Vibration control of rotating sandwich cylindrical shell-reinforced nanocomposite face sheet and porous core integrated with functionally graded magneto-electro-elastic layers

Rostami, Rasoul; Mohammadimehr, Mehdi

doi:10.1007/s00366-020-01052-5

Cited by 20 publications

(3 citation statements)

References 48 publications

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“…The FSDT is used to study the wave propagations in the cylindrical metal foam shells rested on a variable elastic foundation [32]. Functionally graded electromagnetic layers are used for controlling the vibration behaviours of rotating cylindrical shells with a metal foam core and nanocomposite faces [33]. A comprehensive review based on the structural behaviours of metal foam structures can be found in [34].…”

Section: Introductionmentioning

confidence: 99%

Finite element formulation of metal foam microbeams via modified strain gradient theory

Karamanlı

Cívalek

2022

Engineering with Computers

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Size-dependent behaviours of metal foam microbeams with three different porosity distribution models are studied in this paper. Based on finite element model, a normal and shear deformation theory has been employed for the first time to investigate their structural behaviours by using modified strain gradient theory and considering the effects of variable material length scale parameter. The equations of motion and boundary conditions of system are derived from Hamilton's principle. Finite element models are presented for the computation of deflections, vibration frequencies and buckling loads of the metal foam microbeams. The verification of proposed models is carried out with comparison of the numerical results available in the literature. Calculations using the different parameters reveal the effects of the porosity parameters (distribution and coefficient), small size, boundary conditions and Poisson's ratio on the displacements, frequencies and buckling loads of metal foam microbeams. Some benchmark results of these structures for both models (modified couple stress theory and modified strain gradient theory with constant and variable material length scale parameter) and with/without Poison's effect are provided for future study.

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Section: Introductionmentioning

confidence: 99%

Finite element formulation of metal foam microbeams via modified strain gradient theory

Karamanlı

Cívalek

2022

Engineering with Computers

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“…Tere are various solutions for the free vibration analysis of the RCS; for example, some scholars used Galerkin's method to analyze the free vibration characteristics of the RCS [1][2][3][4][5], and the diferential quadrature method was also used to study the traveling wave properties of the free vibration for the RCS [6][7][8][9][10][11]. In addition, Ritz method was relatively simple in calculation process and could maintain high accuracy, so it was widely used in the research of vibration characteristics of RCS.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Free Vibration of Rotating Cylindrical Shells with Variable Thickness

Xiangdong,

Xiaoli,

Bin

et al. 2023

Shock and Vibration

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In order to improve the performance and efficiency of the rotating cylindrical shell (RCS), one of the effective ways reduces the mass of the RCS. The scientific and effective method is to design the variable thickness of RCS (VTRCS) along the axial direction in response to this demand. Then, the vibration traveling wave characteristics of VTRCS are investigated by Chebyshev–Ritz method. The displacement field of the cylindrical shell is expanded in the form of the product of the Chebyshev polynomial and the boundary function. The kinetic and potential energies of the VTRCS are calculated based on the Sanders shell theory considering the effects of Coriolis forces and centrifugal forces. Also, the frequency equation of the VTRCS is obtained according to the Ritz method. The accuracy of the modeling method is verified by comparing the present results with literature that had done, and the convergence of the calculated results is studied. Finally, the free-vibration traveling wave characteristics of the VTRCS in different thickness variations are compared, and the parameters such as the rotational speed, thickness variation parameters, and aspect ratio on the free-vibration traveling wave characteristics of the VTRCS are discussed. The influence of thickness variation on the vibration characteristics is analyzed, which has significance for the lightweight design for VTRCS.

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“…Also, they analyzed nonlinear thermal stability behavior of temperature-dependent FG carbon nanotube-reinforced plates using variational differential quadrature method [12,13]. Rostami and Mohammadimehr [14] carried out the oscillation control of rotating multilayer composite cylindrical shells having a porous core.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear oscillations of elliptical and sector prefabricated nanoplate-type structures made of functionally graded building material

2021

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The primary goal of this work is to apply for the first time the efficient isogeometric type of numerical solving technique for the geometrically nonlinear large-amplitude oscillations of nanoplates with arbitrary shapes with variable thicknesses incorporating simultaneously strain gradient size and nonlocality dependencies. Microplate thickness variation follows convex, concave, and linear patterns. Accordingly, isogeometric analysis is carried out to obtain precise geometrical description and higher-order efficient smoothness related to thickness variation within an arbitrary shape with no difficulty in meshing. It is assumed that nanoplates are made of functionally graded composite materials with variable material properties at different thicknesses. It is found that changing thickness variation pattern from convex to linear, and finally to concave increases the significance of both nonlocality and strain gradient size effects. Moreover, it is demonstrated that by increasing plate deflection and material gradient index, the contributions of strain gradient and nonlocal stress to the nonlinear frequency of functionally graded composite nanoplates are weakened.

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Vibration control of rotating sandwich cylindrical shell-reinforced nanocomposite face sheet and porous core integrated with functionally graded magneto-electro-elastic layers

Cited by 20 publications

References 48 publications

Finite element formulation of metal foam microbeams via modified strain gradient theory

Finite element formulation of metal foam microbeams via modified strain gradient theory

Investigation on Free Vibration of Rotating Cylindrical Shells with Variable Thickness

Nonlinear oscillations of elliptical and sector prefabricated nanoplate-type structures made of functionally graded building material

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