Surface crack characterization using laser nonlinear ultrasonics based on the bispectrum

Laser nonlinear wave modulation spectroscopy (LNWMS) has been used to detect nonlinear ultrasonic signatures caused by fatigue cracks in materials. The nonlinear feature extraction from the spectral plot plays a significant role in LNWMS. This paper uses the bispectrum to distinguish harmonically re...

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Veröffentlicht in:	Measurement science & technology 2021-03, Vol.32 (3), p.35204
Hauptverfasser:	Liu, Hui, Wang, Zhaoba, Zheng, Bin
Format:	Artikel
Sprache:	eng
Schlagworte:	finite element method laser nonlinear wave modulation bispectrum (LNWMBS) noncontact laser ultrasonic surface cracks
Online-Zugang:	Volltext
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