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
Nonlinear ultrasonic imaging method for closed cracks using subtraction of responses at different external loads.
TL;DR: This study performs fundamental experiments on a closed fatigue crack formed in an aluminum alloy compact tension (CT) specimen using the proposed subharmonic phased array for crack evaluation (SPACE) method and shows that this method is useful in extracting only the intensity change of responses related to closed cracks, while canceling the responses of objects other than cracks.
Journal ArticleDOI
Modelling nonlinearity of guided ultrasonic waves in fatigued materials using a nonlinear local interaction simulation approach and a spring model.
TL;DR: It was shown that with the use of the wave from the low frequency regime it was easier to differentiate later stages of the crack development, being in contrary to waves in the high frequency regime, which allowed to clearly observe early stages ofThe damage detection and monitoring scheme in the field of Structural Health Monitoring based on utilising the nonlinear features of guided ultrasonic waves.
Journal ArticleDOI
On the ultimate sensitivity of nonlinear-modulation method of crack detection
TL;DR: In this article, the authors performed the corresponding analysis and formulated criteria determining the minimal size of detectable cracks in railway axles and wheels and compared the results with experimental data obtained in nonlinear-modulation experiments on the detection of cracks.
Journal ArticleDOI
Periodic motions and resonances of impact oscillators
TL;DR: In this article, the eigenset of a bilinear oscillator with infinite stiffness in compression was investigated, and it was shown that the set of impact times is stable with respect to variation of initial conditions.
Journal ArticleDOI
2D finite element modeling of the non-collinear mixing method for detection and characterization of closed cracks
TL;DR: In this paper, a non-collinear mixing technique is applied for detection and characterization of closed cracks based on the nonlinear interaction of two shear waves generated with an oblique incidence, which leads to the scattering of a longitudinal wave.
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.