A Matryoshka-like seismic metamaterial with wide band-gap characteristics

Zeng, Yi; Xu, Yuebin; Yang, Hongwu; Muzamil, Muhammad; Xu, Rui; Deng, Keke; Peng, Pai; Du, Qiujiao

doi:10.1016/j.ijsolstr.2019.08.032

Cited by 61 publications

(31 citation statements)

References 35 publications

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“…The coming into existence of metamaterials has encouraged researchers and scientists in the area of electromagnetic theory in relation to radiation and propagation phenomena towards the design and fabrication of devices for various applications such as couplers, phase‐shifters, imaging systems, radar, satellite, seismic protection, absorbers, lens, filters, sensors, electromagnetic cloaks, and antennas …”

Section: Application Areas Of Metamaterials and Metasurfacementioning

confidence: 99%

Application of metamaterials for performance enhancement of planar antennas: A review

Tadesse

Acharya

Sahu

2020

Int J RF Microw Comput Aided Eng

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Metamaterials are assemblies of metallic and/or dielectric materials with properties that are not readily found in naturally existing materials. Hence, metamaterial structures are commonly loaded on/near the patch, embedded in the substrate, loaded/etched from the ground plane or placed as a superstrate layer for enhancing bandwidth and gain, and size miniaturization of conventional patch antennas. The demand for wide bandwidth, high gain, and compact antennas is highly contemplated in recent wireless communication research studies. Despite their lightweight, ease of fabrication, low profile, and simplicity for integration, patch antennas have performance limitations as result of their narrow bandwidth, lower gain, larger size, and lower power handling capacity. To address these problems, metamaterial‐based antennas have gained massive interest. There exist inadequate literatures about review of current state of extensive study reports on metamaterial application for patch antenna performance enhancement. Thus, this paper has reviewed and discussed latest research works on metamaterial applications for performance enhancement of planar patch antennas.

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Section: Application Areas Of Metamaterials and Metasurfacementioning

confidence: 99%

Application of metamaterials for performance enhancement of planar antennas: A review

Tadesse

Acharya

Sahu

2020

Int J RF Microw Comput Aided Eng

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“…Metamaterials have the capability of manipulating a desired range of frequency components in the propagating wave, an aspect that has been extensively used in electromagnetics, optics, and micro and nano-scale mechanics (Guenneau et al, 2007;Craster and Guenneau, 2012;Watts et al, 2012;Poddubny et al, 2013;Yang et al, 2016;Brûlé et al, 2017bBrûlé et al, , 2018bColombi et al, 2017;Casablanca et al, 2018;Kadic et al, 2019;Zeng et al, 2020). However, their large scale extension, which can be extremely useful in solving many of the important engineering problems, mentioned above, requires development.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Clamping, Structure Geometry, and Material on Seismic Metamaterial Performance

et al. 2021

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Diverting and controlling the impact of elastic vibrations upon an infrastructure is a major challenge for seismic hazard mitigation and for the reduction of machine noise and vehicle vibration in the urban environment. Seismic metamaterials (SMs), with their inherent ability to manipulate wave propagation, provide a key route for overcoming the technological hurdles involved in this challenge. Engineering the structure of the SM serves as a basis to tune and enhance its functionality, and inspired by split rings, swiss-rolls, notch-shaped, and labyrinthine designs of elementary cells in electromagnetic and mechanical metamaterials, we investigate altering the structure geometries of SMs with the aim of creating large bandgaps in a subwavelength regime. Interestingly, clamping an SM to the bedrock creates a zero frequency stopband, but further effects can be observed in the higher frequency regime due to their specific geometry. We show that square stiff inclusions perform better in comparison to circular ones while keeping the same filling fraction. En route to enhancing the bandgap, we have also studied the performance of SMs with different constituent materials; we find that steel columns, as inclusions, show large bandgaps, however, the columns are too large for steel to be a feasible material in practical or financial terms. Non-reinforced concrete would be preferable for industry level scaling up of the technology because, concrete is cost-effective, easy to cast directly at the construction site and easy to provide arbitrary geometry of the structure. As a part of this study, we show that concrete columns can also be designed to exhibit bandgaps if we cast them within a soft soil coating surrounding the protected area for various civil structures like a bridge, building, oil pipelines, etc. Although our motivation is for ground vibration, and we use the frequencies, lengthscales, and material properties relevant for that application, it is notable that we use the equations of linear elasticity, and our investigation is more broadly relevant in solid mechanics.

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“…13 Therefore, various pillars placed on the ground have been extensively studied and experimentally verified. [14][15][16][17] It is worth mentioning that the use of Matryoshka-like structures, 18 fractal structures 19,20 and "rainbow trapping effect" 4 can realize the attenuation of seismic surface waves over a wider range of frequency. Among them, Miniaci et al 20 demonstrated the possibility of lowering BGs in elastic systems by introducing self-similar structures at multiple scales experimentally.…”

Section: Introductionmentioning

confidence: 99%

Subwavelength seismic metamaterial with an ultra-low frequency bandgap

Zeng

Peng

et al. 2020

Journal of Applied Physics

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A subwavelength seismic metamaterial (SMs) consisting of a three-component SM plate (SMP) and a half space is proposed to attenuate ultra-low frequency seismic surface waves. The design concept and models are verified firstly by lab-scale experiments on the SM consisting of a two-component SMP and a half space. Then we calculate the band structures of the one-dimensional and two-dimensional subwavelength SMs, and evaluate their ability to attenuate Rayleigh waves. A wide ultra-low frequency band gap can be found. And the Rayleigh waves are deflected by the subwavelength SM and converted into bulk waves in the frequency range of this band gap. When the number of the unit cells of the subwavelength SM is sufficient, the transmission distance and deflection angle of the Rayleigh waves are constant at the same frequency. This discovery is expected to open up the possibility of pragmatic 2 seismic protection for large nuclear power plants, ancient buildings and metropolitan areas.

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A Matryoshka-like seismic metamaterial with wide band-gap characteristics

Cited by 61 publications

References 35 publications

Application of metamaterials for performance enhancement of planar antennas: A review

Application of metamaterials for performance enhancement of planar antennas: A review

The Influence of Clamping, Structure Geometry, and Material on Seismic Metamaterial Performance

Subwavelength seismic metamaterial with an ultra-low frequency bandgap

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