In-plane compressive properties of assembled auxetic chiral honeycomb composed of slotted wave plate

Zhang, Yi; Ren, Xin; Jiang, Wei; Han, Dong; Zhang, Xiang Yu; Pan, Yang; Xie, Yi Min

doi:10.1016/j.matdes.2022.110956

Cited by 46 publications

(10 citation statements)

References 57 publications

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“…A comparison between experimentally measured Poisson's ratios in this study and others (Li et al, 30 Meena et al, 31 Johnston and Kazancı, 32 Zhang et al, 33 and Wang et al 34 ) at strains of 5% (A), 15% (B), 25% (C), 35% (D), 45% (E), and 50% (F). NR, not reported.…”

Section: Resultssupporting

confidence: 57%

“…Comparison of experimental δl with modeling results using tetrahedron mesh type at different mesh sizes in the range of 5-0.5 mm at varying strains ranging from 5% to 50%. literature [30][31][32][33][34] is shown in Figure 5. According to the findings, the new auxetic structure exhibits desirable values for its Poisson's ratio.…”

Section: Resultsmentioning

confidence: 99%

“…Then, by increasing the amount of strain from 30% to 50%, the amount of transverse length change decreases. δl decreases Meena [32] Johnston [33] Zhang [34] Wang [35] This study…”

Section: Resultsmentioning

confidence: 99%

“…A comparison between the Poisson's ratios for the developed auxetic structure and some of the structures available in the literature 30–34 is shown in Figure 5. According to the findings, the new auxetic structure exhibits desirable values for its Poisson's ratio.…”

Section: Resultsmentioning

confidence: 99%

See 3 more Smart Citations

An experimental and numerical study on an innovative metastructure for 3D printed thermoplastic polyurethane with auxetic performance

Mojaver,

Azdast,

Hasanzadeh

2024

Polymers for Advanced Techs

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Metamaterials are specifically designed materials that possess unique properties that cannot be found in naturally occurring substances. These remarkable materials have the capability to bring about a significant transformation across a wide range of industries. Auxetic structures are a recent area of research possess a distinctive characteristic known as a negative Poisson's ratio. Unlike conventional materials that contract when stretched, auxetic structures actually expand in two dimensions. In this study, a new auxetic structure was introduced, and thermoplastic polyurethane samples were 3D printed using a fused filament fabrication method. The samples are then subjected to strains ranging from 5% to 50% and Poisson's ratios are measured both experimentally and numerically using finite element method in Ansys software. By comparing the results of the experimental research and simulation, it is evident that applying strains within this range causes the Poisson's ratio of the samples to change from −0.81 to −0.14 and it showed that the newly introduced structure is auxetic. According to the analysis of root mean square error, the hexagonal mesh with a size of 0.7 mm consistently produced the most accurate results, aligning closely with the experimental sample. Given that this is an entirely novel auxetic structure within the category of arrow‐head auxetic structures, there is potential for future research to be conducted in order to further develop and enhance this model.

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Section: Resultssupporting

confidence: 57%

Section: Resultsmentioning

confidence: 99%

“…Then, by increasing the amount of strain from 30% to 50%, the amount of transverse length change decreases. δl decreases Meena [32] Johnston [33] Zhang [34] Wang [35] This study…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

An experimental and numerical study on an innovative metastructure for 3D printed thermoplastic polyurethane with auxetic performance

Mojaver,

Azdast,

Hasanzadeh

2024

Polymers for Advanced Techs

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“…Metamaterials [1][2][3] are artificially designed micro-structured composite with periodic or aperiodic arrangements, which has extraordinary properties that do not exist in nature, such as negative Poisson's ratio (NPR) [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18], negative thermal expansion [19], negative refractive index [20], negative stiffness [21], negative compressibility, etc. In the past few In 1991, Evans et al [38] defined the materials with NPR function as 'auxetics'.…”

Section: Introductionmentioning

confidence: 99%

A novel re-entrant honeycomb metamaterial with tunable bandgap

Tao

Ren

Sun

et al. 2022

Smart Mater. Struct.

Self Cite

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An auxetic metamaterial consisting of a re-entrant honeycomb structure with hierarchical characteristics is proposed. The new structure is constructed by attaching small re-entrant structural unit cells to the nodes of the traditional re-entrant structures. Not only can the overall stiffness and stability of the proposed structure be tuned during compression and tension, but better acoustic performance is also obtained compared with traditional re-entrant honeycomb structures (T-RHS). Firstly, the deformation mechanism of the bandgap is numerically explored by analyzing the dispersion curve of the microstructure as well as the upper and lower bounds of the bandgap vibrational modes. Secondly, the bandgap tunability of the designed structure under uniaxial compression or tension is discussed. Finally, the transmittance of finite period size is calculated to verify the numerical results of the bandgap. Numerical simulation results show that the proposed novel re-entrant honeycomb structure with hierarchical characteristics (RHS-H) has attenuation characteristics of a tunable low-frequency plane wave through a reasonable selection of compressive strain, tensile strain and geometric parameters. The vibration damping strength of the bandgap increases under tensile strain. When the auxetic effect is enhanced, the first and second bandgaps become lower and wider. The novel metamaterial has potential applications in vibration and noise reduction and the design of acoustic devices in dynamic environments, while providing new ideas and a methodology for the real-time adjustment of bandgaps.

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Double‐Spirals Offer the Development of Preprogrammable Modular Metastructures

2023

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Metamaterials with adjustable, sometimes unusual properties offer advantages over conventional materials with predefined mechanical properties in many technological applications. A group of metamaterials, called modular metamaterials or metastructures, are developed through the arrangement of multiple, mostly similar building blocks. These modular structures can be assembled using prefabricated modules and reconfigured to promote efficiency and functionality. Herein, a novel modular metastructure is developed by taking advantage of the high compliance of preprogrammable double‐spirals. First, the mechanical behavior of a four‐module metastructure under tension, compression, rotation, and sliding is simulated using the finite‐element method. Then, 3D printing and mechanical testing are used to illustrate the tunable anisotropic and asymmetric behavior of the spiral‐based metastructures in practice. The results show the simple reconfiguration of the presented metastructure toward the desired functions. The mechanical behavior of single double‐spirals and the characteristics that can be achieved through their combinations make our modular metastructure suitable for various applications in robotics, aerospace, and medical engineering.

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In-plane compressive properties of assembled auxetic chiral honeycomb composed of slotted wave plate

Cited by 46 publications

References 57 publications

An experimental and numerical study on an innovative metastructure for 3D printed thermoplastic polyurethane with auxetic performance

An experimental and numerical study on an innovative metastructure for 3D printed thermoplastic polyurethane with auxetic performance

A novel re-entrant honeycomb metamaterial with tunable bandgap

Double‐Spirals Offer the Development of Preprogrammable Modular Metastructures

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