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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Journal ArticleDOI
Evaluation of crack parameters by a nonlinear frequency-mixing laser ultrasonics method.
TL;DR: Local evaluation of several parameters of a crack is realized with a nonlinear laser ultrasonic method based on the detection of nonlinear frequency-mixing ultrasonic components at frequencies ωH±nωL (n an integer).
Journal ArticleDOI
Probing of laser-induced crack modulation by laser-monitored surface waves and surface skimming bulk waves
TL;DR: All-optical monitoring of the nonlinear motion of a surface-breaking crack is reported and it is observed that bulk acoustic waves skimming along the surface can be more sensitive to crack motion than Rayleigh surface waves.
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Ultrasound excited thermography: an efficient tool for the characterization of vertical cracks
Journal ArticleDOI
Structural damage identification in plates via nonlinear structural intensity maps.
TL;DR: A nonlinear structural intensity concept is presented as an approach for the identification of defects displaying nonlinear vibration behavior and the characterization and two dimensional visualization of nonlinear types of defects.
Journal ArticleDOI
Crack as modulator, detector and amplifier in structural health monitoring
TL;DR: In this article, a model of a one-dimensional cracked cantilever bar subjected to longitudinal harmonic excitation is used to analyse a nonlinear response as a way to monitor structural health.
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.