Three dimensional lightweight lattice structures with large positive, zero and negative thermal expansion

Wei, Kai; Peng, Yong; Wang, Kaiyu; Duan, Shengyu; Yang, Xujing; Wang, Wen

doi:10.1016/j.compstruct.2018.01.030

Cited by 102 publications

(28 citation statements)

References 29 publications

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“…Their investigation provides distinctive sensing results and therefore avails a novel method to the microfluidic sensor applications by using the sample holder. Although negative material properties-such as negative Poisson's ratio [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22], negative thermal expansion [23][24][25][26][27][28][29][30][31], negative compressibility [32][33][34][35][36][37] and negative moisture expansion [38][39][40]-have been investigated for a few decades due to their capability of behaving in ways that are not achievable by conventional materials, it remains that some applications may require both positive and negative properties depending on the circumstances. For this reason, a series of metamaterials in which their effective material properties can switch between positive and negative signs have been introduced.…”

Section: Introductionmentioning

confidence: 99%

Composite metamaterial square grids with sign-flipping expansion coefficients leading to a type of Islamic design

Lim

2020

SN Appl. Sci.

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A class of 2D metamaterials with sign-switching coefficients of thermal, pressure and moisture expansions is proposed herein-such materials not only change properties with environmental changes, but also reverses between positive and negative. Designed from bimaterial strips and arranged into the form of square grids, changes to environmental conditions transform the square grids into 2D array of 8-pointed stars found in Islamic art and architecture. Results indicate that the bimaterial strip deflection can fit the 8-pointed star when the overall strain is−0.105. Suppose the general expansion coefficients for both materials in the bimaterial strip (1 , 2) are known, then the required environmental changes for attaining the 8-pointed star array can be determined. The currently proposed metamaterial not only demonstrates its capability of attaining properties with reversible sign, but also achieve aesthetic feature with historical significance. Keywords Environmental change • Islamic art • Metamaterials • Sign-toggling List of symbols Generic coefficient of environmental expansion 1 Generic coefficient of environmental expansion for material 1 of bimaterial strip 2 Generic coefficient of environmental expansion for material 2 of bimaterial strip (C) V

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Section: Introductionmentioning

confidence: 99%

Composite metamaterial square grids with sign-flipping expansion coefficients leading to a type of Islamic design

Lim

2020

SN Appl. Sci.

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“…Planar lattices with tailorable CTEs based on dual‐material triangle and tetrahedral units have been investigated by experimental and analytical methods, respectively . Theoretical analysis and numerical verification of bimaterial pyramid and tetrahedron lattice cells with tailorable CTEs have been conducted as well . Recently, 2D and 3D isotropic or anisotropic cellular materials with PTE or NTE due to the convex or/and concave shape in their representative volume elements have been reported …”

Section: Introductionmentioning

confidence: 99%

Angle‐Dependent Transitions Between Structural Bistability and Multistability

Yang

2020

Adv Eng Mater

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Mechanical metamaterials with multi‐nonpositive indexes, especially for a negative Poisson's ratio (NPR)/zero Poisson's ratio (ZPR), negative stiffness (NS)/zero stiffness (ZS), and negative thermal expansion (NTE)/zero thermal expansion (ZTE), have garnered significant interest due to their unprecedented mechanical properties and functional applications for advanced materials and devices. Architected materials with one abnormal index, such as auxetic materials, have been widely studied based on mature and diverse underlying mechanisms. However, metastructures with double or multiple abnormal indexes are rarely reported due to the possible coupling effects between the indexes. Herein, triple‐negative‐index (NPR, NS, and NTE) structural bistability is achieved using assembled composite materials with hexagonal auxetic frameworks and compressed buckled bistable snapping segments. Double‐negative‐one‐zero‐index (NS, NTE, and ZPR) or double‐zero‐one‐negative‐index (ZPR, ZTE, and NS) structural multistability is achieved using assembled composites with rectangular frameworks and compressed buckled bistable snapping segments. Particularly, angle‐dependent transitions between robust structural bistability and multistability are achieved with controllable isotropic or anisotropic thermal expansion. This study demonstrates rationally designed metastructures with multiple abnormal indexes and the potential applications of multifunctional metamaterials.

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“…For example, the position accuracy between the primary mirror and the secondary mirror of the astronomical optical telescope will change due to the influence of thermal expansion and contraction. The thermal deformation of antenna support of communication satellite will lead to antenna offset and deviation from ground communication, and the huge temperature difference experienced by satellite in space will lead to incompatible thermal deformation and spalling of solar cell and substrate [4]. The development of materials with low/negative CTE, high strength and light weight has become one of the frontier scientific and technological fields that scientists all over the world focus on [5,6].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of ZrW₂O₈-Cf/E51 negative thermal expansion composite

Zhang

et al. 2020

Mater. Res. Express

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ZrW 2 O 8 -C f /E51 composite with a negative Coefficient of Thermal Expansion (CTE) was fabricated by a method combining mechanical stirring with ultrasonic vibration, then microstructures and properties of the composites were analyzed and summarized by scanning electron microscope (SEM), DIL 402 C thermal expansion tester and electronic universal testing machine. The results showed that particles distribution defects and impregnation defects of carbon fibers would occur when the process parameters were not controlled properly. Long curing time and good fluidity of resin were beneficial for resin impregnating carbon fibers and bubbles overflow. However, for the ZrW 2 O 8 -C f /E51 composites studied in this paper, long curing time and low viscosity could cause particle settling and accumulation. The experimental results confirmed that the CTE (about −0.52×10 −6 /°C) and tensile strength (about 440 MPa) of E51 resin were improved with the addition of carbon fibers and ZrW 2 O 8 particles.

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Three dimensional lightweight lattice structures with large positive, zero and negative thermal expansion

Cited by 102 publications

References 29 publications

Composite metamaterial square grids with sign-flipping expansion coefficients leading to a type of Islamic design

Composite metamaterial square grids with sign-flipping expansion coefficients leading to a type of Islamic design

Angle‐Dependent Transitions Between Structural Bistability and Multistability

Fabrication and characterization of ZrW₂O₈-Cf/E51 negative thermal expansion composite

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Three dimensional lightweight lattice structures with large positive, zero and negative thermal expansion

Cited by 102 publications

References 29 publications

Composite metamaterial square grids with sign-flipping expansion coefficients leading to a type of Islamic design

Composite metamaterial square grids with sign-flipping expansion coefficients leading to a type of Islamic design

Angle‐Dependent Transitions Between Structural Bistability and Multistability

Fabrication and characterization of ZrW2O8-Cf/E51 negative thermal expansion composite

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Product

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Fabrication and characterization of ZrW₂O₈-Cf/E51 negative thermal expansion composite