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Auxetic behavior and acoustic properties of microstructured piezoelectric strain sensors

De Bellis, Maria Laura and Bacigalupo, Andrea Auxetic behavior and acoustic properties of microstructured piezoelectric strain sensors. Working Paper arXiv (Submitted)

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Abstract

The use of multifunctional composite materials adopting piezo-electric periodic cellular lattice structures with auxetic elastic behavior is a recent and promising solution in the design of piezoelectric sensors. In the present work, periodic anti-tetrachiral auxetic lattice structures, characterized by different geometries, are taken into account and the mechanical and piezoelectrical response are investigated. The equivalent piezoelectric properties are obtained adopting a first order computational homogenization approach, generalized to the case of electro-mechanical coupling, and various polarization directions are adopted. Two examples of in-plane and out-of-plane strain sensors are proposed as design concepts. Moreover, a piezo-elasto-dynamic dispersion analysis adopting the Floquet-Bloch decomposition is performed. The acoustic behavior of the periodic piezoelectric material with auxetic topology is studied and possible band gaps are detected.

Item Type: Working Paper (Working Paper)
Identification Number: arXiv:1703.01144
Subjects: T Technology > T Technology (General)
T Technology > TJ Mechanical engineering and machinery
Research Area: Computer Science and Applications
Depositing User: Caterina Tangheroni
Date Deposited: 21 Mar 2017 12:24
Last Modified: 21 Mar 2017 12:24
URI: http://eprints.imtlucca.it/id/eprint/3675

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