Nonlocal Vibration Behaviour of a Pasternak Bonded Double-Piezoelectric-DWBNNT- Reinforced Microplate-System

چکیده مقاله

The aim of the paper is to analyze electro-thermo nonlinear vibration of a double-piezoelectric composite microplate- system (DPCMPS) based on nonlocal piezoelasticity theory. The two microplates are assumed to be connected by an enclosing elastic medium which is simulated by Pasternak foundation. Both of piezoelectric composite microplates are made of poly-vinylidene fluoride (PVDF) reinforced by zigzag double walled boron nitride nanotubes (DWBNNTs). The micro-electromechanical model is employed to calculate mechanical, thermal and electrical properties of composite. Differential quadrature method (DQM) is employed to solve the governing differential equations. The frequency ratio of DPCMPS is investigated for three typical vibrational states, namely, out-of-phase, in-phase and the case when one microplate is fixed in the DPCMPS. A detailed parametric study is conducted to scrutinize the influences of the small scale coefficient and stiffness of the internal elastic medium.