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
A Study of the LCF Characteristics of the Ni-based Superalloy IN738LC
TL;DR: In this article, the subharmonic nonlinearity parameter was first introduced to assess the low cycle fatigued IN738LC, and then additional LCF tests were conducted according to the extent of damage, in order to observe the change in mechanical properties the severity of damage.
Probing Interface Elastic Nonlinearity Applying Nonlinear Resonance Ultrasound Spectroscopy: The Case of Screw Tightness-of-t
Jacques Rivi,Guillaume Renaud,Sylvain Haupert,Maryline Talmant,Pascal Laugier,Paul A. Johnson +5 more
TL;DR: In this article, a bolt is progressively tightened in an aluminium plate in an evolving interface in the range 1-25 kHz and nonlinear parameters expressing the importance of resonance frequency and damping variations are extracted.
Journal ArticleDOI
Diagnostics of metal plates with residual stresses and defects by nonlinear scanning laser vibrometry
TL;DR: In this paper, the eigenmode frequency of a cylindrical resonator was found to depend on the amplitude of flexural Lamb waves excited in it, which points to the presence of a nonclassical nonlinear elasticity in the resonator material.
Journal ArticleDOI
Study on the Nonlinear Electromagnetic Acoustic Resonance Method for the Evaluation of Hidden Damage in a Metallic Material
TL;DR: In this article, the NEMAR method uses noncontact electromagnetic acoustic transducers (EMATs) in order to minimize the effect of the transducers on the frequency response of the object.
Proceedings ArticleDOI
Fatigue damage localization using time-domain features extracted from nonlinear lamb waves
TL;DR: This approach uses a permanently attached sensor network that well accommodates automated online health monitoring, and utilizes time-domain information of higher-order harmonics from time-frequency analysis, and demonstrates a great potential for quantitative characterization of small-scale damage with improved localization accuracy.
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.