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3D Morphological Characterization of Phonic Insulation Fibrous Media
Author(s) -
Peyrega Charles,
Jeulin Dominique,
Delisée Christine,
Malvestio Jérôme
Publication year - 2011
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201000257
Subject(s) - tortuosity , materials science , isotropy , porous medium , transverse plane , geodesic , voxel , composite material , characterization (materials science) , porosity , perpendicular , granulometry , optics , geometry , computer science , physics , mathematics , geology , anatomy , medicine , artificial intelligence , nanotechnology , paleontology , sediment
In the framework of the Silent Wall ANR project, the CMM and the US2B are associated in order to characterize and to model fibrous media studying 3D images acquired with an X‐Ray microtomograph used by the US2B. The device can make 3D images of maximal size 2304 3 voxels with resolutions in the range of 2–15 µm. Using mathematical morphology, measurements on the 3D X‐Ray CT images are performed to characterize materials. For example, measuring the covariance on these images of an acoustic insulating material made of wooden fibers highlights the transverse isotropy of the fibers orientations in the xOy planes perpendicular to the compression Oz axis. Moreover, it is possible to extract other morphological properties, such as the size distribution either of the fibers or of the pores by estimating the morphological opening granulometry of the considered medium. Finally the morphological tortuosity of the fibrous and porous networks are estimated from geodesic propagations. The tortuosity is a parameter which can help to link physical, acoustic, and morphological properties of the material. Moreover the effects of the boundary layer, where viscous and thermal damping of the sound take place, are studied from the point of view of the tortuosity.