Excitation and Propagation of Longitudinal L (0, 2) Mode Ultrasonic Guided Waves for the Detection of Damages in Hexagonal Pipes: Numerical and Experimental Studies

Figure 16

Experimental setups: (a) experimental platform; (b) the configuration of a ring of PZTs with the size of 25 mm × 5 mm ×0.5 mm; (c) a ring of PZTs with the size of 30 mm × 5 mm × 0.5 mm; (d) experimental specimen of hexagonal pipes; (e) circular hole damage located in the center of a surface plane; (f) circular hole damage near the edge of a surface plane; and (g) slot damage located at the edge with its dimensions.

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