Natural frequency investigation of graphene oxide powder nanocomposite cylindrical shells surrounded by Winkler/Pasternak/Kerr elastic foundations with a focus on various boundary conditions

Engineering Analysis with Boundary Elements, Journal Year: 2023, Volume and Issue: 149, P. 38 - 51

Published: Jan. 16, 2023

Language: Английский

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Various homogenisation schemes for vibration characteristics of axially FG core multilayered microbeams with metal foam face layers based on third order shear deformation theory

Applied Mathematical Modelling, Journal Year: 2023, Volume and Issue: 125, P. 189 - 217

Published: Aug. 30, 2023

This study assesses the significance of homogenisation models in theoretically analysing vibrations three-layered microbeams with a core composed axially functionally graded (AFG) material and upper lower face layers metal foam material, especially when third order shear deformation beam theory modified couple stress are used. The is assumed to vary following power gradation profile. range schemes, including Voigt model, Reuss Voigt-Reuss-Hill Tamura Mori-Tanaka bounds Hashin-Shtrikman, local representative volume element (LRVE) utilised approximate properties AFG core. foams modelled using closed-cell open-cell solid porosity models. coupled motion equations solved for natural frequencies system transverse, rotational axial directions. A software-based finite analysis (FEA) two simplified macrobeam systems was undertaken agreement between FEA numerical results, presented theoretical method, found be excellent. It has been confirmed that schemes have notable effect on mechanical core, hence translational-rotational motion's frequencies. largest difference different constant approximately 0.53. larger disparity methods seen an increase thickness microbeam's length-scale parameter multilayered porous microbeam. results this highlight scheme employed investigating microbeam layers.

Language: Английский

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Nonlinear Dynamics of Axially Functionally Graded, Porous Sandwich Panel Subjected to Periodic Non-uniform In-plane Excitation

Thin-Walled Structures, Journal Year: 2025, Volume and Issue: unknown, P. 113076 - 113076

Published: Feb. 1, 2025

Language: Английский

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Coupled five-parameter dynamics of Mindlin and third-order shear deformable FG graphene-platelets reinforced viscoelastic plates with geometric and material imperfections

Engineering Structures, Journal Year: 2023, Volume and Issue: 297, P. 116944 - 116944

Published: Oct. 14, 2023

The present work investigates the coupled five-parameter dynamics, in particular, structural resonance frequency, of functionally graded (FG) graphene-platelets reinforced viscoelastic plates presence geometric and material (porosity) imperfections, based on Mindlin theory third-order shear deformation plate (TSDPT). Various imperfections are often found structures as a result challenges manufacturing operations over time. Geometric imperfection is considered FG structure by modelling an initial curvature out-of-plane direction. Material form closed-cell voids, formulated uniform non-uniform porosity distributions. Uniform thickness-wise gradation effects accounted for determination effective properties using two-dimensional Halpin-Tsai micromechanics model, conjunction with rule mixtures. Viscoelasticity imperfect modelled employing Kelvin-Voigt model to consider energy dissipation. Using TSDPT, five equations motion, which through parameters u, v, w, ϕ1, ϕ2, derived Hamilton's variational principle. An assumed mode method then employed obtain real imaginary components frequencies. combined influences different examined. results obtained offer comprehensive understanding how graphene-platelets, porosity, thickness, imperfection, utilisation two theories collectively influence dynamics imperfections. It was that difference frequency resulted from use most dominant GX and/or PX porous plates, alter plate's sensitivity towards imperfection.

Language: Английский

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Vibration analysis of bio-inspired sandwich composite beam under rotating environment based on the Internet of Things technology

Mechanics Based Design of Structures and Machines, Journal Year: 2024, Volume and Issue: 52(11), P. 8569 - 8609

Published: March 5, 2024

Sandwich composite materials with corrugated cores are mostly used in industries like aircraft, marine construction, automobiles, and construction. constructions made for their lightweight, high strength, stiffness, also the sandwich core structures useful dynamic studies. A novel design inspired by a woodpecker beak microstructure creates fillet edge champer designs. This motivates us to achieve energy absorbing results starting free vibration studies followed rotating environment ASTM E1876 standards, non-destructive approach, determine material properties of carbon fiber-polylactic acid (CF-PLA) glass fiber reinforced polymer (GFRP), along alternative method (ADM) property evaluation. The hand lay-up technique is fabrication evaluated testing appropriate boundary conditions. Internet Things technology has been analyzing vibrations setup 250, 500, 750, 1000 rpm. It was observed that pattern more efficient natural frequency than pattern. Furthermore, parametric evaluations were performed various ply configurations numerical simulations Environment. Also, effective seen bioinspired structure achieves stiffness both rotational environments, despite conditions circumstances. Therefore, 3D printed particular GFRP factsheet orientation brings out novelty this research.

Language: Английский

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Nonlocal quasi-3d vibration/ analysis of three-layer nanoplate surrounded by Orthotropic Visco-Pasternak foundation by considering surface effects and neutral surface concept

Mechanics Based Design of Structures and Machines, Journal Year: 2024, Volume and Issue: 52(11), P. 9526 - 9561

Published: May 17, 2024

The present article deals with the application of refined plate theory and surface effects to investigate nonlocal free vibration behavior a functionally graded nano-plate composed two piezoelectric face sheets resting on Orthotropic Visco-Pasternak. Surface are applied using piezoelectricity stress-strain gradient theories. effects, quasi-3D higher-order theory, neutral position in-plane mechanical preloads considered study sandwich core in this for first time, simultaneously. size-dependent governing equations derived based 2D 3D Hamilton's principle different boundary conditions studied investigated according semi-analytical solution method. Comparing results models, local non-local also, examining foundations simultaneously can be said as one innovations current research. Finally, parametric is presented examine parameters such small scale parameters, preloads, thickness stretching position, non-homogeneous coefficient, voltage, foundation constants, conditions, geometrical ratios theories details. It indicated that inclusion leads significant influence three-layered nano-scale plates. may provide useful guidance design development next generation nano-devices.

Language: Английский

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Non-linear strain based FE model for free vibration analysis of stiffened functionally graded folded plates in hygrothermal environment

Mechanics Based Design of Structures and Machines, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 31

Published: Jan. 28, 2025

Language: Английский

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Free vibration behavior of a laminated polymer/GNP/fiber conical shell stiffened with several intermediate rings

Mechanics Based Design of Structures and Machines, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 24

Published: Feb. 1, 2025

Language: Английский

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Accelerating composite sandwich plate analysis: A hybrid higher-order XFEM and ANN approach for natural frequency prediction

Mechanics Based Design of Structures and Machines, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 13

Published: Jan. 24, 2025

Language: Английский

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Nondestructive method for predicting buckling loads of sandwich plates with functionally graded porous layers using particle swarm optimization and bagging technique (machine learning)

Mechanics Based Design of Structures and Machines, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 33

Published: April 16, 2025

Language: Английский

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