%P 085037
%J Smart Materials and Structures
%T Auxetic behavior and acoustic properties of microstructured piezoelectric strain sensors
%R 10.1088/1361-665X/aa7772
%N 8
%V 26
%A Maria Laura De Bellis
%A Andrea Bacigalupo
%D 2017
%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.
%L eprints3675
%I IOPScience