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The fundamental shear horizontal (SH0) wave in plate-like structures is ofgreat importance in non-destructive testing (NDT) and structural healthmonitoring (SHM) as it is non-dispersive, while excitation and reception of SH0waves using piezoelectrics is always a challenge. In this work, we firstlydemonstrate via finite element simulations that face-shear piezoelectrics issuperior to thickness-shear piezoelectrics in driving SH waves. Next, by usinga newly defined face-shear d24 PZT wafer as actuator and face-shear d36 PMN-PTwafers as sensors, pure SH0 wave was successfully excited in an aluminum platefrom 140 kHz to 190 kHz. Then, it was shown that the face-shear d24 PZT wafercould receive the SH0 wave only and filter the Lamb waves over a wide frequencyrange (120 kHz to 230 kHz). The directionality of the excited SH0 wave was alsoinvestigated using face-shear d24 PZT wafers as both actuators and sensors.Results show that pure SH0 wave can be excited symmetrically along twoorthogonal directions (0{\deg} and 90{\deg} ) and the amplitude of the excitedSH0 wave can keep over 90% of the maximum amplitude when the deviate angle iswithin 30{\deg}. This work could greatly promote the applications of SH wavesin NDT and SHM.

Excitation and reception of pure shear horizontal waves by using face-shear d24 mode piezoelectric wafers