Mechanical metamaterials with negative Poisson’s ratio: A review

Engineering Structures, Год журнала: 2025, Номер 329, С. 119838 - 119838

Опубликована: Янв. 31, 2025

Язык: Английский

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Elastic waves in graphene origami-enabled auxetic metamaterial thickness-deformable doubly-curved shells

International Journal of Engineering Science, Год журнала: 2025, Номер 211, С. 104249 - 104249

Опубликована: Март 23, 2025

Язык: Английский

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On the nonlinear forced vibration of nanoshells via nonlocal strain gradient theory

International Journal of Engineering Science, Год журнала: 2025, Номер 211, С. 104257 - 104257

Опубликована: Март 27, 2025

Язык: Английский

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Recent advances in graphene origami-enabled auxetic metamaterial structures

Engineering Structures, Год журнала: 2025, Номер 333, С. 120203 - 120203

Опубликована: Март 31, 2025

Язык: Английский

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Tailoring asymmetry for anisotropic friction in kirigami metamaterial skins with pop-up folding hinges

International Journal of Mechanical Sciences, Год журнала: 2025, Номер unknown, С. 110258 - 110258

Опубликована: Апрель 1, 2025

Язык: Английский

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Negative electrical conductivity metamaterials and their properties

International Journal of Engineering Science, Год журнала: 2024, Номер 208, С. 104198 - 104198

Опубликована: Дек. 18, 2024

Язык: Английский

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Nonlinear buckling and free vibration analysis of auxetic graphene origami composite beams under nonuniform thermal environment

Mechanics Based Design of Structures and Machines, Год журнала: 2024, Номер unknown, С. 1 - 32

Опубликована: Окт. 24, 2024

This study examines the thermo-mechanical behavior of auxetic metamaterial beams enhanced by graphene origami (GOri) under spatially varying nonuniform temperature distributions (SVTD). Utilizing Timoshenko beam theory considering von-Kármánn type nonlinear strain–displacement relationship, GOri are modeled as layered structures. The Ritz method is employed to solve equilibrium equations, analyzing impact distribution patterns, content, and folding degree on post-buckling vibration paths. effects five SVTDs, three end conditions, patterns buckling, behavior, free characteristics explored. Findings reveal that parabolic with peak temperatures at ends (P-MAE) results in higher critical frequencies. research provides crucial insights into design optimization GOri-enabled structures complex thermal environments, highlighting significant influence along beam's length.

Язык: Английский

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Vibration response of sandwich plate reinforced by GPLs/GOAM

Mechanics Research Communications, Год журнала: 2024, Номер unknown, С. 104334 - 104334

Опубликована: Сен. 1, 2024

Язык: Английский

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Performance enhancement energy harvesting from aeroelastic vibrations using a van der Pol circuit

Mechanics Based Design of Structures and Machines, Год журнала: 2024, Номер 53(3), С. 2390 - 2402

Опубликована: Окт. 7, 2024

This paper explores galloping vibration-based electromagnetic energy harvesting (EH) in a Duffing-Rayleigh oscillator coupled to storage RLC resonator circuit with van der Pol model. Aeroelastic instability induces the mechanical system's self-induced vibration. The electromechanical coupling mechanism between resonant and structure is obtained by permanent interaction of magnet coil. We examine two cases comparative study. In first case, we use an without second case considers Firstly, modulation equations slow flow vibration output voltage responses are using complexification-averaging (CX-A) method. Furthermore, analytical approximate solutions steady-state derived. results have been confirmed numerical simulations. Results show that can provide higher electrical introducing instead circuit. Moreover, presence model significantly reduce critical wind speed required harvest energy. result may optimization process be used supply some guidelines design vibrations-based harvesters.

Язык: Английский

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Active vibration control of metal foam reinforced agglomerated graphene nanoplatelets nanocomposite truncated conical shells with piezoelectric layers

Mechanics Based Design of Structures and Machines, Год журнала: 2024, Номер unknown, С. 1 - 26

Опубликована: Окт. 15, 2024

This study examines active vibration control (AVC) in a truncated conical shell composed of metal foam reinforced with agglomerated graphene nanoplatelets and integrated piezoelectric layers functioning as sensors actuators. Both complete partial agglomeration states are considered based on the Eshelby–Mori–Tanaka approach, mechanical properties porous core characterized using closed-cell model. The governing equations motion derived Hamilton's principle, two-dimensional axisymmetric elasticity theory, solved through finite element method coupled Newmark method. Vibration mitigation is achieved fractional-order fuzzy proportional–integral–derivative (PID) controller. A comprehensive parametric conducted, examining effects geometric dimensions, various boundary conditions, reinforcement parameters (including weight fraction, distribution patterns, parameters), porosity pore size, pattern) shell. Numerical simulations performed to assess effectiveness proposed AVC system reducing structural vibrations compared constant velocity feedback approach. controller reduced central deflection from 12.65 5.089 μm, while PID further improved it 2.348 representing 53.86% enhancement over

Язык: Английский

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