Widely tunable magnetorheological metamaterials with nonlinear amplification mechanism

Xue, Yu; Li, Jinqiang; Wang, Yu; Song, Zhiguang; Krushynska, Anastasiia O.

doi:10.1016/j.ijmecsci.2023.108830

Cited by 30 publications

(3 citation statements)

References 80 publications

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“…However, traditional linear local oscillators face challenges in reconciling low dynamic stiffness with high static stiffness. To address this, some researchers have explored lowfrequency nonlinear vibration isolation based on quasi-zero stiffness vibration isolation technology [13], which encompasses the 'three-spring' [14,15], electromagnetic [16,17], and bionic [18,19] methodologies.…”

Section: Introductionmentioning

confidence: 99%

A novel frog-like meta-structure with linkage mechanism for low-frequency vibration isolation

Li,

Wang,

Chai

et al. 2024

J. Phys. D: Appl. Phys.

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Structures with linkage mechanism, which could be widely seen in engineering, usually need to bear a certain load and exhibit ideal vibration isolation performance. One of the key factors affecting the mechanical and vibration properties is the connection behavior of the linkage mechanism. To clarify its influence on the vibration characteristics, a novel frog-like meta-structure by introducing a linkage mechanism into the conventional locally resonant metamaterial with a mass-spring resonator is proposed in the present paper, in which the linkage connection is considered as three types of hinged, fixed and elastic, respectively. The equivalent dynamic model of the meta-structure is established theoretically to calculate the effective material properties, which is then validated numerically through band gap and vibration analysis. The results show that the hinged linkage offers equivalent mass and free vertical displacement, while the fixed linkage provides supporting stiffness, shifting the band gap towards higher frequencies. An appropriate elastic connection can enhance the “spring-vibrator” effect, which in turn can significantly expand the low-frequency vibration suppression range of the structure. Experiments are also conducted corresponding to the different linkage mechanisms, and the dynamic model is verified. This study could provide a new idea for promoting the application of the locally resonant meta-structure with a linkage mechanism in the field of low-frequency vibration isolation.

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Section: Introductionmentioning

confidence: 99%

A novel frog-like meta-structure with linkage mechanism for low-frequency vibration isolation

Li,

Wang,

Chai

et al. 2024

J. Phys. D: Appl. Phys.

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“…The exploration of advanced composite materials with lightweight attributes has gained considerable attention 1–5 . One noteworthy development in this realm is the carbon fiber composite grid sandwich structure, a novel category of lightweight composite sandwich structures.…”

Section: Introductionmentioning

confidence: 99%

High‐velocity impact resistance of the carbon fiber composite grid sandwich structures

Wei,

Guo,

Niu

et al. 2024

Polymer Composites

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The carbon fiber composite grid sandwich structure represents an innovative category of lightweight composite sandwich structures, showcasing remarkable attributes including reduced weight, high‐specific strength, exceptional specific stiffness, and robust design flexibility. Using ABAQUS, the high‐velocity impact performance of carbon fiber composite grid sandwich structure is numerically simulated. This study delved into examining the impact patterns arising from various factors, including the equivalent density, height, and geometric configuration of the core layer. Additionally, the effects of the impact punch's initial velocity, size, and impact position on the high‐speed impact resistance performance of the carbon fiber composite grid sandwich structure were explored. The fracture absorption work of the structure and the kinetic energy attenuation rate of the impact punch are positively correlated with the equivalent density, height of the structural core layer, as well as the initial velocity and dimensions of the impact punch. Notably, the square carbon fiber composite grid sandwich structure was most significantly influenced by the equivalent density of the core layer, while the mixed carbon fiber composite grid sandwich structure was most sensitive to variations in core layer height and punch size. When impacted at the intersection of the ribs, compared with the central position between the two ribs, the structure shows enhanced fracture absorption energy and greater impact kinetic energy attenuation rate.Highlights The structure was modeled based on the interlocking assembly process. The high‐velocity impact resistance of the structure was studied. Different structural parameters were designed for the core layer to study. The initial velocity, size and impact position of the punch were involved.

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“…Resonators, ranging from simple to complex shapes, have been extensively studied, showing that diverse shapes can generate unique bandgap features, offering enhanced control over acoustic wave propagation. Additionally, researchers have explored the impact of nonlinear effects on shape and band-gap frequencies, potentially leading to adaptive materials adjusting their band gaps in response to external conditions [40]. The practical applications of this research, particularly in noise reduction, vibration control, and acoustic cloaking, aim to create materials with superior performance for effective noise mitigation, improved vibration damping, and adaptive acoustic devices [41].…”

Section: Introductionmentioning

confidence: 99%

Tunable multi-metamaterials intergrated with auxiliary magnetorheological resonators

Jafari,

Sedaghati

2023

Mater. Res. Express

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In recent years, there has been a surge in interest in utilizing multi-metamaterials for various purposes, such as vibration control, noise reduction, and wave manipulation. To enhance their performance and tunability, auxiliary resonators and magnetorheological elastomers (MREs) can be effectively integrated into these structures. This research aims to formulate the wave propagation analysis of periodic architected structures integrated with MRE-based auxiliary resonators. For this purpose, cantilever MRE beams are embedded into conventional unit cells of square and hexagonal shapes. Integrating MREs into multi-metamaterial structures allows for real-time tuning of the material properties, which enables the multi-metamaterial to adapt dynamically to changing conditions. The wave propagation in the proposed architected structures is analyzed using the finite element method and Bloch’s theorem. The studied low-frequency region is significant, and the addition of MRE resonators leads to the formation of a mixture of locally resonant and Bragg-type stop bands, whereas the basic structures (pure square and hexagonal) do not exhibit any specific band gaps in the considered region. The effect of different volume fractions and applied magnetic fields on the wave-attenuation performance is also analyzed. It is shown that band gaps depend on the material parameters of the resonators as well as the applied magnetic flux stimuli. Moreover, the area of band gaps changes, and their operating frequency increases by increasing the magnetic flux around the periodic structure, allowing for the tuning of wave propagation areas and filtering regions using external magnetic fields. The findings of this study could serve as a foundation for designing tunable elastic/acoustic metamaterials using MRE resonators that can filter waves in predefined frequency ranges.

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Widely tunable magnetorheological metamaterials with nonlinear amplification mechanism

Cited by 30 publications

References 80 publications

A novel frog-like meta-structure with linkage mechanism for low-frequency vibration isolation

A novel frog-like meta-structure with linkage mechanism for low-frequency vibration isolation

High‐velocity impact resistance of the carbon fiber composite grid sandwich structures

Tunable multi-metamaterials intergrated with auxiliary magnetorheological resonators

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