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Communication Dans Un Congrès Année : 2014

Kirigami pyramidal auxetic active core for wave propagation control

Résumé

The work describes the design and modeling of a novel pyramidal core with auxetic (negative Poisson’s ratio) characteristics able to embed active distributed systems for wave propagation and vibroacoustics control. The core is made using Kirigami (Origami + cuts) techniques, which are inspired to the cutting/folding processes diffused in Asia from Japan since the 17th century. The Kirigami structure has a pyramidal unit cell shape that creates an in-plane negative Poisson’s ratio behavior isotropic behavior. Mechanical analysis show that the in-plane elastic properties (Young’s and shear modulus) are higher than the out-of-plane ones, a feature not observed in other centresymmetric honeycomb configurations. The core shows also evanescence patterns in 2D wave propagation analysis, even when small hysteretic damping of the core material is considered. Tailoring the dynamical behavior of wave-guide structures can provide an efficient and physically elegant approach for optimizing mechanical components with regards to vibroacoustic propagation. Architectured materials as pyramidal core Kirigami cells and smart systems can be used to improve the vibroacoustic quality of structural components. Recently, much effort has been spent on developing new multifunctional structures integrating smart cells systems in order to optimize their vibroacoustic behavior over a larger frequency band of interest. Metacomposite concept based on shunted piezocomposites patches (MFC) glued onto periodic cores also appears as a very promising way for reaching optimal vibroacoustic functionalities. This paper presents an integrated methodology for optimizing vibrating energy flow in interaction with pyramidal core Kirigami equipped with shunted MFC patches. The computation of the Floquet-Bloch propagators is used to optimize vibration absorption and band gap structures depending on the core design parameters and shunt impedance. We can also compare the obtained efficiency with first published realizations.
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Dates et versions

hal-02300543 , version 1 (29-09-2019)

Identifiants

  • HAL Id : hal-02300543 , version 1

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Manuel Collet, Morvan Ouisse, Fabrizio Scarpa, Mohamed Ichchou. Kirigami pyramidal auxetic active core for wave propagation control. International Conference on Adaptive Structures and Technologies, Oct 2014, The Hague, Netherlands. ⟨hal-02300543⟩
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