| Title |
Numerical investigation of air-coupled generation of Lamb waves using rectangular phased arrays |
| Authors |
Vilpišauskas, A ; Kažys, R |
| Full Text |
|
| Is Part of |
Vibroengineering procedia: International conference "Vibroengineering - 2013", September 17-19, 2013, Druskininkai, Lithuania.. Kaunas : Vibroengineering. 2013, vol. 1, p. 97-102.. ISSN 2345-0533. eISSN 2538-8479 |
| Keywords [eng] |
nondestructive examination ; surface waves ; transducers ; ultrasonic waves ; air-coupled Lamb waves ; air-coupled ultrasonic transducer |
| Abstract [eng] |
In the case of non-destructive testing and evaluation (NDT & NDE) of plate 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 120-160dB typically, so optimum vibration excitation in tested material is needed. A numerical investigation has been performed in order to evaluate air-coupled Lamb wave excitation in an isotropic single layer plastic film using square transducer. A new method of excitation using planar phased arrays with rectangular elements has been proposed. |
| Published |
Kaunas : Vibroengineering |
| Type |
Conference paper |
| Language |
English |
| Publication date |
2013 |
| CC license |
|
