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Article Dans Une Revue IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control Année : 2010

Octave Omnidirectional Band Gap in a Three-Dimensional Phononic Crystal

Résumé

We report on the experimental observation of a one-octave-large omnidirectional elastic band gap for longitudinal waves in a three-dimensional phononic crystal consisting of face-centered-cubic arrays of close-packed steel beads in a solid epoxy matrix. The 60% relative width of the band gap is larger than expected based on the contrast in material properties, and is confirmed by band structure diagram and transmission spectra computations. The coupling between shear and longitudinal polarizations is pointed out as a mechanism for enlarging the band gap by comparing with the steel beads in water matrix case.
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hal-00539592 , version 1 (24-11-2010)

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Abdelkrim Khelif, Fu-Li Hsiao, Abdelkrim Choujaa, Sarah Benchabane, Vincent Laude. Octave Omnidirectional Band Gap in a Three-Dimensional Phononic Crystal. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2010, 57 (7), pp.1621-1625. ⟨10.1109/TUFFC.2010.1592⟩. ⟨hal-00539592⟩
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