Modeling of piezoelectric-based Lamb wave generation and sensing for structural health monitoring

Ajay Raghavan; Carlos E. S. Cesnik

doi:10.1117/12.540269

29 July 2004 Modeling of piezoelectric-based Lamb wave generation and sensing for structural health monitoring

Ajay Raghavan, Carlos E. S. Cesnik

Proceedings Volume 5391, Smart Structures and Materials 2004: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems; (2004) https://doi.org/10.1117/12.540269
Event: Smart Structures and Materials, 2004, San Diego, CA, United States

Abstract

Among the various schemes being considered for Structural Health Monitoring (SHM), Lamb-wave testing has shown great promise. While Lamb-wave testing using hand-held transducers for Non Destructive Evaluation (NDE) is a well-established technology, Lamb-wave testing for SHM using surface-bonded/embedded piezos is a relatively new field. Little effort has been made towards a precise characterization of Lamb-wave excitation using piezos and often the various parameters involved are chosen without mathematical foundation. In this work, modeling of transient plane and circular-crested Lamb-wave generation and sensing using surface-bonded piezos in isotropic plates based on the 3-D linear elasticity equations is explored. Equations for the output voltage response of surface-bonded piezo-sensors in Lamb-wave fields are presented and optimization of the actuator/sensor geometry and materials is done based on those. Finally, numerical and experimental results to examine the validity of these models are discussed.

Citation Download Citation

Ajay Raghavan and Carlos E. S. Cesnik "Modeling of piezoelectric-based Lamb wave generation and sensing for structural health monitoring", Proc. SPIE 5391, Smart Structures and Materials 2004: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, (29 July 2004); https://doi.org/10.1117/12.540269

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