Abstract
Purpose – The purpose of this research is to extract the natural frequencies of a circular plate containing a
central hole reinforced with boron nitride nanotubes (BNNTs) and containing piezoelectric layers.
Design/methodology/approach – A unit cell shall be taken into account for the simulation of BNNT’s
volume fraction. A rectangular micromechanical model is used to obtain the mechanical properties of unit cell
of piezoelectric fiber-reinforced composite (PFRC). The three-dimensional (3D) elasticity method is presented to
provide the relationship between displacements and stresses. The one-dimensional differential quadrature
method (1D-DQM) and the state-space methodology are combined to create the semi-analytical technique. The
state-space approach is utilized to implement an analytical resolution in the thickness direction, and 1D-DQM is
used to implement an approximation solution in the radial direction. The composite consists of a
polyvinylidene fluoride (PVDF) matrix and BNNTs as reinforcement.
Findings – A study on the PFRC is carried, likewise, the coefficients of its properties are obtained using a
micro-electromechanical model known as the rectangular model. To implement the DQM, the plate was radially
divided into sample points, each with eight state variables. The boundary situation and DQM are used to
discretize the state-space equations, and the top and bottom application surface conditions are used to
determine the natural frequencies of the plate. The model’s convergence is assessed. Additionally, the
dimensionless frequency is compared to earlier works and ABAQUS simulation in order to validate the model.
Finally, the effects of the thickness, lateral wavenumber, boundary conditions and BNNT volume fraction on
the annular plate’s free vibration are investigated. The important achievements are that increasing the volume
fraction of BNNTs increases the natural frequency.
Originality/value – The micromechanical “XY rectangle” model in PFRC al