Measurement of cylindrical Rayleigh surface waves using line-focused PVDF transducers and defocusing measurement method

Chun I. Lin, Yung-Chun Lee

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Line-focused PVDF transducers and defocusing measurement method are applied in this work to determine the dispersion curve of the Rayleigh-like surface waves propagating along the circumferential direction of a solid cylinder. Conventional waveform processing method has been modified to cope with the non-linear relationship between phase angle of wave interference and defocusing distance induced by a cylindrically curved surface. A cross correlation method is proposed to accurately extract the cylindrical Rayleigh wave velocity from measured data. Experiments have been carried out on one stainless steel and one glass cylinders. The experimentally obtained dispersion curves are in very good agreement with their theoretical counterparts. Variation of cylindrical Rayleigh wave velocity due to the cylindrical curvature is quantitatively verified using this new method. Other potential applications of this measurement method for cylindrical samples will be addressed.

Original languageEnglish
Pages (from-to)1488-1494
Number of pages7
JournalUltrasonics
Volume54
Issue number6
DOIs
Publication statusPublished - 2014 Jan 1

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

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