasonic testing uses the directivity of the ultrasonic wave, which propagates in on direction. The directivity is expressed as the relationship between the propagate direction and its sound pressure. The directivity of an ultrasonic wave is related to the choice of probe arrangement, testing sensitivity and scanning pitch and correct measurement of defect size and location. This paper describes on the directivity measurement of ultrasonic wave using the visualization method. The directivity of shear wave emitted from the angle beam transducer were constant during propagation. The difference of directivity was existed between 2 MHz and 4 MHz angle beam transducers. When these experimental results were compared with the theory which was based on the continuous wave, it showed good agreement with theoretical directivity on the principal lobe.

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References

  1. J and H KrautKramer, 1990, "Ultrasonic Testing of materials" Springer-Verlag, pp. 160-221
  2. Albert S. Birks, 1991, "Ultrasonic Testing," American Society for Nondestructive Testing, pp. 267-309
  3. Hall, K. G., 1977, "A Qualitative Evaluation of Variable-angle Ultrasonic Transducers by the Photoelastic Visualization Method," Ultrasonics, Vol. 15, pp. 245-252 https://doi.org/10.1016/0041-624X(77)90035-X
  4. Light, G. M., A. Singh and T. Rudwick, 1982, "Ultrasonic Transducer Characterization using the Combined Schlieren, Photoelastic, and Raman Nath System," Materials Evaluation, Vol. 40, pp. 783-790
  5. Erhard, A., Fuchs, H., Mohrle, W. and Matscholl, P., 1985, "Characterization of Sound Field Parameters of Ultrasonic Probes using a Computer Acquisition System," NDT ＆ E International, Vol. 18, pp. 359-362 https://doi.org/10.1016/0308-9126(85)90167-1
  6. Nam, Y. H., 1999, "Directivity Analysis of Ultrasonic Waves on Surface Defects using a Visualization Method," KSME International Journal, Vol. 13, pp. 158-167 https://doi.org/10.1007/BF02943667
  7. Nam, Y. H., 2001, "Modeling of Ultrasonic Testing in Butt Joint by Ray Tracing," KSME International Journal, Vol. 15, pp. 441-447
  8. 日本學術振興會編, 1974, “超音波探傷の理論と基礎 に關する硏究報告書(その I)," pp. 95-130
  9. 日本學術振興會編, 1978, “超音波探傷器用探觸子の 音場に關する硏究報告書(そのII)," pp. 1-51
  10. Ammirato, F. V., 1977, "A Calculational Model for Shear Wave Echo from Subsurface Planar Flaws," Material Evaluation, Vol. 35, pp. 46-50