Free vibration behaviour of curved Miura-folded bio-inspired helicoidal laminated composite cylindrical shells using HSDT assisted by machine learning-based IGA

Composite Structures, Год журнала: 2025, Номер unknown, С. 118933 - 118933

Опубликована: Фев. 1, 2025

Язык: Английский

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High Load-Bearing Quasi-Zero Stiffness Metamaterials for Vibration Isolation

International Journal of Mechanical Sciences, Год журнала: 2025, Номер unknown, С. 110225 - 110225

Опубликована: Апрель 1, 2025

Язык: Английский

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Mechanical performance of negative-stiffness multistable bi-material composites

Acta Mechanica, Год журнала: 2024, Номер unknown

Опубликована: Дек. 23, 2024

Architected latticed structural systems, known as metamaterials or metastructures, have recently garnered significant attention due to their superior performance under various loading conditions. This class includes exhibiting multistability, characterized by negative stiffness, which enables energy entrapment during transitions between equilibrium states, making them suitable for applications such lightweight protective systems. In this study, in three folds, we investigate the mechanical of a stiffness honeycomb metamaterial (NSHM) with unit cells composed curved double beams. First, quasi-static compressive response is numerically examined using finite element method, revealing that independent number cells. Next, analyze transient dynamic both mono-material NSHMs and bi-material composites, where stiffeners are replaced brittle polystyrene, localized striker uniform plate impacts. Finally, present an analytical model total potential energy, solutions obtained through optimization technique, validate these results against numerical simulations. Through analyses, study effects several parameters influencing multistability. Our findings demonstrate bistability ratio significantly impacts overall honeycomb, desired can be achieved high ratios. Additionally, contact force peaks resulting from impact found constituent elements. The optimized geometry lattice determined trade-off porosity thicker cell walls.

Язык: Английский

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Research on Quasi-Zero Stiffness Vibration Isolation System of Buckled Flexural Leaf Spring Structure for Double Crystal Monochromator

Applied Sciences, Год журнала: 2025, Номер 15(6), С. 3024 - 3024

Опубликована: Март 11, 2025

The double crystal monochromator (DCM) is a spectrometer in synchrotron radiation beamlines, and its stability directly impacts the quality of emitted light. In order to meet requirements fourth generation light sources, researchers have designed DCM using an active control method ensure by actively compensating for displacement through voice coil motors. imposes high demands on vibration isolation performance frame. response external excitation characteristics, this paper proposes quasi-zero stiffness (QZS) system based compressed buckling beam structure. Random simulations finite element analysis revealed that, under different operating conditions, 3σ core part maintained at nanometer level. Moreover, presents calculation elastic potential energy establish force equilibrium equations negative analyzes stress distribution during derived deflection curve. Validation confirms method’s accuracy calculating distribution. Because structural similarities, some results can be applied study honeycomb materials.

Язык: Английский

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Design Methodology and Application Dynamics of Compact Quasi-Zero Stiffness Isolators

Applied Sciences, Год журнала: 2025, Номер 15(7), С. 3478 - 3478

Опубликована: Март 22, 2025

With the rapid development of precision instruments, aerospace, and automotive industries, demand for compact vibration isolators capable suppressing low-frequency vibrations has surged. Although prior reviews have established theoretical framework quasi-zero stiffness (QZS) isolators, critical gaps persist in addressing their design under strong nonlinear dynamics diverse engineering constraints. This review systematically analyzes dynamic characteristics QZS systems effects evaluates five innovative methodologies isolators: special spring type, magnetic bionic metamaterials-based origami-inspired type. Key findings reveal that spring-type are simple to space-efficient but difficult machine. Magnetic-type achieve ultra-low start-up frequencies face thermal instability. Metamaterial designs enable multifunctional integration at cost manufacturing complexity, while bionic-inspired abstract practical applications. We find current research tends prioritize miniaturization over synergistic optimization load capacity, broadband isolation, adaptability. Future should focus on multi-degree-of-freedom systems, coupled metamaterials-bionic structures, active control. work provides a key roadmap advancing technology space-constrained

Язык: Английский

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A stable horizontal 3-DOF vibration isolation system with adjustable stiffness: Theoretical analysis and experiment

Mechanical Systems and Signal Processing, Год журнала: 2025, Номер 230, С. 112631 - 112631

Опубликована: Март 29, 2025

Язык: Английский

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Morphing structural materials used in wind turbine blades

Renewable and Sustainable Energy Reviews, Год журнала: 2025, Номер 216, С. 115618 - 115618

Опубликована: Апрель 8, 2025

Язык: Английский

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Elasticity of origami-inspired honeycombs

International Journal of Mechanical Sciences, Год журнала: 2025, Номер unknown, С. 110231 - 110231

Опубликована: Апрель 1, 2025

Язык: Английский

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Inflatable design and deployment morphology of conical Kresling origami structures

Advances in Engineering Software, Год журнала: 2025, Номер 207, С. 103937 - 103937

Опубликована: Апрель 25, 2025

Язык: Английский

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Exploiting Weak Softening in Linear Spring for Improved Near Resonant Vibration Isolation in Pivoted Levered Mechanisms

Lecture notes in electrical engineering, Год журнала: 2025, Номер unknown, С. 577 - 592

Опубликована: Янв. 1, 2025

Язык: Английский

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