Numerical Investigation of Air-Coupled Generation of Lamb Waves in Isotropic Plates

Authors

  • A. Vilpisauskas Kaunas University of Technology
  • R. Kazys Kaunas University of Technology

DOI:

https://doi.org/10.5755/j01.eee.20.1.6162

Keywords:

Air-coupled ultrasonic, isotropic single layer plate, Lamb waves, numerical simulation

Abstract

In the case of non-destructive testing and evaluation (NDT & NDE) of plate materials and structures ultrasonic Lamb waves are used. Very often air-coupled ultrasonic transducers are used for non-contact Lamb wave excitation and reception. This method has a very serious drawback: global insertion losses for an air-coupled system may be 120 dB–160 dB typically. In order to improve this NDT method a better understanding of Lamb wave excitation process is needed. A numerical investigation was performed in order to evaluate air-coupled Lamb wave excitation in an isotropic single layer plate. It is shown how Lamb wave normal displacement amplitude depends on an incidence angle and the distance between the plate and the transducer.

DOI: http://dx.doi.org/10.5755/j01.eee.20.1.6162

Downloads

Published

2014-01-09

How to Cite

Vilpisauskas, A., & Kazys, R. (2014). Numerical Investigation of Air-Coupled Generation of Lamb Waves in Isotropic Plates. Elektronika Ir Elektrotechnika, 20(1), 33-36. https://doi.org/10.5755/j01.eee.20.1.6162

Issue

Vol. 20 No. 1 (2014)

Section

ELECTRONIC MEASUREMENTS

License

The copyright for the paper in this journal is retained by the author(s) with the first publication right granted to the journal. The authors agree to the Creative Commons Attribution 4.0 (CC BY 4.0) agreement under which the paper in the Journal is licensed.

By virtue of their appearance in this open access journal, papers are free to use with proper attribution in educational and other non-commercial settings with an acknowledgement of the initial publication in the journal.