Mechanical metamaterials for full-band mechanical wave shielding

Wu, Lingling; Wang, Yong; Zhai, Zirui; Yang, Yi; Krishnaraju, Deepakshyam; Lu, Junqiang; Wu, Fugen; Wang, Qianxuan; Jiang, Hanqing

doi:10.1016/j.apmt.2020.100671

Cited by 44 publications

(22 citation statements)

References 45 publications

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“…When the platform moves down, the input energy Winput will be stored in the springs while it will be released to the load when moving up, two types of energy will always be equal. This phenomenon is similar with the full-band mechanical metamaterials mentioned in work [38], which is called an "energy circulation." Fig.…”

Section: Stiffness Analysissupporting

confidence: 67%

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Theoretical design on the characteristics of a hexagon quasi- zero stiffness vibration isolator

Zhou

2022

Preprint

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A novel hexagon quasi-zero stiffness (QZS) platform using link-spring mechanism is proposed with load adjustable to seek for low-frequency vibration isolation. First, the key static characteristics, such as the elastic potential energy, restoring force and effective stiffness are obtained by mechanical modeling for different configurations of the platform. It indicates that the proposed structure could achieve dynamic zero stiffness for different designed loading capacity, even a full band vibration isolation. Then, the nonlinear properties of inertia, stiffness and damping are systematically studied and it is proven to be beneficial for dynamic stabilization and vibration isolation. An analytical expression for the effective stiffness is derived to obtain parameter condition for QZS characteristic. Finally, the displacement transmissibility of the structure is solved by the harmonic balance method. The results demonstrate that the hexagon QZS vibration isolator has low and tunable frequency for vibration isolation and outperforms the linear isolators. Comparing to the classical QZS vibration isolator, the proposed one has a wider zero stiffness plateau and the starting frequency of vibration isolation can be as low as 1/4 that of the classical one. Consequently, the hexagon QZS isolator should be a feasible design for vibration isolation in ultralow frequency range.

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Section: Stiffness Analysissupporting

confidence: 67%

“…However, an experiment with another similar zero stiffness structure has been used to verify the vibration isolation performance [38].…”

mentioning

confidence: 99%

Theoretical design on the characteristics of a hexagon quasi- zero stiffness vibration isolator

Zhou

2022

Preprint

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“…In recent decades, mechanical metamaterials have been considered an ideal medium to design effective wave manipulation systems, leveraging their high degree of freedom in design and the tailorability of their mechanical properties [1][2][3]. Mechanical metamaterials are primarily highlighted for their unconventional dynamic responses that can offer rich applications, including vibration isolation [4][5][6][7][8][9], wave guiding [10][11][12][13], and energy harvesting [6,14,15]. More recently, the discovery of the topological insulators has significantly influenced and extended the design of wave-guiding mechanical metamaterials [16,17].…”

Section: Introductionmentioning

confidence: 99%

Topological state transfer in Kresling origami

Miyazawa¹,

Chen²,

Chaunsali³

et al. 2022

Preprint

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Topological mechanical metamaterials have been widely explored for their boundary states, which can be robustly isolated or transported in a controlled manner. However, such systems often require pre-configured design or complex active actuation for wave manipulation. Here, we present the possibility of in-situ transfer of topological boundary modes by leveraging the reconfigurability intrinsic in twisted origami lattices. In particular, we employ a dimer Kresling origami system consisting of unit cells with opposite chirality, which couples longitudinal and rotational degrees of freedom in elastic waves. The quasi-static twist imposed on the lattice alters the strain landscape of the lattice, thus significantly affecting the wave dispersion relations and the topology of the underling bands. This in turn facilitates an efficient topological state transfer from one edge to the other. This simple and practical approach of energy transfer in origami-inspired lattices can thus inspire a new class of efficient energy manipulation devices.

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“…As the periodicity of the metamaterial or the local resonance unit is comparable to the wavelength of elastic waves, the bandgaps due to the Bragg Scattering mechanism and Local Resonance mechanism arise [8][9][10]. The concept of metamaterials provides novel ideas and methods to the research and applications in wave guiding [11], filtering [12], cloaking [13,14], bandgaps [15][16][17][18], and energy harvesting [19]. Moreover, this fundamental property offers a variety of promising applications in the isolation of vibration and shock waves for a lot of precision equipment and engineering structures [20].…”

Section: Introductionmentioning

confidence: 99%

“…Zhang et al reported a type of tailored Mechanical metamaterial with programmable quasi-zero-stiffness features for full-band vibration isolation [22]. Wu et al proposed a kind of mechanical metamaterials, which can circulate the energy between the metamaterial and the energy source, without passing energy to the payload [14]. Very recently, acoustic black holes (ABHs) have been used as micro-structures for constructing metamaterials for wave control and vibration isolation [23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Ultra-Wide Bandgap in Two-Dimensional Metamaterial Embedded with Acoustic Black Hole Structures

Lyu

Ding

et al. 2021

Applied Sciences

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This paper reports a type of metamaterial plate enabling in-plane ultra-wide vibration isolation in engineering equipment development. It is composed of periodic hexagonal lattice structures. The acoustic black hole (ABH) structures are embedded in each cell wall of the conventional hexagonal lattice, which results in the reduction of local stiffness in the cell wall and the local mass in the hexagonal corner. The lattice can be simplified as the form of lumped masses vibrating on springs, and two types of eigenstates can be obtained: the rotational eigenstates and the transverse eigenstates. The geometric nonlinearity of the ABH structure leads to unevenly distributed vibration modes, resulting in the ultra-wide bandgap. Experimental results prove the effective attenuation capacity. Compared with the traditional hexagonal lattice, the proposed design provides greater advantages in practical application.

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Mechanical metamaterials for full-band mechanical wave shielding

Cited by 44 publications

References 45 publications

Theoretical design on the characteristics of a hexagon quasi- zero stiffness vibration isolator

Theoretical design on the characteristics of a hexagon quasi- zero stiffness vibration isolator

Topological state transfer in Kresling origami

Ultra-Wide Bandgap in Two-Dimensional Metamaterial Embedded with Acoustic Black Hole Structures

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