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Article Dans Une Revue Journal of the Acoustical Society of America Année : 2020

Two-component versus three-component metasolids

Résumé

Analytic analysis and parametric investigation are employed to study and compare metamaterial properties of two types of composite metasolids. Metasolids are composed of either an elastic inclusion or a rigid core coated by an elastic material, embedded in a stiff matrix. For these types of materials, results related to cylindrical as well as spherical inclusions are presented. Such mono-inclusion two-component and bi-inclusion three-component metasolids have been previously known to exhibit negative mass density near local-resonance frequencies. Through a unified formulation, it is analytically shown how and why adding a rigid mass inside the elastic inclusion to make a bi-inclusion three-component material can dramatically change the homogenized property of the resultant inclusion and increase the tunability of the composite, particularly in terms of local-resonance frequencies and the associated metamaterial-effect frequency bandwidth. In this way, concerning distinctly sound and vibration insulation, a lowfrequency metamaterial effect with larger bandwidth can be designed via an inverse problem using a simplified mass-spring model. V
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Dates et versions

hal-03059349 , version 1 (12-12-2020)
hal-03059349 , version 2 (15-03-2021)

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Elie Favier, Navid Nemati, Camille Perrot. Two-component versus three-component metasolids. Journal of the Acoustical Society of America, 2020, 148 (5), pp.3065 - 3074. ⟨10.1121/10.0002424⟩. ⟨hal-03059349v1⟩
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