Counter-propagating Lamb-wave pair for nondestructive evaluation

Author

Suzuki, Manabu ; Hoshimiya, Tsutomu

Author_Institution

Graduate Sch. of Appl. Phys., Tohoku Gakuin Universitv, Miyagi, Japan

Volume

2

fYear

2004

fDate

23-27 Aug. 2004

Firstpage

1355

Abstract

A YAG laser beam was divided by a beam-splitter into two beams which were focused on a thin aluminum plate by two lenticular lenses to generate a pair of Lamb waves. Lamb waves were generated by grating-like thermoelastic line sources, the distance, d, of which was adjusted such that only limited Lamb modes could be generated. The generated counter-propagating Lamb wave pair (CLWP) was detected by both PZT and broadband air-coupled transducers. The application of the CLWP scheme to nondestructive evaluation (NDE) was investigated using several configurations.

Keywords

acoustic wave production; laser beam applications; nondestructive testing; piezoelectric transducers; surface acoustic wave devices; surface acoustic waves; thermoelasticity; Lamb wave generation; PZT transducer; YAG laser beams; beam-splitter; broadband air-coupled transducer; counter-propagating Lamb wave pair; grating-like thermoelastic line sources; lenticular lenses; nondestructive evaluation; piezoelectric transducer; thin aluminum plate; Acoustic beams; Aluminum; Laser beams; Laser modes; Lenses; Physics; Piezoelectric transducers; Signal processing; Thermoelasticity; Wavelet analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 2004 IEEE

ISSN

1051-0117

Print_ISBN

0-7803-8412-1

Type

conf

DOI

10.1109/ULTSYM.2004.1418046

Filename

1418046