Experimental and Numerical Study on Characterization and Evaluation of Surface Cracks with Wireless Ultrasonic Sensor

<div>Amplitude of wave propagation with crack depth of 0.40 mm at two instants: (a) <i>t</i> = 14 <i>μ</i>s (peak of transmitted signal passes through the receiver); (b) <i>t</i> = 30 <i>μ</i>s (incident signal has passes through left boundary).</div>

Mathematical Problems in Engineering

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Figure 9

Figure 9: Experimental and Numerical Study on Characterization and Evaluation of Surface Cracks with Wireless Ultrasonic Sensor 