Lamb waves generation using a flat multi-element array device

Author

Demol, T. ; Blanquet, P. ; Delebarre, C.

Author_Institution

CNRS, Valencienne Univ., France

Volume

1

fYear

1995

fDate

7-10 Nov 1995

Firstpage

791

Abstract

Lamb waves are used in the nondestructive evaluation (NDE) of composite materials as they can propagate over long distances. The usual method of generation relying on a transducer that can not be reduced to a low thickness, the development of a thin transducer using a comb-like array of piezoelectric elements has been investigated. It requires a deep understanding of the dispersion relations in the material, in order to determine its geometrical parameters for a set of frequencies. Then, a prototype designed to work on surface is presented and Lamb wave generation using “in-phase” and “varying phase” methods is discussed

Keywords

composite materials; piezoelectric transducers; surface acoustic waves; ultrasonic dispersion; ultrasonic materials testing; ultrasonic transducer arrays; Lamb waves generation; comb-like array; composite materials; dispersion relations; flat multi-element array device; geometrical parameters; in-phase methods; nondestructive evaluation; piezoelectric elements; thin transducer; varying phase methods; Dispersion; Equations; Frequency; Inspection; Laminates; Piezoelectric materials; Piezoelectric transducers; Prototypes; Surface waves; Ultrasonic transducer arrays;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1995. Proceedings., 1995 IEEE

Conference_Location

Seattle, WA

ISSN

1051-0117

Print_ISBN

0-7803-2940-6

Type

conf

DOI

10.1109/ULTSYM.1995.495685

Filename

495685