4 April 2012 Experimental comparison of 2D arrays topologies for SHM of planar structures
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In this paper we present a new methodology for theoretical, numerical and experimental investigations of various 2D arrays' topologies. The theoretical evaluation is performed using frequency-dependent structure transfer function that affects propagation of Lamb waves (LWs) through the dispersive medium and enables investigation of the arrays' performance for a defined excitation signal. The numerical simulations are conducted using local interaction simulation approach (LISA) implemented on the NVIDIA R CUDA R graphical processing unit (GPU), which considerably accelerates 3D simulations of LWs propagation in a short time period. Finally, scanning laser vibrometer is used to sense the LWs excited by PZT transducers, in multiple points corresponding to the locations of the 2D array elements. In this way performance of various array architectures in the reception mode can be evaluated experimentally without the need of physical prototype - a change of topology requires only straightforward modification of the measurement points' distribution at the tested plate.
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Lukasz Ambrozinski, Lukasz Ambrozinski, Pawel Packo, Pawel Packo, Tadeusz Stepinski, Tadeusz Stepinski, Tadeusz Uhl, Tadeusz Uhl, } "Experimental comparison of 2D arrays topologies for SHM of planar structures", Proc. SPIE 8347, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2012, 834717 (4 April 2012); doi: 10.1117/12.917438; https://doi.org/10.1117/12.917438

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