Journal
SMART MATERIALS AND STRUCTURES
Volume 26, Issue 8, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-665X/aa7772
Keywords
periodic piezoelectric material; auxetic strain sensors; acoustic behavior
Funding
- Regione Puglia under the Future in Research Program Development of next generation NEMS for energy harvesting [NSUX1F1]
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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 electromechanical 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-elastodynamic 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.
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