Quasi-3D Hyperbolic Shear Deformation Theory for the Free Vibration Study of Honeycomb Microplates with Graphene Nanoplatelets-Reinforced Epoxy Skins

Arshid, Hossein; Khorasani, Manouchehr; Soleimani‐Javid, Zeinab; Dimitri, Rossana; Tornabene, Francesco

doi:10.3390/molecules25215085

Cited by 30 publications

(4 citation statements)

References 44 publications

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“…The hydrothermal preparation process is illustrated in Figure 1 for rGOA-200. The procedure involved three main steps: (1) sonication to obtain a 10 mg·L −1 IGGO precursor dispersion (pH = 7.0); (2) partial hydrothermal reduction of oxygen-containing functional groups distributed on the IGGO surface and promotion of rGO sheet self-assembly into the rGO hydrogel; (3) lyophilization to minimize the capillary force and achieve the rGOA three-dimensional (3D) network structure [ 27 , 28 , 29 ]. The hydrothermal synthesis temperature was believed to be a significant factor affecting the textural properties and hydrophobicity of rGOA materials [ 27 , 30 , 31 , 32 ].…”

Section: Resultsmentioning

confidence: 99%

The Effects of Hydrophobicity and Textural Properties on Hexamethyldisiloxane Adsorption in Reduced Graphene Oxide Aerogels

Hou

Zheng

et al. 2021

Molecules

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To expand the applications of graphene-based materials to biogas purification, a series of reduced graphene oxide aerogels (rGOAs) were prepared from industrial grade graphene oxide using a simple hydrothermal method. The influences of the hydrothermal preparation temperature on the textural properties, hydrophobicity and physisorption behavior of the rGOAs were investigated using a range of physical and spectroscopic techniques. The results showed that the rGOAs had a macro-porous three-dimensional network structure. Raising the hydrothermal treatment temperature reduced the number of oxygen-containing groups, whereas the specific surface area (SBET), micropore volume (Vmicro) and water contact angle values of the rGOAs all increased. The dynamic adsorption properties of the rGOAs towards hexamethyldisiloxane (L2) increased with increasing hydrothermal treatment temperature and the breakthrough adsorption capacity showed a significant linear association with SBET, Vmicro and contact angle. There was a significant negative association between the breakthrough time and inlet concentration of L2, and the relationship could be reliably predicted with a simple empirical formula. L2 adsorption also increased with decreasing bed temperature. Saturated rGOAs were readily regenerated by a brief heat-treatment at 100 °C. This study has demonstrated the potential of novel rGOA for applications using adsorbents to remove siloxanes from biogas.

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Section: Resultsmentioning

confidence: 99%

The Effects of Hydrophobicity and Textural Properties on Hexamethyldisiloxane Adsorption in Reduced Graphene Oxide Aerogels

Hou

Zheng

et al. 2021

Molecules

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“…Furthermore, for the honeycomb layer, the stress components

σ_{i j}^{(2)}

are given by [ 30 ]

\begin{array}{l} left & {\begin{matrix} σ_{1} \\ σ_{2} \\ σ_{3} \\ σ_{4} \\ σ_{5} \\ σ_{6} \end{matrix}}^{(2)} & = {[\begin{matrix} {\overset{Q}{true}}_{11} & {\overset{Q}{true}}_{12} & {\overset{Q}{true}}_{13} & 0 & 0 & 0 \\ {\overset{Q}{true}}_{12} & {\overset{Q}{true}}_{22} & {\overset{Q}{true}}_{23} & 0 & 0 & 0 \\ {\overset{Q}{true}}_{13} & {\overset{Q}{true}}_{23} & {\overset{Q}{true}}_{33} & 0 & 0 & 0 \\ 0 & 0 & 0 & {\overset{Q}{true}}_{44} & 0 & 0 \\ 0 & 0 & 0 & 0 & {\overset{Q}{true}}_{55} & 0 \\ 0 & 0 & 0 & 0 & 0 & {\overset{Q}{true}}_{66} \end{matrix}]}^{(2)} {\begin{matrix} ε_{1} \\ ε_{2} \\ ε_{3} \\ ε_{4} \\ ε_{5} \\ ε_{6} \end{matrix}} \end{array}

where the elastic coefficients of the honeycomb core are given as [ 54 ] …”

Section: Mathematical Analysismentioning

confidence: 99%

Magnetic Control of Vibrational Behavior of Smart FG Sandwich Plates with Honeycomb Core via a Quasi‐3D Plate Theory

Sobhy

Mukahal

2023

Adv Eng Mater

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Herein, vibrational behavior of functionally graded (FG) smart piezoelectric sandwich plates with honeycomb core resting on viscoelastic foundation under the effect of 2D magnetic field is presented. By varying the magnetic-field magnitude and its direction, the vibrations can be controlled. The plate is composed of two FG piezoelectric layers bonded with honeycomb structure as a mid-layer. Magnetic Lorentz force will be deduced via Maxwell's relations. A new quasi-3D plate theory considering the shear and normal deformations is incorporated to evaluate the displacements. The governing equations of motion are introduced via Hamilton's principle. Galerkin technique is considered to solve the motion equations for different boundary conditions. Influences of the magnetic field, boundary conditions, electric voltage, and core thickness on the eigenfrequency of the FG sandwich piezoelectric plate are illustrated. It is found that considering the effect of the magnetic field on the smart devices increases their vibrations, which may lead to an increment in the energy harvested from them. Further, when the magnetic field is applied along the length of the rectangular plate, the vibrations are reduced and vice versa.

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“…Using first-order shear deformation theory (FSDT), Afshari [36,37] presented semi-analytical solutions for GPLreinforced non-rotating and rotating truncated conical shells. Arshid et al [38] studied the free vibrational characteristics of rectangular sandwich microplates consisted of a honeycomb core and two GPL-reinforced composite face sheets. They presented a parametric study to investigate the effects of dimensional parameters of the GPLs and geometrical parameters of the honeycomb core on the natural frequencies.…”

Section: Introductionmentioning

confidence: 99%

Frequency response of rotating two-directional functionally graded GPL-reinforced conical shells on elastic foundation

Amirabadi

Farhatnia

Cívalek

2021

J Braz. Soc. Mech. Sci. Eng.

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In this article, a semi-analytical solution is provided to investigate the free vibration characteristics of rotating truncated conical shells surrounded by a Winkler-Pasternak type foundation. It is assumed that the material of the shell is composed of epoxy as matrix and graphene nanoplatelets (GPLs) as reinforcement dispersed in both thickness and length directions of the shell. The shell is modeled based on first-order shear deformation theory and the equivalent mechanical properties are evaluated using the rule of the mixture and the Halpin-Tsai model. The governing equations are derived by implementing Hamilton's principle incorporating centrifugal acceleration, Coriolis acceleration, and the initial hoop tension. Utilizing trigonometric functions, an analytical solution is presented to solve the governing equations in the circumferential direction and a numerical solution is provided in the longitudinal direction by utilizing differential quadrature method. The convergence and accuracy of the present results are examined with those available in the literature. A parametric study is provided to check the influences of boundary conditions, rotational speed, circumferential wave number, mass fraction and dispersion pattern of the GPLs, and Winkler and shear coefficients of the foundation on the natural frequencies of the shell. It is concluded that an increment in the mass fraction of the GPLs increases the natural frequencies and the GPLs scattering near the inner surface and the small radius of the shell have a higher reinforcing effect.

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Quasi-3D Hyperbolic Shear Deformation Theory for the Free Vibration Study of Honeycomb Microplates with Graphene Nanoplatelets-Reinforced Epoxy Skins

Cited by 30 publications

References 44 publications

The Effects of Hydrophobicity and Textural Properties on Hexamethyldisiloxane Adsorption in Reduced Graphene Oxide Aerogels

The Effects of Hydrophobicity and Textural Properties on Hexamethyldisiloxane Adsorption in Reduced Graphene Oxide Aerogels

Magnetic Control of Vibrational Behavior of Smart FG Sandwich Plates with Honeycomb Core via a Quasi‐3D Plate Theory

Frequency response of rotating two-directional functionally graded GPL-reinforced conical shells on elastic foundation

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