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Communication Dans Un Congrès Année : 2015

Full characterization of rigid porous material through ultrasonic reflected waves at oblique incidence.

Résumé

An improved method is proposed for measuring porosity, tortuosity, viscous and thermal characteristic length of porous materials having a rigid frame via reflected ultrasonic waves at oblique incidence. The conventional ultrasonic approach can be used to determine all the parameters via transmitted waves [1] or using the rst and second reflected waves at normal incidence[2] (the ratio between the viscous and thermal characteristic lengths is xed as in classical acoustic methods [3,4]). The advantage of the proposed method is that the four parameters are determined simultaneously just using reflected experimental waves for a porous material saturated by air. In addition, no relationship is assumed between the two characteristic lengths. The inverse problem is solved based on the least-square numerical method using experimental refllected waves in time domain. Tests are performed using industrial plastic foams. Experimental and numerical validation results of this method are presented. Reference [1] ZEA Fellah, M Sadouki, M Fellah, F. G Mitri, E Ogam, C Depollier." Simultaneous determination of porosity, tortuosity, viscous and thermal characteristic lengths of rigid porous materials" J. Appl. Phys, 114, 204902 (2013); [2] Z. E. A. Fellah, M. Fellah, W. Lauriks, and C. Depollier, "Direct and inverse scattering of transient acoustic waves by a slab of rigid porous material" J. Acoust. Soc. Am. 113, 61-73 (2003). [3] C. Ayrault, A. Moussatov, B. Castagnede, and D. Lafarge, "Ultrasonic characterization of plastic foams via measurements with static pressure variations" Appl. Phys. Lett. 74, 3224-3226 (1999). [4] A. Moussatov, C. Ayrault, and B. Castagne`de, "ultrasonic method for estimation of tortuosity and characteristic length using a barometric chamber" Ultrasonics 39, 195-202 (2001).
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Dates et versions

hal-01309344 , version 1 (29-04-2016)

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  • HAL Id : hal-01309344 , version 1

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Mustapha Sadouki, Amine Berbiche, Mohamed Fellah, Z.E.A Fellah, Claude Depollier. Full characterization of rigid porous material through ultrasonic reflected waves at oblique incidence.. 2015 International Congress on Ultrasonics, May 2015, Metz, France. ⟨hal-01309344⟩
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