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
Two dimensional nonlinear frequency-mixing photo-acoustic imaging of a crack and observation of crack phantoms
TL;DR: In this article, a two-dimensional imaging of a crack by nonlinear frequency-mixing photo-acoustic method is reported, where the imaging contrast is due to nonlinear photo-thermoacoustic processes taking place in case of simultaneous excitation by lasers of thermo-elastic and acoustic waves in the vicinity of the cracks.
Journal ArticleDOI
Second-harmonic generation of a linearly polarized laser pulse propagating through magnetized plasma in the presence of a planar magnetostatic wiggler
Mehdi Abedi-Varaki,Saed Jafari +1 more
TL;DR: In this article, the second-harmonic generation of a linearly polarized laser pulse propagating through magnetized plasma embedded in a planar magnetostatic wiggler was studied.
Journal ArticleDOI
Nonlinear feature of phase matched Lamb waves in solid plate
TL;DR: In this article, the second harmonic Lamb wave parameters were derived for the first time as a function of signal frequency, wave mode and geometric parameters of waveguides in an isotropic plate with weak nonlinearity.
Journal ArticleDOI
Nonlinear structural surface intensity: An application of contact acoustic nonlinearity to power flow based damage detection
TL;DR: In this article, the concept of structural surface intensity is extended to the nonlinear domain by introducing a physical quantity denominated nonlinear structural surfaces intensity (NSSI), which is formulated for mechanical systems whose dynamic response is governed by nonlinear harmonic frequencies due to contact nonlinearities.
Journal ArticleDOI
Dynamic nonlinearities for identification of the breathing crack type damage in reinforced concrete bridges
Srinivas Voggu,Saptarshi Sasmal +1 more
TL;DR: In this paper, reinforced concrete structures experience nonlinear vibration response because of softening in concrete due to damage, which results in unstable vibration, and considering the nonlinearity in vib
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.