De Bellis, Maria Laura and Bacigalupo, Andrea Auxetic behavior and acoustic properties of microstructured piezoelectric strain sensors. Smart Materials and Structures, 26 (8). 085037. ISSN 0964-1726 (2017)
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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: | Article |
|---|---|
| Identification Number: | 10.1088/1361-665X/aa7772 |
| 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: | 18 Sep 2017 09:30 |
| URI: | http://eprints.imtlucca.it/id/eprint/3675 |
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