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Mode switchable guided elastic wave transducer based on piezoelectric fibre patches

 
: Kim, Yongtak; Tschöke, Kilian; Schubert, Lars; Köhler, Birgit

:

Gelman, Len (Ed.):
Advances in Condition Monitoring and Structural Health Monitoring : WCCM 2019; selected contributions from the 2nd World Congress on Condition Monitoring (WCCM 2019), held in Singapore in December 2019
Singapore: Springer Nature Singapore, 2021 (Lecture Notes in Mechanical Engineering)
ISBN: 978-981-15-9198-3 (Print)
ISBN: 978-981-15-9199-0 (Online)
S.723-730
World Congress on Condition Monitoring (WCCM) <2, 2019, Singapore>
European Commission EC
H2020; 722134; NDTonAIR
Training Network in Non-Destructive Testing and Structural Health Monitoring of Aircraft structures
Englisch
Konferenzbeitrag
Fraunhofer IKTS ()
shear horizontal guided waves; structural health monitoring; SHPFP; piezoelectric fibre patch; directivity; patterned excitation

Abstract
An improved transducer for shear horizontal guided waves is presented. Two ideas are combined: (1) the generation of pure shear tractions by stapling two piezoelectric fiber patches and (2) matching the excitation pattern with the spatial-time behaviour of the intended wave. The spatial pattern is determined by the structure of the interdigital electrodes. One possible realization of the electrode layout is selected, and the performance of this type of transducers is demonstrated by FEM modelling of the generated wave field. The results are discussed and scheduled further work which is indicated.

: http://publica.fraunhofer.de/dokumente/N-633799.html