Megahertz-range guided pure torsional wave transduction and experiments using a magnetostrictive transducer

• Published in: IEEE transactions on ultrasonics, ferroelectrics, and frequency control Vol. 57; no. 5; pp. 1225 - 1229
• Main Authors: Cho, Seung, Kim, Hoe, Kim, Yoon
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.05.2010; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Acoustical measurements and instrumentation; Acoustics; Coiling; Cracks; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Ferroelectric materials; Frequency control; Fundamental areas of phenomenology (including applications); Magnetostriction; Materials science; Materials testing; Meanders; Physics; Solid mechanics; Structural and continuum mechanics; Transducers; Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...); Waveguides; Short crack; Magnetostriction; Stress wave; Guided wave; Torsional vibration; Experimental study; High frequency; Magnetostrictive device; Non destructive test; Waveguide; Magnetoelastic effect
• ISSN: 0885-3010; 1525-8955
• DOI: 10.1109/TUFFC.2010/1535

This work is concerned with high-frequency guided torsional wave experiments in the range of 1 to 2 MHz in a cylindrical waveguide. A specially configured meander coil-magnetostrictive patch transducer was developed and successful experimental results of generation and measurement of guided pure torsional waves of up to 2 MHz were achieved. The usefulness of the developed method was demonstrated through a case study to detect a small-sized crack which would be otherwise difficult to identify with a lower-frequency torsional wave.