Title :
The detection of second harmonic components of lamb waves generated from fatigue plate using a double-layered piezoelectric transducer
Author :
Fukuda, Makoto ; Imano, Kazuhiko ; Yamagishi, Hideki ; Sasaki, Katsuhiro
Author_Institution :
Dept. of Electr. & Electron. Eng., Akita Univ., Akita, Japan
Abstract :
Detections of second harmonic components generated from closed cracks created by fatigue tests using finite amplitude Lamb wave were carried out using double-layered piezoelectric transducer (DLPT) with pulse-echo method. Three pure magnesium (Mg) plates applied to fatigue test were used in this experiment. In a received waveform from the plate had fatigue test of 2 × 105 cycles, second harmonic component was increased by 6 dB compared with in the plate had 0 cycles. Thus, it was confirmed that second harmonic components detection system using DLPT was effective for detecting dislocations and closed cracks in the plates.
Keywords :
fatigue testing; harmonic analysis; piezoelectric transducers; surface acoustic waves; dislocation; double-layered piezoelectric transducer; fatigue plate; fatigue test; finite amplitude Lamb wave; lamb waves; pulse-echo method; pure magnesium plates; second harmonic component detection system; Acoustics; Fatigue; Harmonic analysis; Magnesium; Materials; Piezoelectric transducers; Time frequency analysis; Fatigue test; Lamb wave; Pulse-echo; Pure magnesium plate; Second harmonic ultrasonic waves;
Conference_Titel :
SICE Annual Conference (SICE), 2011 Proceedings of
Conference_Location :
Tokyo
Print_ISBN :
978-1-4577-0714-8
