Comparative Study of Leak Detection in PVC Water Pipes Using Ceramic, Polymer, and Surface Acoustic Wave Sensors

Autor: Najah Hamamed, Charfeddine Mechri, Taoufik Mhammedi, Nourdin Yaakoubi, Rachid El Guerjouma, Slim Bouaziz, Mohamed Haddar

Publikováno v: Sensors, Vol 23, Iss 18, p 7717 (2023)

The detection and location of pipeline leakage can be deduced from the time arrival leak signals measured by acoustic sensors placed at the pipe. Ongoing research in this field is primarily focused on refining techniques for accurately estimating the

Externí odkaz: https://doaj.org/article/4ac3916d8ba54aef83ef4e001e5cebea

3D Modelling of the Scattering of the Fundamental Anti-Symmetric Lamb Mode (A0) Propagating within a Point-Impacted Transverse-Isotropic Composite Plate

Autor: Dilbag Singh, Mourad Bentahar, Charfeddine Mechri, Rachid El Guerjouma

Publikováno v: Applied Sciences, Vol 11, Iss 16, p 7276 (2021)

The present paper deals with an effort to model impact damage in 3D-FE simulation. In this work, we studied the scattering behavior of an incident A0 guided wave mode propagating towards an impacted damaged zone created within a quasi-isotropic compo

Externí odkaz: https://doaj.org/article/a6ce43b8a338432089ce1fe12da207df

Role of slow dynamics in fast dynamics ultrasonic measurements

Autor: Antonio Gliozzi, A. Di Bella, Marco Scalerandi, Charfeddine Mechri, Mauro Tortello, M. Bentahar

Publikováno v: Communications in Nonlinear Science and Numerical Simulation
Communications in Nonlinear Science and Numerical Simulation, Elsevier, 2020, 91, pp.105452. ⟨10.1016/j.cnsns.2020.105452⟩

International audience; Nonlinear mesoscopic materials exhibit anomalous elastic nonlinearity in which fast and slow dynamics effects are mixed up. The former is an instantaneous nonlinear phenomenon due to the explicit strain dependence of velocity

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::40797dea0d3e6b6df18724932b50317f
http://hdl.handle.net/11583/2841977

Nonlinear Analysis of Damaged Metal-Based Composite Plates Using Guided Waves

Autor: Antonin Novak, M. Bentahar, R. El Guerjouma, Yousra Baccouche, Charfeddine Mechri

Publikováno v: Acta Acustica united with Acustica
Acta Acustica united with Acustica, Hirzel Verlag, 2017, 103 (6), pp.967-977. ⟨10.3813/AAA.919126⟩

International audience; Resonance experiments have already proved the high level of nonlinearity in complex materials, including microcracked composites. However, the nonlinear parameters related to elastic modulus and damping are defined around a gi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9e79d478a5b1eca224f8b7fc999d53b4
https://doi.org/10.3813/aaa.919126

Passive monitoring of nonlinear relaxation of cracked polymer concrete samples using Acoustic Emission

Autor: Charfeddine Mechri, Xiaoyang Yu, Mourad Bentahar, Silvio Montresor

Publikováno v: Journal of the Acoustical Society of America
Journal of the Acoustical Society of America, Acoustical Society of America, 2019, ⟨10.1121/1.5127519⟩

International audience; This work presents an acoustic emission (AE) monitoring ofslow dynamics in micro-cracked polymer concrete (PC) samples. Inorder to obtain calibrated damage states, AE was first used to characterize the micro-damage mechanisms

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd5b837a514890d048281386f8d41696
https://hal-univ-lemans.archives-ouvertes.fr/hal-02462731/document