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Ultrasonic Flexural Torsional Guided Wave Focusing in Pipe

[+] Author Affiliations
Zongqi Sun, Joseph L. Rose

Pennsylvania State University, University Park, PA

Paper No. PVP2004-2814, pp. 53-57; 5 pages
doi:10.1115/PVP2004-2814
From:
  • ASME/JSME 2004 Pressure Vessels and Piping Conference
  • Recent Advances in Nondestructive Evaluation Techniques for Material Science and Industries
  • San Diego, California, USA, July 25–29, 2004
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4679-2
  • Copyright © 2004 by ASME

abstract

Ultrasonic flexural torsional guided wave properties, including the excitation and propagation have been studied recently. Natural focusing is one of the major characteristics exhibited by partial loading excitation. With the aid of phased array transducer we propose a wave focusing method to enhance the signal to noise ratio and defect resolution in pipe inspection. With time delays and amplitudes applied to different elements constructive wave interference at specific point can be achieved in order to focus wave energy. Focusing effect is examined by angular profile, which is the circumferential displacement distribution.

Copyright © 2004 by ASME
Topics: Waves , Pipes

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