%0 Journal Article
%9 Working Paper
%@ 0964-1726
%A De Bellis, Maria Laura
%A Bacigalupo, Andrea
%D 2017
%F eprints:3675
%I IOPScience
%J Smart Materials and Structures
%N 8
%P 085037
%T Auxetic behavior and acoustic properties of microstructured piezoelectric strain sensors
%U http://eprints.imtlucca.it/3675/
%V 26
%X 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.