VIBRATION ANALYSIS OF SANDWICH SMART PLATES BASED ON FLEXOELECTRICITY THEORY

Flexoelectricity, referring to the coupling between electric polarization and strain gradients, is a universal effect in all dielectrics and may become stronger at the nano-scale. The current study has tried to have a throughout focus and concentration on vibrational behaviors of sandwich plates. According to achieve abovcmentioned aim with a higher accuracy the flexoelectric effect assumes to be existed on the top and bottom face sheets and core is composite plate where reinforced by carbon nanotubes (CNTS). Also, based on statistics the first-order shear deformation theory (FSTD) seems lead to more accurate results. So, in present research we hire this method to obtain results. The effects of aspect ratio, thickness of llexoelectric layers, Pasternak foundation modulus and applied voltage on the frequency of the sandwich flexoeleetric plates are presented in detail. It is found that when thickness of flexoelectric face sheets increase, the natural frequency of nano-sandwich plate decrease. The results of this study can be useful in design and manufacturing of flexoelectric systems as sensor and actuator.