Ultrasonic characterization of fluid saturated absorbing polymethylacrylate porous plates
| Autor: | Bertrand Nongaillard, Pierre Campistron, Serge Derible, Georges Freiha, Hervé Franklin |
|---|---|
| Přispěvatelé: | Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF) |
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Materials science
Acoustics and Ultrasonics Biot number business.industry 01 natural sciences Viscoelasticity Characterization (materials science) 03 medical and health sciences 0302 clinical medicine Optics Reflection (mathematics) Transducer Arts and Humanities (miscellaneous) 0103 physical sciences Ultrasonic sensor Composite material 030223 otorhinolaryngology business Porous medium Porosity 010301 acoustics |
| Zdroj: | Joint 159th ASA Meeting and Noise-Con 2010 Joint 159th ASA Meeting and Noise-Con 2010, 2010, Baltimore, MD, United States |
| Popis: | Experiments are led on five manufactured porous polymethylmethacrylate (PMMA) samples, numbered 1–5. Their constituting materials are packed beads whose diameters run from 200–300 μm for plate 1 up to 600–700 μm for plate 5. The plates are normally insonified by wide band transducers acting within the frequency range 100–800 kHz. The samples obey Biot’s theory taking into account the viscoelasticity of the solid frame. The reflection and transmission coefficients are measured and then added or subtracted to give the two transition terms, issued from S‐matrix theory. They are connected to the symmetrical or asymmetrical motions of the faces of the plates. Those terms allow us a characterization of the porous media by means of a computer program that seeks the values of the Biot parameters giving the best agreement between theory and experiments. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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