This paper presented a numerical simulation of the ultrasonic pulse-echo inspection test, which is potentially a powerful means for QNDE (quantitative non-destructive evaluation) of cracks and flaws of steel structures. The vibration equations of elastic waves for planar rectangular domains with various types of flaws are solved by the finite element method, which can represent flaws of arbitrary shapes. Normal and transverse input ultrasonic pulses are simulated by applying distributed time-varying forces on the boundaries. Wave propagation, reflection, and scattering at the flaws are investigated to draw important information on QNDE. The crack depth is evaluated based on output waves. The validity of the numerical simulation has been shown by the comparison between analysis and experiment.
|Number of pages||10|
|Journal||Doboku Gakkai Rombun-Hokokushu/Proceedings of the Japan Society of Civil Engineers|
|Issue number||459 pt 1-22|
|Publication status||Published - 1993|
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