The present work studies an axisymmetric rotating truncated cone made of functionally graded (FG) porous materials reinforced by graphene platelets (GPLs) under a thermal loading. problem is tackled theoretically based on classical linear thermoelasticity approach. consists layered material with uniform or non-uniform dispersion GPLs in metal matrix open-cell internal pores, whose effective properties are determined according to the extended rule mixture and modified Halpin–Tsai model. A...

AbstractIn the present research, torsional buckling response of thick truncated conical shell panels supporting on Winkler-type elastic medium has been surveyed. The is constructed from a porous metal material reinforced by graphene platelets (GPLs) in which porosity and volume weight fraction nanofillers are graded along thickness shell. Three functions for distribution five patterns GPLs examined. To estimate Young modulus shell, Tsai-Halpin micromechanical model, its mass density,...

Stress wave propagation and free vibration response of functionally graded graphene platelet (FG-GPL)-reinforced porous joined truncated conical–cylindrical-conical shell are investigated in this paper. The is constructed a metallic matrix reinforced by three types distribution GPLs open-cell interior pores. modified Halpin–Tsai estimation the generalized rule mixture employed to calculate effective mechanical properties structure. Three different distributions for porosity assumed along...

In this study, dynamic instability of a sandwich beam made an isotropic core and functionally graded (FG) graphene platelets-reinforced composite (GPLRC) face sheets is investigated for the first time. A Frostig theory soft third-order shear deformation (TSDT) are used. Hamilton’s principle used to derive governing equations motion, by applying Bolotin’s approach, regions (DIRs) investigated. comprehensive investigation conducted assess effects different weight fractions nanofiller, various...

AbstractThe present investigation has analyzed the buckling of bi-directional functionally graded conical micro-shells bearing axial loading. The dominant equations serve on basis theory first-order shear deformation in modified couple stress (MCST). Ritz technique is used so as to solve governing equations. Bi-directional material construct shell, and a predefined composition profile, volume fractions pertaining constituent materials constantly vary through edge directions thickness. model...

In this article, static, dynamic and natural frequency analyses of functionally graded porous annular sector plate reinforced by graphene nanoplatelets are investigated for the first time. The is a composition layered model with uniform or nonuniform dispersion platelets in metallic matrix including open-cell interior pores. extended rule mixture modified Halpin–Tsai models applied to estimate effective properties nanocomposite plate. Three different kinds porosity distributions considered...

In this work, a numerical 3D finite element method is developed to investigate the natural frequencies and static responses of saturated FG porous annular elliptical sector plate. elasticity theory utilized model problem. Three various porosity patterns are assumed along thickness direction such as nonlinear symmetric distribution (PNSD), nonsymmetric (PNND), uniform (PUD). Biot poroelasticity instead simple Hooke's law applied describe relation between stress strain. To derive governing...

The present work studies the buckling behavior of functionally graded (FG) porous rectangular plates subjected to different loading conditions. Three porosity distributions are assumed throughout thickness, namely, a nonlinear symmetric, asymmetric and uniform distribution. A novel approach is proposed here based on combination generalized differential quadrature (GDQ) method finite elements (FEs), labeled as FE-GDQ method, while assuming Biot’s constitutive law in lieu classical elasticity...

In this paper, natural frequency analysis of functionally graded graphene platelet (GPL) reinforced composite cylindrical panel is investigated. Halpin-Tsai equations are employed to obtain the mechanical properties structure. The linear three-dimensional elasticity theory based on Hamilton principle and numerical finite element method used for obtaining governing motion. Four patterns GPL distributions such as: FG-X, FG-V, FG-O UD assumed through thickness shell. effects various parameters...

The present work aims at investigating the hygrothermal effect on natural frequencies of functionally graded (FG) annular plates integrated with piezo-magneto-electro-elastic layers resting a Pasternak elastic foundation. formulation is based layer-wise (LW) theory, where Hamiltonian principle used to obtain governing equation problem involving temperature- and moisture-dependent material properties. differential quadrature method (DQM) applied here as numerical strategy solve equations for...

The present research aims at determining the axial buckling load of stiffened multilayer cylindrical shell panels made functionally graded graphene-reinforced composites (FG-GPL RCs). Rings and stringers are applied as stiffening tools for panels, whose elastic properties determined according to Halpin–Tsai relations. virtual work principle finite element approach implemented here, a first-order shear deformation theory (FSDT) Lekhnitskii smeared stiffener approach, in order determine...

In this paper, the vibration and primary resonance of electrostatically actuated microbridges are investigated, with effects electrostatic actuation, axial stress, mid-plane stretching considered. Galerkin's decomposition method is adopted to convert governing nonlinear partial differential equation a ordinary equation. The homotopy perturbation (a special case analysis method) then employed find analytic expressions for natural frequencies predeformed microbridges, by which voltage,...

In this article, static response of functionally graded saturated porous rotating truncated cone is investigated for the first time. Three different patterns are considered porosity distribution along with thickness cone, which symmetric nonlinear, nonlinear asymmetric and uniform distributions. The relationship between stress strain based on Biot constitutive law instead simple Hook's law. 2D axisymmetric elasticity theory finite element method Rayleigh-Ritz energy formulation used to model...

In this paper, natural frequencies and dynamic response of thick beams made saturated porous materials resting on viscoelastic foundation are investigated for the first time. The beam is modeled using higher-order theory. Kelvin-voight model used to foundation. Distribution porosity along thickness considered in two different patterns, which symmetric nonlinear asymmetric distributions. relationship between stress strain based Biot constitutive law. Lagrange equations express motion...

In this paper, the free vibration response of a stiffened functionally graded graphene nanoplatelet (GPL)-reinforced composite multilayer cylindrical shell panel is studied for first time. The by both stringers and rings. Additionally, effect reinforcing panel, ring stinger with GPLs independently studied. Halpin–Tsai relations are employed to evaluate mechanical properties rings stringers. first-order shear deformation theory, accompanied Lekhnitsky smeared stiffener model, using numerical...

In this research, natural frequency response of functionally-graded multilayer graphene-reinforced composite plate with circular cutout reinforced by orthogonal stiffeners is investigated for the first time. The structure surrounded Winkler-type elastic support. composed polymethyl methacrylate (PMMA) as matrix material and graphene platelets (GPLs). same that matrix. Rule mixtures Halpin–Tsai approach are applied to estimate effective properties plate. Third-order shear deformation theory...

In the current research, authors have attempted to improve mechanical properties and creep behavior of magnesium alloy Mg–9Al–1Zn (AZ91) in three different stress levels. To this end, present study investigated experimentally addition effects values yttrium oxide nanoparticles AZ91. regard, weight percentages 0.5%, 1%, 1.5%, 2% were added material using vortex casting method. Then, various test specimens fabricated based on ASTM standards by utilizing a Computer Numerical Control lathe...