The Frequency Response of Intelligent Composite Sandwich Plate Under Biaxial In-Plane Forces

Subject Areas : Mechanical Engineering

A. A Ghorbanpour-Arani ¹ , Zahra Khoddami Maraghi ² , Ali Ghorbanpour Arani ³

1 - School of Mechnical Engineering, College of Engineering, University of Tehran, Tehran, Iran
2 -
3 -

Received: 2022-09-01 Accepted : 2022-11-17 Published : 2023-03-01

Keywords: Feedback control system, Sandwich structures, Nanocomposite core, Magnetostrictive face sheets,

Abstract :

This paper investigates the frequency response of a smart sandwich plate made of magnetic face sheets and reinforced core with nano-fibers. The effective elastic properties of composite core reinforced with carbon nanotube are estimated by the extended rule of Mixture. The orthotropic visco-Pasternak foundation is examined to study orthotropic angle, damping coefficient, normal, and shear modulus. The top and bottom face sheets of the sandwich are magnetic and their vibrations are controlled by a feedback control system and magneto-mechanical couplings. Also, the sandwich plate is subjected to the compression and extension in-plane forces in both x and y directions. Five coupled equations of motion are derived using Hamilton’s principle. These equations are solved by the differential quadrature method. The analysis performed by the third-order shear deformation theory (Reddy’s theory) shows useful details of the effective parameters such in-plane forces, modulus of elastic foundation, core-to-face sheet thickness ratio and controller effect of velocity feedback gain on the dimensionless frequency of the sandwich plate. The analysis of such structures can be discussed in the military, aerospace and civil industries.

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