Resonance behavior of functionally graded polymer composite nanoplates reinforced with graphene nanoplatelets

Karami, Behrouz; Shahsavari, Davood; Janghorban, Maziar; Tounsi, Abdelouahed

doi:10.1016/j.ijmecsci.2019.03.036

Cited by 108 publications

(18 citation statements)

References 100 publications

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“…If the porosity volume fraction ζ → 0, it is inferred from Equations (11)(12)(13)(14)(15)(16)(17)(18) that, as k → 0 and k → ∞, the aforementioned material quantities approach the corresponding material quantities of pure ceramic and pure metal, respectively. In this work, the nano-beam material is assumed to be made of silicon nitride-stainless steel (Si3N4-SuS3O4), whose properties are listed in the following Table 1 [59,60].…”

Section: Functionally Graded Porous Materialsmentioning

confidence: 99%

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Nonlinear Dynamic Behavior of Porous and Imperfect Bernoulli-Euler Functionally Graded Nanobeams Resting on Winkler Elastic Foundation

Penna

Feo

2020

Technologies

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Nonlinear free vibrations of functionally graded porous Bernoulli–Euler nano-beams resting on an elastic foundation through a stress-driven nonlocal elasticity model are studied taking into account von Kármán type nonlinearity and initial geometric imperfection. By using the Galerkin method, the governing equations are reduced to a nonlinear ordinary differential equation. The closed form analytical solution of the nonlinear natural flexural frequency is then established using the Hamiltonian approach to nonlinear oscillators. Several comparisons with existing models in the literature are performed to validate the accuracy and reliability of the proposed approach. Finally, a numerical investigation is developed in order to analyze the effects of the gradient index coefficient, porosity volume fraction, initial geometric imperfection, and the Winkler elastic foundation coefficient, on the nonlinear flexural vibrations of metal–ceramic FG porous Bernoulli–Euler nano-beams.

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Section: Functionally Graded Porous Materialsmentioning

confidence: 99%

“…In most cases, functionally graded materials are made of a combination of metal and ceramic to offer a wide range of applications for various equipment subject to extreme thermo-mechanical stresses [5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Dynamic Behavior of Porous and Imperfect Bernoulli-Euler Functionally Graded Nanobeams Resting on Winkler Elastic Foundation

Penna

Feo

2020

Technologies

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“…A polymeric matrix with Young’s modulus E M = 3 GPa, density ρ M = 1200 kg/m 3 , and Poisson’s ratio ν M = 0.34 is modelled in this work; for the reinforcement process, the GNP is used supporting the Young modulus E GNP = 1.01 TPa, density ρ GNP = 1060 kg/m 3 and Poisson’s ratio ν GNP = 0.186. The whole thickness of the selected polymeric nanocomposite curved beam is h = 20 nm, with in-plane geometry of a = b =200 nm, which is made of GNPs with length l GNP = 3 nm, thickness h GNP = 7 nm, and width w GNP = 1.8 nm [ 61 ]. Moreover, the number of involved layers is considered 10, except when it is said.…”

Section: Numerical Examplesmentioning

confidence: 99%

Elastic Wave Characteristics of Graphene Reinforced Polymer Nanocomposite Curved Beams Including Thickness Stretching Effect

et al. 2020

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This work aims at analyzing elastic wave characteristics in a polymeric nanocomposite curved beam reinforced by graphene nanoplatelets (GNPs). GNPs are adopted as a nanofiller inside the matrix to enhance the effective properties, which are approximated through Halpin-Tasi model and a modified rule of mixture. A higher-order shear deformation theory accounting for thickness stretching and the general strain gradient model to have both nonlocality and strain gradient size-dependency phenomena are adopted to model the nanobeam. A virtual work of Hamilton statement is utilized to get the governing motion equations and is solved in conjunction with the harmonic solution procedure. A comparative study shows the effects of small-scale coefficients, opening angle, weight fraction, the total number of layers in GNPs, and wave numbers on the propagation of waves in reinforced nanocomposite curved beams. This work is also developed for two different distribution of GNPs in a polymeric matrix, namely uniformly distribution and functionally graded one.

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“…[27][28][29] The static deflection, free vibration, buckling, and dynamic responses of laminated composites, composite sandwich, functionally graded polymer composites reinforced with carbon nanotubes and nanoplatelets have been investigated using the aforementioned theories. [30][31][32][33][34][35][36] Now and then the effort has been made to predict the responses accurately with less computational cost with the adequate concurrence of real-time cases. The HSDT has proven its superiority (in maintaining the order of the inplane and out-of-plane shear stress and the corresponding strain) at various instances for the layered composite.…”

Section: Introductionmentioning

confidence: 99%

Multiphysical theoretical prediction and experimental verification of vibroacoustic responses of fruit fiber‐reinforced polymeric composite

2020

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The acoustic parameters (sound power level and radiation efficiency) of harmonically excited natural fiber (Luffa cylindrica) reinforced polymer composite panel is predicted first time using a coupled finite and boundary element scheme including the mechanical characteristics. First, the frequency values of the freely vibrating Luffa fiber-reinforced composite are obtained through a finite element solution considering the higher-order polynomial kinematic theory to count the structural deformation. Further, the Helmholtz wave equation is solved to evaluate the acoustic data under the harmonic excitation. The proposed multiphysics model is taking care of the structure, the fluid medium and the coupling between them, which, in turn, allows to obtain the solution numerically for the final finished polymer composite product. Further, the model accuracy has been shown by comparing both frequency and sound radiation responses with available published results including the own experimental values. Moreover, the fruit extracted fiber reinforced polymer composite plate components are fabricated using different volume fractions of fiber content and utilized for the numerical analysis considering their experimental properties (mechanical and physical). Finally, the influences of the dimensional variable (aspect ratio, side to thickness ratio and support condition) on the acoustic radiation behavior of the fabricated composite have been examined thoroughly to show their possible real-life applications.

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Resonance behavior of functionally graded polymer composite nanoplates reinforced with graphene nanoplatelets

Cited by 108 publications

References 100 publications

Nonlinear Dynamic Behavior of Porous and Imperfect Bernoulli-Euler Functionally Graded Nanobeams Resting on Winkler Elastic Foundation

Nonlinear Dynamic Behavior of Porous and Imperfect Bernoulli-Euler Functionally Graded Nanobeams Resting on Winkler Elastic Foundation

Elastic Wave Characteristics of Graphene Reinforced Polymer Nanocomposite Curved Beams Including Thickness Stretching Effect

Multiphysical theoretical prediction and experimental verification of vibroacoustic responses of fruit fiber‐reinforced polymeric composite

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