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A practical omni-directional SH wave transducer for structural health monitoring based on two thickness-poled piezoelectric half-rings by Huan, Qiang; Chen, Mingtong; Li, Faxin is a scholarly article available to read on EtoBox.

What is A practical omni-directional SH wave transducer for structural health monitoring based on two thickness-poled piezoelectric half-rings about?

Structural health monitoring (SHM) has become more and more important in modern industries as it can monitor the safety of structures during the full service life and prevent possible losses of life and economics. Shear horizontal wave in plate-like structures is very useful for long distance defects inspection since its fundamental mode (SH0) is totally non-dispersive. However, all the currently available SH wave transducers are not suitable for practical SHM. In this work, we firstly investigated via finite element simulations the performances of thickness-poled d15 PZT ring based omni-directional SH wave piezoelectric transducers (OSH-PT) consisting of different number of elements. Results show that the two half-rings based OSH-PT can have perfect omni-directivity and acceptable performances in excitation/reception of SH0 waves, and its performances can be fairly enhanced by reducing the outer and inner diameters. Experimental results on a 2mm-thick, 21mm outer-diameter, 9mm inner-diameter two-half-ring OSH-PT shows that it has good omni-directional properties with the maximum deviation of ~14% in both excitation and reception of SH0 wave. The signal to noise ratio (SNR) of the

Author

Huan, Qiang; Chen, Mingtong; Li, Faxin

Published

2018

Language

EN