Modeling for nonlinear laser vibrometry ...
Type de document :
Communication dans un congrès avec actes
Titre :
Modeling for nonlinear laser vibrometry experiments in solids with frictional cracks
Auteur(s) :
Verma, Ravi [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Truyaert, Kevin [Auteur]
Aleshin, Vladislav [Auteur]
Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN [AIMAN-FILMS - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Truyaert, Kevin [Auteur]
Aleshin, Vladislav [Auteur]
Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN [AIMAN-FILMS - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Éditeur(s) ou directeur(s) scientifique(s) :
Carletti E.Crocker M.Pawelczyk M.Tuma J.
Titre de la manifestation scientifique :
27th International Congress on Sound and Vibration, ICSV 2021
Ville :
Virtual
Date de début de la manifestation scientifique :
2021-07-11
Éditeur :
Silesian University Press
Date de publication :
2021-07
Mot(s)-clé(s) en anglais :
Contact acoustic nonlinearity
Crack
Friction
Laser vibrometry
NDT
Crack
Friction
Laser vibrometry
NDT
Discipline(s) HAL :
Sciences de l'ingénieur [physics]
Résumé en anglais : [en]
Modeling for processes underlying NDT and SHM by ultrasound and vibrations present certain benefits. A valid digital tool can help accept or reject a hypothesis on damage position, orientation and degree of gravity. As a ...
Lire la suite >Modeling for processes underlying NDT and SHM by ultrasound and vibrations present certain benefits. A valid digital tool can help accept or reject a hypothesis on damage position, orientation and degree of gravity. As a final objective, a fully reconstructed damage configuration can supplement diagnostics by prognostics and help describe future evolution of damage in certain conditions. To do so, as a first step it is necessary to have a tool capable of describing acoustic waves in materials with inner contacts (cracks, delaminations, loose joints) with the account for a most pertinent phenomenon occurring in there, friction. Frictional interfaces have complex hysteretic response that depends on history of excitation. It is suggested to describe this response by using an original semi-analytical method of contact mechanics called the Method of Memory Diagrams (MMD). The MMD provides boundary conditions at crack faces necessary for the wave propagation description modeled via standard FEM software. The next step is a qualitative imitation of a nonlinear acoustic NDT experiment via the proposed model. Here we have implemented the MMD-FEM principle in a 2D case similar to the one typical for nonlinear laser vibrometry experiments. A piece of plate containing a frictional crack parallel to the surfaces is excited with a harmonic signal. Contact nonlinearity of the defect generates higher harmonics, in particular, in the normal displacement field at the top surface measurable in real vibrometry experiments. We show that the spatial harmonics' distribution indicates the position and the size of the crack. © "Advances in Acoustics, Noise and Vibration - 2021" Proceedings of the 27th International Congress on Sound and Vibration, ICSV 2021. All rights reserved.Lire moins >
Lire la suite >Modeling for processes underlying NDT and SHM by ultrasound and vibrations present certain benefits. A valid digital tool can help accept or reject a hypothesis on damage position, orientation and degree of gravity. As a final objective, a fully reconstructed damage configuration can supplement diagnostics by prognostics and help describe future evolution of damage in certain conditions. To do so, as a first step it is necessary to have a tool capable of describing acoustic waves in materials with inner contacts (cracks, delaminations, loose joints) with the account for a most pertinent phenomenon occurring in there, friction. Frictional interfaces have complex hysteretic response that depends on history of excitation. It is suggested to describe this response by using an original semi-analytical method of contact mechanics called the Method of Memory Diagrams (MMD). The MMD provides boundary conditions at crack faces necessary for the wave propagation description modeled via standard FEM software. The next step is a qualitative imitation of a nonlinear acoustic NDT experiment via the proposed model. Here we have implemented the MMD-FEM principle in a 2D case similar to the one typical for nonlinear laser vibrometry experiments. A piece of plate containing a frictional crack parallel to the surfaces is excited with a harmonic signal. Contact nonlinearity of the defect generates higher harmonics, in particular, in the normal displacement field at the top surface measurable in real vibrometry experiments. We show that the spatial harmonics' distribution indicates the position and the size of the crack. © "Advances in Acoustics, Noise and Vibration - 2021" Proceedings of the 27th International Congress on Sound and Vibration, ICSV 2021. All rights reserved.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Source :