Free vibration and buckling analysis of FG graphene origami-enabled auxetic metamaterial beams in a thermal environment

Acta Mechanica, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

Language: Английский

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A modified strain gradient theory for buckling, bending and free vibration behaviors of metal foam microbeams

Structures, Journal Year: 2024, Volume and Issue: 64, P. 106533 - 106533

Published: May 17, 2024

Language: Английский

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A Ritz-type solution for free vibration and buckling analysis of functionally graded beams under hygro-thermal environment

Structures, Journal Year: 2025, Volume and Issue: 73, P. 108392 - 108392

Published: Feb. 12, 2025

Language: Английский

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Nonlinear aeroelastic modelling and analysis of a geometrically nonlinear wing with combined unsteady sectional and lifting line aerodynamics

Nonlinear Dynamics, Journal Year: 2025, Volume and Issue: 113(12), P. 14657 - 14693

Published: Feb. 18, 2025

This research develops a novel geometrically nonlinear aeroelastic model of cantilevered flexible wing capable capturing unsteady aerodynamics with finite span effects. The structural is developed using Chebyshev-Ritz approach the ONERA aerodynamic formulation coupled to three-dimensional analysis based on lifting line approach. resulting system describing evolution generalised coordinates and states formulated as continuous state space model. validated against experimental results from wind tunnel testing highly demonstrator at University Bristol. numerical are computed by applying continuation procedure, exercising benefits formulation. extensive numerical-experimental comparative includes bifurcation characteristics behaviour modes. reflected experimentally identified behaviour. predicted variations flutter onset speed root pitch angles were found be within 5% values. also correctly captured post-flutter Limit Cycle Oscillation (LCO). work further showed that speeds sensitive semi-empirical coefficients present in Consequently, calibration was airspeed-driven eigenvalue variations. necessitated influence application-specific conditions (e.g., Reynolds number) characteristics. Despite this limitation, tuned agreed observations across wide range test conditions. approaches presented can benefit multiple applications during wings, such causes influencing critical phenomena or design control laws.

Language: Английский

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Chebyshev polynomial-based Ritz method for thermal buckling and free vibration behaviors of metal foam beams

Applied Mathematics and Mechanics, Journal Year: 2024, Volume and Issue: 45(5), P. 891 - 910

Published: April 29, 2024

Language: Английский

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Static bending analysis of BDFG nanobeams by nonlocal couple stress theory and nonlocal strain gradient theory

Forces in Mechanics, Journal Year: 2024, Volume and Issue: unknown, P. 100289 - 100289

Published: Sept. 1, 2024

Language: Английский

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A Higher-Order Shear Deformation Theory and Modified Couple Stress Theory for Size-Dependent Analysis of Porous Microbeams Resting on a Foundation

International Journal of Structural Stability and Dynamics, Journal Year: 2023, Volume and Issue: 24(16)

Published: Oct. 6, 2023

This paper presents a novel shear deformation theory for analyzing porous microbeams’ bending, buckling, and free vibration resting on foundation. The proposed function incorporating three kinetic variables satisfies zero-traction boundary conditions the top bottom surfaces of beams does not require correction factor. modified couple stress accounts size-dependent effects, governing equations are derived from Lagrange’s equation using function. Legendre–Ritz functions developed to analyze vibration, bending behaviors. effects material length scale parameter, porosity, span-to-height ratio, condition, foundation parameter mechanical responses investigated. Numerical results demonstrate accuracy efficiency can serve as benchmarks future analysis microbeams elastic foundations.

Language: Английский

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State-Space Formulation for Buckling and Free Vibration of Axially Functionally Graded Graphene Reinforced Nanocomposite Microbeam under Axially Varying Loads

Materials, Journal Year: 2024, Volume and Issue: 17(6), P. 1296 - 1296

Published: March 11, 2024

This paper focuses on the size-dependent free vibration and buckling behaviors of axially functionally graded (AFG) graphene platelets (GPLs) reinforced nanocomposite microbeams subjected to varying loads (AVLs). With various axial grading patterns, GPL nano-reinforcements are distributed throughout polymer matrix against microbeam length, improved Halpin–Tsai micromechanics model rule mixture adopted evaluate effective material properties. Eigenvalue equations governing static stability derived based modified couple stress Euler–Bernoulli beam theory via state-space method, analytically solved with discrete equilong segment model. The effects distribution weight fraction, geometric parameters GPLs, as well different types AVLs, load natural frequency scrutinized in detail. results show that synchronized distributions GPLs AVLs could improve resistance more powerfully.

Language: Английский

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Dynamic augmentation of geometrically nonlinear beams via guided axially elastic tendons

Mechanical Systems and Signal Processing, Journal Year: 2024, Volume and Issue: 224, P. 112096 - 112096

Published: Nov. 1, 2024

Language: Английский

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Lateral torsional stability of porous thin-walled I-beams with nonuniform porosity distributions subjected to a uniformly distributed load

Acta Mechanica, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 12, 2024

Language: Английский

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