TY  - JOUR
SN  - 0964-1726
VL  - 26
PB  - IOPScience
A1  - De Bellis, Maria Laura
A1  - Bacigalupo, Andrea
Y1  - 2017///
ID  - eprints3675
TI  - Auxetic behavior and acoustic properties of microstructured piezoelectric strain sensors
AV  - public
N2  - 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.
JF  - Smart Materials and Structures
UR  - https://doi.org/10.1088/1361-665X/aa7772
IS  - 8
ER  -