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• W4296337424 abstract "This paper studies the dynamic out-of-plane and in-plane responses of a viscoelastic plate made of functionally graded porous (FGP) materials in a closed-form solution under various combinations of boundary conditions. Firstly, the FGP parameters of the plate are considered to vary along the thickness direction based on distinct nonlinear porosity distributions. Secondly, the first-order shear deformation theory (FSDT) of elasticity, the energy technique, and the calculus of variations are employed to obtain the governing equations of motion. Thirdly, to account for structural damping, the derived equations are extended to constitutive equations using the standard linear solid (SLS) model. Finally, the system of partial differential equations with variable coefficients is analytically solved using the perturbation approach. To do so, the equations with variable coefficients are transformed into a system with constant coefficients by introducing a new parameter, and the lateral dynamic response is determined in a closed-form solution with no approximation. In addition to time-dependent transverse loads, namely transient and impulsive loads, different space-dependent load profiles of constant, linear, parabolic, and sine distributions are also applied on the plate surface. Furthermore, by inserting solution-dependent material properties, a user-defined field (USDFLD) code is provided to evaluate the accuracy of the analytical results in Abaqus/Standard analysis. Ultimately, the influence of different parameters on the dynamic behavior of viscoelastic FGP annular plates is investigated, including the inner-to-outer radius ratio, thickness-to-radius ratio, porosity coefficient, damping parameter, combination of boundary conditions, and porosity pattern. In light of the findings of this study, the asymmetric pattern has the highest vibration amplitude of the different distributions, while the symmetric distribution type 1 has the lowest. Furthermore, for all distributions, raising the void fraction increases the amplitude of vibrations for both transverse and in-plane responses. • Shear deformation theory is used to extract the governing equations of FGP annular plates with structural damping. • The effect of different combinations of boundary conditions on the lateral response is investigated. • Unlike prior studies, this study assumes that a combination of spatial and temporal loadings are applied concurrently. • A code namely USDFLD in the ABAQUS software is developed to examine the accuracy of the proposed analytical results. • The proposed framework has been benchmarked by examining the influence of various key parameters on the dynamic response of the VFGP plates." @default.
• W4296337424 created "2022-09-20" @default.
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• W4296337424 date "2022-11-01" @default.
• W4296337424 modified "2023-09-26" @default.
• W4296337424 title "On the dynamic response of viscoelastic functionally graded porous plates under various hybrid loadings" @default.
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• W4296337424 doi "https://doi.org/10.1016/j.oceaneng.2022.112541" @default.
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