Electromechanical behavior of piezoelectric metamaterial with negative Poisson’s ratios for three kinds of connection

In this paper, the complete electromechanical properties of the cellular-materials-based piezoelectric metamaterial are obtained by using micromechanical modeling method on the basis of the finite element. This study considers the piezoelectric star-shaped cellular structures (PSSCSs) with three connection modes (with symmetric interconnects, with asymmetric interconnects, and without any interconnects) and two poling directions (longitudinal and transverse). The representative volume units of three types of PSSCSs are established respectively, and the finite element analysis is implemented to the effect of different structural length parameters on the effective electromechanical response and the applicability of specific engineering applications. Compared with the monolithic piezoelectric materials, the PSSCSs show an enhanced performance combination. Besides, the results show that PSSCSs have adjustable electromechanical properties.