Magneto-Thermo mechanical vibration analysis of FG nanoplate embedded on Visco Pasternak foundation

Publish Year: 1397
نوع سند: مقاله ژورنالی
زبان: English
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JR_JCAM-49-2_020

تاریخ نمایه سازی: 18 تیر 1398

Abstract:

In this study, the vibration behavior of functional graded (FG) circular and annular nanoplate embedded in Visco-Pasternak foundation and coupled with temperature change is studied. It is assumed that a uniform radial magnetic field acts on the top surface of the plate and the magnetic permeability coefficient of the plate along its thickness are assumed to vary according to the volume distribution function. The effect of in-plane pre-load and temperature change are investigated on the vibration frequencies of FG nanoplate. The FG nanoplate is coupled by an enclosing viscoelastic medium which is simulated as a Visco- Pasternak foundation. By using the modified strain gradient theory (MSGT) and the modified couple stress theory (MCST), the governing equation is derived for FG circular and annular nanoplate. The DQM and the Galerkin method are utilized to solve the governing equation to obtain the frequency vibration. The effects of the size dependent, the in-plane pre-load, the temperature change, the magnetic field, the power index parameter, the elastic medium and the boundary conditions on the natural frequencies are investigated. The temperature change plays an important role in the mechanical behavior of the FG circular and annular nanoplate. According to the results, the application of radial magnetic field to the top surface of the plate changes the state of stress in both tangential and radial direction. The present analysis results can be used for the design of the next generation of nano-devices that make use of the thermal vibration properties of the nanoplate.

Keywords:

Circular and annular nanoplate , Functional graded nanoplate , Modified strain gradient theory , Modified couple stress theory

Authors

Abbas Moradi

Department of Mechanical Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran

Amin Yaghootian

Department of Mechanical Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran

Mehdi Jalalvand

Department of Mathematics and Computer Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran

Afshin Ghanbarzadeh

Department of Mechanical Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran

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