Nonlinear acoustic characterization of micro-damaged materials through higher harmonic resonance analysis

Novák, Antonín; Bentahar, Mourad; Tournat, Vincent; Guerjouma, Rachid El; Simon, Laurent

doi:10.1016/j.ndteint.2011.09.006

Cited by 77 publications

(51 citation statements)

References 32 publications

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“…At each frequency, the elastic softening is analyzed using the same definition as for the hysteretic parameter a f ¼ ð1=eÞðDf =f 0 Þ , Df being the resonance frequency shift due to the strain e and f 0 is the linear resonance frequency. 1,10 Figure 4(b) shows that a f follows the same frequency dispersion as a V . Furthermore, for all resonance frequencies a V is always ð1=2Þa f , showing an interesting relationship between standing waves and guided waves in NLH media.…”

Section: Flexural Waves In Nlh Platesmentioning

confidence: 89%

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Hysteretic nonlinearity analysis in damaged composite plates using guided waves

Baccouche

Bentahar

Mechri

et al. 2013

The Journal of the Acoustical Society of America

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Sensitivity of nonlinear acoustic methods to the presence and the evolution of micro-damage has been proven in various studies on a wide range of materials. In this contribution, a guided wave approach is proposed to characterize polymer based composite plates taken at intact as well as damaged states. The changes in the nonlinear hysteretic parameters are observed by changing the order of the excited flexural resonances. The analysis is based on the evolution of the velocity frequency dispersion of the generated guided waves, where flexural modes are considered separately and together as a function of the dynamic strain.

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Section: Flexural Waves In Nlh Platesmentioning

confidence: 89%

“…Finally, we are currently investigating the abovementioned NLH parameters at intermediate frequencies (between two consecutive resonances) using the method described in Ref. 10.…”

Section: Conclusion and Prospectsmentioning

confidence: 99%

Hysteretic nonlinearity analysis in damaged composite plates using guided waves

Baccouche

Bentahar

Mechri

et al. 2013

The Journal of the Acoustical Society of America

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“…They called this class of materials as mesoscopic materials where the elastic behavior was controlled by mesoscopic elements along the grain boundary. Following this, several researchers have used NEWS techniques to detect and quantify damage in composites and other materials [10][11][12][13][14][15][16][17][18][19]. Van Den Abeele demonstrated the use of NEWS techniques for detecting damage in fiber cemented plates.…”

Section: Introductionmentioning

confidence: 99%

“…Novak [18] studied the evolution of nonlinear response (which was defined as read factors) for different damage states.…”

Section: Introductionmentioning

confidence: 99%

“…This would lead one to believe that composites may exhibit mesoscopic behavior similar to rocks and concrete. The present study does not explore the possibilities of using nonlinear acoustic methods for damage detection in composites since it has been performed by various researchers [14][15][16][17][18][19]. Rather, it focuses on studying the inherent baseline nonlinearity of fiber-reinforced composites, which is the nonlinear response of the material in its intact or undamaged state.…”

Section: Introductionmentioning

confidence: 99%

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Inherent acoustic nonlinearity of fiber reinforced composites

Chakrapani

Barnard²,

Dayal³

2014

AIP Conference Proceedings

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Non Destructive Auscultation and Imaging of Damages by Distributed Sensor Array: Step Towards Passive SHM Under Real Conditions

Chehami¹,

Moulin²,

Terzi³

2021

Lecture Notes in Civil Engineering

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The passive imaging based on the Green's functions reconstruction from ambient noise correlation became a promising technique in structural health monitoring. Here, this approach is used to detect and locate linear defects (cracks, holes...) in thin reverberant plates with a small number of sensors. Correlation matrices before and after defect occurrence are estimated from friction noise. Based on a dispersive backpropagation algorithm in a thin plate, the differential matrix of correlations (before and after defect) is used for defect localization. This technique shows satisfactory results for linear defects, but refers to a measurement on a baseline healthy sample, which can be strongly affected by environmental conditions. In this context, an active baseline-free damage localization method that uses a repetitive pump-probe experiment, is proposed. A series of experiments are conducted in a thin aluminum plate using 7 PZTs sensors glued at known positions. One transducer generates a high frequency probe wave with central frequency 20 kHz, while a continuous low frequency pump of 1 Hz is produced by a shaker. A steel ball pressed against the plate to mimic a nonlinear defect is considered. The aim here is to produce solidsolid contact that will be modulated by the pump wave, as would be the case for instance in fatigue cracks. In order to enhance this effect, signals recorded at different times (corresponding to different loading states of the contact) are subtracted and back-propagated to locate the origin of the modulation.

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Nonlinear acoustic characterization of micro-damaged materials through higher harmonic resonance analysis

Cited by 77 publications

References 32 publications

Hysteretic nonlinearity analysis in damaged composite plates using guided waves

Hysteretic nonlinearity analysis in damaged composite plates using guided waves

Inherent acoustic nonlinearity of fiber reinforced composites

Non Destructive Auscultation and Imaging of Damages by Distributed Sensor Array: Step Towards Passive SHM Under Real Conditions

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