30 March 2011 Design of mode selective actuators for Lamb wave excitation in composite plates
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Abstract
Structural Health Monitoring (SHM) based on Lamb waves, a type of ultrasonic guided waves, is a promising method for in-service inspection of composite structures. In this study mode selective actuators are developed to excite a particular Lamb wave mode in composite plates. Different manufacturing technologies based on monolithic piezoceramics with applied interdigitated electrodes and piezocomposites are described. A mode selective actuator is designed and optimized. Finite element modeling and experimental tests on quasi-isotropic composite plates are performed in order to characterize the mode selectivity of the actuators.
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Daniel Schmidt, Christoph Heinze, Wolfgang Hillger, Artur Szewieczek, Michael Sinapius, Peter Wierach, "Design of mode selective actuators for Lamb wave excitation in composite plates", Proc. SPIE 7984, Health Monitoring of Structural and Biological Systems 2011, 798409 (30 March 2011); doi: 10.1117/12.880034; https://doi.org/10.1117/12.880034
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