科研之友
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摘要
Detections of second-harmonic components generated from fatigue-tested plates using finite amplitude Lamb waves were carried out using a double-layered piezoelectric transducer (DLPT) with a pulse-echo method. Three pure magnesium (Mg) plates subjected to fatigue tests of 0, 1 x 10(5), and 2 x 10(5) cycles were used in this experiment. In a received waveform from the plate subjected to the fatigue test of 2 x 10(5) cycles, a second-harmonic component was increased by 10 dB compared with that in the case of an unstressed plate. The usefulness of the DLPT system for detecting second-harmonic components of Lamb waves in the pulse-echo method was confirmed.
- 出版日期2012-7
