Comparison between flat multi-element array device and oblique incidence transducers for Lamb waves generation: application for embedment in composite material

T. Demol; P. Blanquet; Christophe Delebarre; Henri Kaczmarek

doi:10.1117/12.237102

26 April 1996 Comparison between flat multi-element array device and oblique incidence transducers for Lamb waves generation: application for embedment in composite material

T. Demol, P. Blanquet, Christophe Delebarre, Henri Kaczmarek

Author Affiliations +

Proceedings Volume 2779, 3rd International Conference on Intelligent Materials and 3rd European Conference on Smart Structures and Materials; (1996) https://doi.org/10.1117/12.237102
Event: 3rd International Conference on Intelligent Materials, 1996, Lyon, France

Abstract

Lamb waves are used in the non destructive evaluation 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 (oblic incidence transducer), 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 waves generation is compared with classical oblic incidence sensors.

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T. Demol, P. Blanquet, Christophe Delebarre, and Henri Kaczmarek "Comparison between flat multi-element array device and oblique incidence transducers for Lamb waves generation: application for embedment in composite material", Proc. SPIE 2779, 3rd International Conference on Intelligent Materials and 3rd European Conference on Smart Structures and Materials, (26 April 1996); https://doi.org/10.1117/12.237102

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