Nonlinear elastic imaging with amplitude and frequency modulated low frequency sources - Le Mans Université Accéder directement au contenu
Article Dans Une Revue Applied Physics Letters Année : 2020

Nonlinear elastic imaging with amplitude and frequency modulated low frequency sources

Résumé

The use of low frequency waves is the most practical means to investigate nonlinear elastic properties of hysteretic media, such as the strain dependence of wave velocity. Indeed, the rapid increase in damping as a function of frequency makes high frequency waves unable to provide sufficient strain energy to successfully excite nonlinearity. The drawback is that low frequency waves are not suitable for imaging, due to their long wavelength and resulting intrinsic averaging of nonlinear effects over large spatial scales. To address this, we propose here an amplitude modulation of swept sources that allows us to correlate the frequency at which harmonics are detected with the position of the source of nonlinearity, taking advantage of the different strain distributions in the sample at different frequencies.
Fichier non déposé

Dates et versions

hal-02989183 , version 1 (05-11-2020)

Identifiants

Citer

Mourad Bentahar, C. Mechri, M. Scalerandi. Nonlinear elastic imaging with amplitude and frequency modulated low frequency sources. Applied Physics Letters, 2020, 117 (8), pp.084101. ⟨10.1063/5.0016357⟩. ⟨hal-02989183⟩
30 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More