Negative Poisson's ratio in non‐porous smooth curve sheet

Tan, Huifeng; Yu, Lin; Zhou, Zhen-Gong

doi:10.1002/pssb.201600612

Cited by 12 publications

(9 citation statements)

References 41 publications

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“…The assumptions included the following: that auxetic structure is perfectly periodic, straight ligaments of corrugated sheets are always kept straight under loading conditions, the shape of each corrugated sheet is formed by connecting straight ligaments with circular arcs, the thickness of corrugated sheets is ignorable, tubes are firmly connected with corrugated sheets, and no slippage takes place between pipes and corrugated sheets [93]. The previous studies on the auxeticity of single and double-layer carbon nanotube sheets (buckypaper) and graphene sheets have been carried out by Hall et al [94], Scarpa et al [95], Grima et al [96], and Tan et al [97].…”

Section: Crumpled and Perforated Sheets Modelsmentioning

confidence: 99%

Cellular Auxetic Structures for Mechanical Metamaterials: A Review

Kelkar

Kim

Cho

et al. 2020

Sensors

152

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Recent advances in lithography technology and the spread of 3D printers allow us a facile fabrication of special materials with complicated microstructures. The materials are called “designed materials” or “architectured materials” and provide new opportunities for material development. These materials, which owing to their rationally designed architectures exhibit unusual properties at the micro- and nano-scales, are being widely exploited in the development of modern materials with customized and improved performance. Meta-materials are found to possess superior and unusual properties as regards static modulus (axial stress divided by axial strain), density, energy absorption, smart functionality, and negative Poisson’s ratio (NPR). However, in spite of recent developments, it has only been feasible to fabricate a few such meta-materials and to implement them in practical applications. Against such a backdrop, a broad review of the wide range of cellular auxetic structures for mechanical metamaterials available at our disposal and their potential application areas is important. Classified according to their geometrical configuration, this paper provides a review of cellular auxetic structures. The structures are presented with a view to tap into their potential abilities and leverage multidimensional fabrication advances to facilitate their application in industry. In this review, there is a special emphasis on state-of-the-art applications of these structures in important domains such as sensors and actuators, the medical industry, and defense while touching upon ways to accelerate the material development process.

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Section: Crumpled and Perforated Sheets Modelsmentioning

confidence: 99%

Cellular Auxetic Structures for Mechanical Metamaterials: A Review

Kelkar

Kim

Cho

et al. 2020

Sensors

152

View full text Add to dashboard Cite

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“…[ 45 ] Previous work has also revealed that structures featuring a periodic array of domes can be fabricated from plastics or by stamping metal sheets at high temperatures. [ 46,47 ] However, the metamaterial features of these structures have not yet been fully explored, with attention concentrated on the auxetic behavior, [ 48,49 ] surface‐fluid interactions, [ 50 ] and optical properties from local morphing. [ 51 ] Allowing the constituent material to be softer should enable reversible inversion of domes and full re‐programmability of the metamaterial sheet.…”

Section: Introductionmentioning

confidence: 99%

Dome‐Patterned Metamaterial Sheets

et al. 2020

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The properties of conventional materials result from the arrangement of and the interaction between atoms at the nanoscale. Metamaterials have shifted this paradigm by offering property control through structural design at the mesoscale, thus broadening the design space beyond the limits of traditional materials. A family of mechanical metamaterials consisting of soft sheets featuring a patterned array of reconfigurable bistable domes is reported here. The domes in this metamaterial architecture can be reversibly inverted at the local scale to generate programmable multistable shapes and tunable mechanical responses at the global scale. By 3D printing a robotic gripper with energy-storing skin and a structure that can memorize and compute spatially-distributed mechanical signals, it is shown that these metamaterials are an attractive platform for novel mechanologic concepts and open new design opportunities for structures used in robotics, architecture, and biomedical applications.

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“…In fact, it has been used as the plate heat exchanger as shown in Figure 1. Due to the existence of the convexities, the energy absorption capacity is obviously improved and the service life is greatly enhanced [7][8][9]. Haldar et al [10] focused on studying the influence of the thickness of convexities on the energy absorption and obtained the optimal energy absorption properties of the convex-concave plate by comparing the experimental and finite element simulation results.…”

Section: Introductionmentioning

confidence: 99%

Structural Analysis of Composite Conical Convex-Concave Plate (CCCP) Using VAM-Based Equivalent Model

Yifeng

Shi

2021

Materials

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Compared with the ordinary foundation plate, the composite conical convex-concave plate (CCCP) has obvious anisotropic characteristics, and there is less research on the relationship between its mechanical properties and structural parameters. In this article, a numerical model for the equivalent stiffness of a typical unit cell with conical convex is established by using the variational asymptotic method. Then, the 3D finite element model (3D-FEM) of CCCP is transformed into 2D equivalent plate model (2D-EPM) with the effective plate properties obtained from the constitutive analysis of unit cell. The accuracy of 2D-EPM is verified by comparing with the displacement, natural frequencies, and buckling results from 3D-FEM under different boundary conditions. Then, the influence of geometric parameters and layup configurations on the effective performances of CCCP are investigated. Finally, the buckling loads and natural frequencies of bidirectional CCCP are compared with those of CCCP by using the present model. The present model is particularly useful in the early design stage of CCCP where many design trade-offs need to be made over a vast design space in terms of material selection, ply angles, and geometric parameters.

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Negative Poisson's ratio in non‐porous smooth curve sheet

Cited by 12 publications

References 41 publications

Cellular Auxetic Structures for Mechanical Metamaterials: A Review

Cellular Auxetic Structures for Mechanical Metamaterials: A Review

Dome‐Patterned Metamaterial Sheets

Structural Analysis of Composite Conical Convex-Concave Plate (CCCP) Using VAM-Based Equivalent Model

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