Contrôle actif des vibrations des plaques nano composites multicouches en utilisant des éléments piézoélectriques.

Abstract

This work investigates active vibration control of multilayer functionally graded carbon nanotubes (CNTs) or graphene platelets (GPLs) reinforced polymer composite plates, covered with piezoelectric layers. The composite plates is composed of multilayers, and reinforced with uniform distribution (UD) of nanofillers, and linearly or non-linearly distribution through the thickness direction using power and exponential laws, these are Functionally Graded types: X, O, and A (FG-X, FG-O, and FG-A). The plate theory used in this work was the first-order shear deformation theory (FSDT). Thus, the mechanical properties of the nanofillers are supposed to vary through the thickness and are evaluated using a modified rule of mixture. This study utilizes the finite element method to investigate the behavior of a square plate under both static and dynamic loading conditions. The studied plate is discretized into nine-node quadratic elements, with five degrees of freedom in each node. The dynamic equations are solved using the Newmark integration method. A developed code has been implemented in Matlab software to get the numerical and graphical solutions for the present work. In this study, it was proven that the use of piezoelectric layers and exponential function leads to active vibration attenuation of polymer multilayer composite plates reinforced with functionally graded carbon nanotubes (CNTs) or graphene platelets (GPLs)