30 March 2011 Design of mode selective actuators for Lamb wave excitation in composite plates
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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, Daniel Schmidt, Christoph Heinze, Christoph Heinze, Wolfgang Hillger, Wolfgang Hillger, Artur Szewieczek, Artur Szewieczek, Michael Sinapius, Michael Sinapius, Peter Wierach, 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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