Control of guided modes propagating in unconsolidated granular layers : Combined effects of local resonators and nonlinear elasticity

Autor: Pierric Mora, Mathieu Chekroun, Vincent Tournat

Publikováno v: The Journal of the Acoustical Society of America. 153:A234-A234

In this talk, we analyze the attenuation, by a line of local resonators, of guided surface modes propagating in an unconsolidated granular layer. Local resonators are made of dense solid parts added to the granular layer, mobilizing the elasticity of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d549fea5fb30c865a2454115871bab66
https://doi.org/10.1121/10.0018750

Nonlinear generation of a zero group velocity mode in an elastic plate by non-collinear mixing

Autor: Pierric Mora, Samuel Raetz, Vincent Tournat, Mathieu Chekroun

Publikováno v: Ultrasonics
Ultrasonics, 2022, 119, 14 p. ⟨10.1016/j.ultras.2021.106589⟩

Zero Group Velocity (ZGV) modes are peculiar guided waves that can exist in elastic plates or cylinders, and have proved to be very sensitive tools in characterizing materials or thickness variations with sub-percent accuracy at space resolutions of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9cdfcc115f263ad76287f8bdae418496
https://pubmed.ncbi.nlm.nih.gov/34571435

Air leak detection in a pressurized containment building mock-up using elastic guided waves

Autor: Stéphane Letourneur, Denis Vautrin, Guy d’ Urso, Mathieu Chekroun, Roberto Longo, Pierric Mora, Vincent Tournat

Publikováno v: NDT & E International
NDT & E International, Elsevier, 2021, pp.102553. ⟨10.1016/j.ndteint.2021.102553⟩

International audience; This article reports an experimental study of the vibrations induced by air leaks in realistic conditions reproducing a leak test of a containment building, such as those routinely conducted to probe the safety of nuclear powe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::07384b2c4b3c8fe519790d96928b4573
https://doi.org/10.1016/j.ndteint.2021.102553

Monitoring Cracks with Nonlinear Coda Wave Interferometry (NCWI): Numerical and Experimental Results

Autor: D. Pageot, Olivier Durand, Odile Abraham, Vincent Tournat, Guangzhi Chen, Mathieu Chekroun

Publikováno v: Scopus-Elsevier

In this paper, the Nonlinear Coda Wave Interferometry (NCWI) method is studied for an overall assessment of cracking levels in very heterogeneous materials. NCWI is an ultrasonic method that mixes the performance of coda wave interferometry, which ta

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::04ce7151652f42f3423c8ff37b6f05e9
https://doi.org/10.12783/shm2019/32402

Numerical modeling of nonlinear modulation of coda wave interferometry in a multiple scattering medium with the presence of a localized micro-cracked zone

Autor: Guangzhi Chen, D. Pageot, Vincent Tournat, Jean-Baptiste Legland, Odile Abraham, Mathieu Chekroun

Publikováno v: AIP Conference Proceedings
44TH ANNUAL REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION
44TH ANNUAL REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, Jul 2017, Provo, United States. ⟨10.1063/1.5031645⟩

The spectral element method is used to perform a parametric sensitivity study of the nonlinear coda wave interferometry (NCWI) method in a homogeneous sample with localized damage [1]. The influence of a strong pump wave on a localized nonlinear dama

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::68493bdf6f59472628506f7a8284ee8e
https://doi.org/10.1063/1.5031645