4D printed zero Poisson's ratio metamaterial with switching function of mechanical and vibration isolation performance

Liu, Kai; Han, Lu; Wei, Hu; Ji, Longtao; Zhu, Shengxin; Wan, Zhishuai; Yang, Xudong; Wei, Yu‐Ling; Dai, Zhendong; Zhao, Zeang; Li, Zhen; Wang, Pengfei; Tao, Ran

doi:10.1016/j.matdes.2020.109153

Cited by 62 publications

(22 citation statements)

References 24 publications

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“…[4,5] Moreover, some structures with zero PR under specific applications are classified as metamaterials. [6][7][8] In addition to examining structures with negative PR, researchers have also paid attention to designing metamaterials with negative thermal expansion. [9,10] Auxetic materials of different scales, from molecular structures [11] to macroscale configurations, [12,13] have been investigated, thus confirming their applicability in various areas.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Mechanical Properties of Auxetic Metamaterials by Incorporating Nonrectangular Cross Sections into Their Component Rods: A Finite Element Analysis

Kavakli

Davar

2023

Physica Status Solidi (b)

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Herein, four prevalent architectures of metamaterials, namely, the arc‐star, star, reentrant, and antichiral models, are examined to study the effects of the cross‐sectional shapes of component rods on the stiffness and Poisson's ratios of the materials. Four differently sized cross sections of rods are designed, and two types of cross‐sectional geometries—square and I‐shaped—are adopted. Aspect ratios of 0.5, 0.75, and 1 are considered for the I‐shaped cross‐sectional models. A total of 64 metamaterial models are analyzed. The results show that the stiffness and negative Poisson's ratios of the metamaterials depend primarily on their architectures. For example, the antichiral model exhibits approximately 13 times more stiffness than its arc‐star counterpart. The cross‐sectional geometries of the component rods also play an essential role in the mechanical behaviors of the metamaterials. For instance, the antichiral architecture, which consists of bars with an I‐shaped section that has a width‐to‐height ratio of 0.5, has an elastic modulus 9 times greater than that of the model composed of bars with a square cross section. This study shows that it is possible to design metamaterials several times stronger simply by changing the shape of the cross section of their constituent elements without compromising on their lightweight property.

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Section: Introductionmentioning

confidence: 99%

Enhancing the Mechanical Properties of Auxetic Metamaterials by Incorporating Nonrectangular Cross Sections into Their Component Rods: A Finite Element Analysis

Kavakli

Davar

2023

Physica Status Solidi (b)

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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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“…Mechanical systems that achieve actively tunable stiffness are desirable for numerous applications. Such applications include robots that mimic the adaptable stiffness capabilities found in nature for effectively responding to changing ambient conditions, [1][2][3][4][5] sensors and actuators that tune stiffness to customize their sensitivity and resolution, 6 vibration isolators that adapt their resonant frequencies to filter out targeted vibrations, 7,8 and medical devices that can be made compliant to achieve safe human interactions but then can be made stiff to withstand force applications as necessary. 9 The principles underlying how a mechanical system's stiffness can be tuned vary dramatically.…”

Section: Introductionmentioning

confidence: 99%

Compliant mechanisms that achieve binary stiffness along multiple degrees of freedom

Shimohara

Lee

Hopkins

2022

Journal of Composite Materials

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Here we introduce compliant mechanisms that can be triggered using bistable switches to achieve two different states of stiffness (i.e., high and low stiffness) along multiple degrees of freedom The compliant mechanisms leverage principles of constraint manipulation and stiffness cancelation to achieve these binary states with a stiffness difference as large as an order of magnitude. Although these principles have been used in prior works to achieve binary stiffness in compliant mechanisms that achieve a single degree of freedom (DOF) (e.g., a single translation or a single rotation), this work advances the theory to achieve binary stiffness in compliant mechanisms that achieve multiple DOFs. Specifically, two designs are introduced, fabricated, and tested to demonstrate binary stiffness in two DOFs. The first design achieves binary stiffness along two orthogonal translational DOFs and the second design achieves binary stiffness about two orthogonal rotational DOFs with intersecting axes.

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4D printed zero Poisson's ratio metamaterial with switching function of mechanical and vibration isolation performance

Cited by 62 publications

References 24 publications

Enhancing the Mechanical Properties of Auxetic Metamaterials by Incorporating Nonrectangular Cross Sections into Their Component Rods: A Finite Element Analysis

Enhancing the Mechanical Properties of Auxetic Metamaterials by Incorporating Nonrectangular Cross Sections into Their Component Rods: A Finite Element Analysis

Topological state transfer in Kresling origami

Compliant mechanisms that achieve binary stiffness along multiple degrees of freedom

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