19 April 2017 Numerical and experimental simulation of linear shear piezoelectric phased arrays for structural health monitoring
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Abstract
A novel d36-type piezoelectric wafer fabricated from lead magnesium niobate-lead titanate (PMN-PT) is explored for the generation of in-plane horizontal shear waves in plate structures. The study focuses on the development of a linear phased array (PA) of PMN-PT wafers to improve the damage detection capabilities of a structural health monitoring (SHM) system. An attractive property of in-plane horizontal shear waves is that they are nondispersive yet sensitive to damage. This study characterizes the directionality of body waves (Lamb and horizontal shear) created by a single PMN-PT wafer bonded to the surface of a metallic plate structure. Second, a linear PA is designed from PMN-PT wafers to steer and focus Lamb and horizontal shear waves in a plate structure. Numerical studies are conducted to explore the capabilities of a PMN-PT-based PA to detect damage in aluminum plates. Numerical simulations are conducted using the Local Interaction Simulation Approach (LISA) implemented on a parallelized graphical processing unit (GPU) for high-speed execution. Numerical studies are further validated using experimental tests conducted with a linear PA. The study confirms the ability of an PMN-PT phased array to accurately detect and localize damage in aluminum plates.
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Wentao Wang, Wentao Wang, Hui Zhang, Hui Zhang, Jerome P. Lynch, Jerome P. Lynch, Carlos E. S. Cesnik, Carlos E. S. Cesnik, Hui Li, Hui Li, } "Numerical and experimental simulation of linear shear piezoelectric phased arrays for structural health monitoring ", Proc. SPIE 10169, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure 2017, 1016912 (19 April 2017); doi: 10.1117/12.2262945; https://doi.org/10.1117/12.2262945
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