Journal ArticleDOI
Nonlinear self-modulation and subharmonic acoustic spectroscopy for damage detection and location
TLDR
In this article, a self-modulation mode of nonlinear acoustic vibrations of cracked defects has been analyzed and observed experimentally and attributed to the sum-frequency type resonance in a multi-degree of freedom system and include a subharmonic spectrum as a particular case.Abstract:
A self-modulation mode of nonlinear acoustic vibrations of cracked defects has been analyzed and observed experimentally. Spectral patterns of the self-modulation are attributed to the sum-frequency type resonance in a multi-degree-of-freedom system and include a subharmonic spectrum as a particular case. Both the subharmonic and self-modulation modes demonstrate a high localization around the defect and provide opportunities for early detection and recognition of damaged areas.read more
Citations
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A local defect resonance for linear and nonlinear ultrasonic thermography
TL;DR: In this article, a concept of local defect resonance is developed and applied to ultrasonic activation of defects, where the frequency match between the defect resonance frequency and the probing ultrasonic wave results in a substantial rise of a local defect temperature.
Proceedings ArticleDOI
Nonlinear electro-mechanical impedance spectroscopy for fatigue crack monitoring
Runye Lu,Yanfeng Shen +1 more
TL;DR: In this paper , a nonlinear Electro-Mechanical Impedance Spectroscopy (NEMIS) method was proposed for fatigue crack monitoring, which employs a temporal chirp-based interrogative excitation to obtain the impedance spectrum, and simultaneously captures the contact acoustic nonlinearity arising from fatigue crack interfaces.
Proceedings ArticleDOI
A study of bolt fastening evaluation using second harmonic ultrasonic pulse waves
Makoto Fukuda,Kazuhiko Imano +1 more
TL;DR: In this paper, an improved method for detecting the second harmonic components, from a bolt fastened with a nut, using the transmission method is constructed, and a hexagon head iron bolt was used in the experiments.
Journal ArticleDOI
Nonlinear Electro-Mechanical Impedance Spectroscopy for fatigue crack monitoring
TL;DR: In this article , a nonlinear Electro-Mechanical Impedance Spectroscopy (NEMIS) method was proposed for fatigue crack monitoring, which employs a temporal chirp interrogating signal to obtain the impedance spectra, and simultaneously captures the Contact Acoustic Nonlinearity (CAN) features.
References
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BookDOI
Review of Progress in Quantitative Nondestructive Evaluation
TL;DR: The Review of Progress in Quantitative NDE (ROPQN) as mentioned in this paper is the world's leading conference in reporting annually new research and development results in quantitative NDE and promotes communication between the research and engineering communities and emphasize current reporting of work in progress.
Journal ArticleDOI
Ultrasonics of non-linear contacts: propagation, reflection and NDE-applications
TL;DR: The results of experimental investigation of acoustic non-linear phenomena on contact boundaries are presented in this article, where simulation experiments demonstrated a threshold nonlinear distortion due to "clapping" and "kissing" mechanisms, multiple bifurcations and chaos development for contact vibrations.
Journal ArticleDOI
Instability, chaos, and "memory" in acoustic-wave-crack interaction.
Igor Yu. Solodov,B. A. Korshak +1 more
TL;DR: A new class of nonlinear acoustic phenomena has been observed for acoustic wave interactions with cracked defects in solids, and acoustic-wave impact on a crack is shown to exhibit amplitude hysteresis and storage for parametric and non linear acoustic effects.
Journal ArticleDOI
Sensitive imaging of an elastic nonlinear wave-scattering source in a solid
TL;DR: In this paper, the nonlinear response of a solid by modulation of a high by a low-frequency wave, and employing moving-window, synchronous detection is used to locate isolated nonlinear scattering source(s) in solids.
Journal ArticleDOI
Self-induced hysteresis for nonlinear acoustic waves in cracked material.
TL;DR: The proposed theoretical models attribute the phenomenon to hysteresis in transition of the acoustically forced oscillation of cracks from a nonclapping regime to a regime of clapping contacts.