Tunable ultralow frequency wave attenuations in one-dimensional quasi-zero-stiffness metamaterial

Zhou, Jiaxi; Pan, Hongbin; Cai, Changqi; Xu, Daolin

doi:10.1007/s10999-020-09525-7

Cited by 57 publications

(23 citation statements)

References 43 publications

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“…ii) More importantly, by assembling the unit cell of the mechanical metamaterials, a basic building block that contains two identical tailored curved beams, programmable QZS features including both the QZS displacement range and the QZS payload can be achieved. This programming strategy has not been reported by previous works related to achieving QZS, [ 37–39 ] which report only a single QZS region. To emphasize these aspects, proof‐of‐principle experiments on 3D printed architectures are presented.…”

Section: Introductionmentioning

confidence: 91%

“…Here, we suggest and realize a class of tailored mechanical metamaterials containing many optimally designed curved beams; these beams are tailored in shape to achieve prescribed QZS characteristics, enabling the whole mechanical metamaterial to achieve programmable QZS features. The main innovations of this work lie in the following two aspects: i) The achieved QZS is originated from the tailored mechanical geometrical nonlinearities of monolithic compliant mechanism (here refers to the optimally designed curved beam) directly, [37][38][39] rather than counteracting the positive stiffness of an elastic element by another negative stiffness element, thus significantly reducing the complexity to achieve a QZS isolator. ii) More importantly, by assembling the unit cell of the mechanical metamaterials, a basic building block that contains two identical tailored curved beams, programmable QZS features including both the QZS displacement range and the QZS payload can be achieved.…”

Section: Introductionmentioning

confidence: 99%

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Tailored Mechanical Metamaterials with Programmable Quasi‐Zero‐Stiffness Features for Full‐Band Vibration Isolation

Zhang

Guo

2021

Adv Funct Materials

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Quasi‐zero‐stiffness (QZS) isolators of high‐static‐low‐dynamic stiffness play an important role in ultra‐low frequency vibration mitigation. While the current designs of QZS mainly exploit the combination of negative‐stiffness corrector and positive‐stiffness element, and only have a single QZS working range, here a class of tailored mechanical metamaterials with programmable QZS features is proposed. These programmed structures contain curved beams with geometries that are specifically designed to enable the prescribed QZS characteristics. When these metamaterials are compressed, the curved beams reach the prescribed QZS working range in sequence, thus enabling tailored stair‐stepping force‐displacement curves with multiple QZS working ranges. Compression tests demonstrate that a vast design space is achieved to program the QZS features of the metamaterials. Further vibration tests confirm the ultra‐low frequency vibration isolation capability of the proposed mechanical metamaterials. The mechanism of QZS stems solely from the structural geometry of the curved beams and is therefore materials‐independent. This design strategy opens a new avenue for innovating compact and scalable QZS isolators with multiple working ranges.

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Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Tailored Mechanical Metamaterials with Programmable Quasi‐Zero‐Stiffness Features for Full‐Band Vibration Isolation

Zhang

Guo

2021

Adv Funct Materials

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“…After an optimization of geometrical parameters, the multi-pieces of curved beams are able to produce a quasi-zero-stiffness characteristic. More importantly, the stiffness features of the integrated quasi-zero-stiffness resonator can be tuned easily by changing the deformation degree of the curved beams only, which provides a promising approach to tuning the low-frequency band gap [71][72] . In terms of the quasi-zero-stiffness resonator formed by connecting the positive stiffness mechanism and the negative stiffness mechanism, its stiffness features are related to the involvement level of the negative stiffness mechanism which is quantified by the stiffness ratio.…”

Section: Quasi-zero-stiffness Mechanismsmentioning

confidence: 99%

“…One is to devise the mechanical structure to decrease the stiffness, and the other is to adjust the stiffness real-time. Introducing the negative stiffness mechanism [67,82] , decreasing the cross-section of the elastic material [56][57][83][84] , and adjusting the amount of compression [71][72]74,85] are the mechanical ways to change the resonator stiffness. Although these mechanical structures are in favor of obtaining band gap in the low-frequency range, these configurations are difficult to change once they were designed.…”

Section: Band Gap Tuning Based On Adjustable Stiffnessmentioning

confidence: 99%

A brief review of metamaterials for opening low-frequency band gaps

Wang

Zhou

Tan

et al. 2022

Appl. Math. Mech.-Engl. Ed.

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Metamaterials are an emerging type of man-made material capable of obtaining some extraordinary properties that cannot be realized by naturally occurring materials. Due to tremendous application foregrounds in wave manipulations, metamaterials have gained more and more attraction. Especially, developing research interest of low-frequency vibration attenuation using metamaterials has emerged in the past decades. To better understand the fundamental principle of opening low-frequency (below 100 Hz) band gaps, a general view on the existing literature related to low-frequency band gaps is presented. In this review, some methods for fulfilling low-frequency band gaps are firstly categorized and detailed, and then several strategies for tuning the low-frequency band gaps are summarized. Finally, the potential applications of this type of metamaterial are briefly listed. This review is expected to provide some inspirations for realizing and tuning the low-frequency band gaps by means of summarizing the related literature.

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“…On the other hand, mechanism-based vibration isolators, such as quasi-zero stiffness (QZS) isolators, become widely used in broadband low-frequency vibration control [26]. A perfect QZS property can be achieved by utilizing a negative stiffness (NS) adjustable mechanism to neutralize the positive stiffness (PS) element [27]. Various QZS isolator designs have been investigated, such as buckling beam [28], cam-roller-spring mechanism [29], horizontal and oblique springs [30,31], X-shaped structure [32], bionic structure [33], and magnetic mechanism [34].…”

Section: Introductionmentioning

confidence: 99%

Uncertainty analysis of quasi-zero stiffness metastructure for vibration isolation performance

Wang

Zhao²,

Ma³

et al. 2022

Front. Phys.

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Quasi-zero stiffness (QZS) metamaterials and metastructures have great advantages of being highly integrable and lightweight for vibration isolation in aerospace and aviation applications. However, the geometric uncertainty introduced from additive manufacturing (AM) significantly affects the metamaterial/metastructure’s vibration isolation performance and therefore, needs to be evaluated accurately and efficiently in the design process. In this study, a high-order sparse Chebyshev polynomial expansion (HOSPSCPE) method is first utilized to quantify the influence of AM-induced geometric uncertainty in the QZS microstructure. Excellent accuracy and much higher efficiency (about 470 times faster) of the proposed method are observed when compared to the widely used Monte Carlo method (MCM). Uncertainty analyses are then conducted for vibration isolation performance of the QZS metastructures and band gap properties of the QZS locally resonant metamaterials, respectively. The numerical results demonstrate that the geometric uncertainty analysis can provide useful guidance and recommendations for the manufacturing-influenced design of QZS metastructures and metamaterials.

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Tunable ultralow frequency wave attenuations in one-dimensional quasi-zero-stiffness metamaterial

Cited by 57 publications

References 43 publications

Tailored Mechanical Metamaterials with Programmable Quasi‐Zero‐Stiffness Features for Full‐Band Vibration Isolation

Tailored Mechanical Metamaterials with Programmable Quasi‐Zero‐Stiffness Features for Full‐Band Vibration Isolation

A brief review of metamaterials for opening low-frequency band gaps

Uncertainty analysis of quasi-zero stiffness metastructure for vibration isolation performance

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