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Structural Health Monitoring with Piezoelectric Wafer Active Sensors, 2nd Edition by Victor Giurgiutiu

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Chapter 11

Wave Tuning with Piezoelectric Wafer Active Sensors

This chapter deals with a basic aspect of the interaction between PWAS and structure during the active SHM process, i.e., the tuning between the PWAS and the Lamb waves traveling in the structure. Under electric excitation, the PWAS undergo oscillatory contractions and expansions, which are transferred to the structure through the bonding layer to excite Lamb waves into the structure. In this process, several factors influence the behavior of the excited waves: PWAS length, excitation frequency, wavelength of the guided wave, etc. The interaction of PWAS with the ultrasonic waves generated into the structure is modeled analytically and a solution is developed using space-domain ...

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