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Korosh Khorshidi

Korosh Khorshidi

Academic rank: Associate Professor
ORCID: https://orcid.org/0000-0002-7321-972X
Education: PhD.
ScopusId: 23970920600
Faculty: Engineering
Address: Arak University
Phone: 086-32625720

Research

Title
Free Vibration Analysis of Multi-Layer Rectangular Plate with Two Magneto-Rheological Fluid Layers and a Flexible Core
Type
JournalPaper
Keywords
Vibration, Plate, Magnetorheological, Flexible Core, Exponential shear deformation theory
Year
2020
Journal Journal of Solid Mechanics
DOI
Researchers Mehdi Shekarzadeh ، Mohammad Medhi Najafizadeh ، Peyman Yousefi ، Alireza NezamAbadi ، Korosh Khorshidi

Abstract

In the present article, the free vibration analysis of a multi-layer rectangular plate with two magnetorheological (MR) fluid layers and a flexible core is investigated based on exponential shear deformation theory for the first time. In exponential shear deformation theory, exponential functions are used in terms of thickness coordinate to include the effect of transverse shear deformation and rotary inertia. The displacement of the flexible core is modeled using Frostig’s second order model which contains a polynomial with unknown coefficients. MR fluids viscosity can be varied by changing the magnetic field intensity. Therefore, they have the capability to change the stiffness and damping of a structure. The governing equations of motion have been derived using Hamilton`s principle. The Navier technique is employed to solve derived equations. To validate the accuracy of the derived equations, the results in a specific case are compared with available results in the literature, and a good agreement will be observed. Then, the effect of variation of some parameters such as magnetic field intensity, length to width ratio (a/b), length to thickness ratio (a/h), core thickness to panel thickness ratio (h_c/h) and MR layer thickness to panel thickness ratio (h_MR/h) on natural frequency of the sandwich panel is investigated.