Journal of Vibration Engineering & Technologies, Год журнала: 2024, Номер unknown
Опубликована: Май 1, 2024
Язык: Английский
Polymer Composites, Год журнала: 2025, Номер unknown
Опубликована: Фев. 28, 2025
Abstract Functionally graded composite doubly‐curved shells with embedded polymeric viscoelastic core possess significant potential for application across various fields, including spacecraft engineering, automotive chassis design, and the structural components of medical equipment. In this paper, based on complex modulus theory Rayleigh‐Ritz method, governing differential equations structure are established solved by an efficient method. The results compared those published literature, validity theoretical model is verified. dynamic characteristics functional gradient spherical shell, hyperbolic shell elliptical damping membrane analyzed using verified model. research conclusion furnishes underpinning design structure. Highlights An analytical was developed predicting characteristics; confirmed; Effects parameters were conducted.
Язык: Английский
Процитировано
0
Mathematics, Год журнала: 2025, Номер 13(9), С. 1518 - 1518
Опубликована: Май 5, 2025
Dynamic post-buckling behavior of microscale cylindrical shells reinforced with functionally graded carbon nanotubes (FG-CNTs) and conveying microfluid is discussed for the first time. The microshell embedded in a Kerr foundation subjected to an axial compressive load two-dimensional magnetic field effect. CNTs dispersion across shell thickness follows power law, five distribution types developed. modified couple stress theory applied incorporate small-size effect using single material parameter. Furthermore, Knudsen number used address on microfluid. external force between fluid modeled by applying Navier–Stokes equation depending velocity. Nonlinear motion equations present model are derived Hamilton’s principle, containing Lorentz force. According Galerkin method, transformed into algebraic system be solved, determining paths. Numerical results indicate that presence field, CNT reinforcement, flow improves load-bearing performance microshells. Also, many new parametric effects curves FG-CNT microshells have been discovered, including geometry, direction, length scale parameter, number, types.
Язык: Английский
Процитировано
0
Archives of Civil and Mechanical Engineering, Год журнала: 2025, Номер 25(4)
Опубликована: Май 22, 2025
Язык: Английский
Процитировано
0
Proceedings of the Royal Society A Mathematical Physical and Engineering Sciences, Год журнала: 2025, Номер 481(2314)
Опубликована: Май 1, 2025
The primary objective of this paper is to investigate the vibration and transient response bi-directional functionally graded graphene platelet (2DFG-GPL) reinforced plates resting on a Kerr foundation (KF). To achieve this, finite-element procedure based refined higher-order shear deformation theory (r-HSDT) developed using four-node rectangular (Q4) element with eight degrees freedom (DOFs) per node. This approach combines Lagrange functions Hermite polynomials transform C1 continuity into C0 by introducing additional displacement variables. solve problem, computational program implemented in M atlab Newmark-β method. accuracy efficiency proposed method are validated comparing results those available existing literature. Furthermore, detailed parametric study conducted analyse effects geometric parameters, material properties boundary conditions (BCs) 2DFG-GPL KF.
Язык: Английский
Процитировано
0
Symmetry, Год журнала: 2024, Номер 16(6), С. 696 - 696
Опубликована: Июнь 5, 2024
Based on the differential quadrature procedure (DQP), vibrational response of functionally graded (FG) sandwich annular plates enhanced with graphene platelets (GPLs) and an FG porous core is illustrated in this paper. The current plate assumed to deform axisymmetrically expose a radial magnetic field. Lorentz body force deduced via Maxwell’s relations. effective physical properties upper lower layers are obtained by employing Halpin–Tsai model. Our technique depends new four-unknown shear deformation theory depict displacements. In addition, motion equations established Hamilton’s principle. solved DQP. order study convergence DQ method, minimum number grid points needed for converged solution ascertained. theory’s outcomes compared those previous higher-order theories. effects porosity distribution type, factor, GPLs pattern, weight fraction, inner-to-outer radius ratio, outer radius-to-thickness field parameters, thickness, elastic substrate parameters nondimensional vibration frequencies discussed.
Язык: Английский
Процитировано
2
Mechanics Based Design of Structures and Machines, Год журнала: 2024, Номер unknown, С. 1 - 22
Опубликована: Июль 30, 2024
The purpose of this study is to analyze the influence geometric parameters and material properties on free forced vibration bi-directional functionally graded sandwich (2D-FGSW) plates lying an elastic foundation (EF) using effective finite element method (FEM) based trigonometric shear deformation theory (TrSDT). mechanical 2D-FGSW are variable in both x- z-directions. EF includes springer stiffness k1 layer k2. Moreover, impacts structural damping periodic loading behavior considered. Element matrices created a four-node quadrilateral plate (Q4) with eight degrees freedom per node. effectiveness accuracy current formulation confirmed by contrasting acquired results those earlier works. Then, many studies carried out illustrate how input might affect characteristics EF. In addition, eigenfrequencies different types center hole investigated.
Язык: Английский
Процитировано
1
Journal of Composite Materials, Год журнала: 2024, Номер unknown
Опубликована: Ноя. 29, 2024
The incorporation of carbon nanotubes (CNT) into a polymer matrix has opened up exciting possibilities for creating Nano-composite materials with exceptional mechanical properties. In this study, the buckling behavior reinforced plate mixed CNTs is investigated. Various factors, such as plate’s shape and elastic base, are examined their effects on behavior. investigation grounded in scientific rigor, drawing upon several theories that address Specifically, high-order theory, which accounts transverse shear parabolic distribution stresses across thickness, employed. By analyzing critical load, interaction between different types within medium explored. model’s governing equations, derived from Hamilton’s principle, allow prediction loads associated axial compression buckling. Notably, it found distribution, coupled Winkler—Pasternak foundation, renders less flexible compared to scenarios without an foundation. This insight leads crucial enhancement load. significance incorporating matrices achieve nanocomposite properties underscored. foundation study rests provides valuable insights designing robust efficient structures.
Язык: Английский
Процитировано
1
Journal of Vibration Engineering & Technologies, Год журнала: 2024, Номер unknown
Опубликована: Май 1, 2024
Язык: Английский
Процитировано
0