A novel 3D structure with tunable Poisson’s ratio and tailorable coefficient of thermal expansion based on a tri-material triangle unit

Chen, Mingming; Fu, Minghui; Linhua, Lan; Sheshenin, S. V.

doi:10.1016/j.compstruct.2020.112803

Cited by 23 publications

(6 citation statements)

References 37 publications

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“…Duan et al (2020) proposed a novel category of three-dimensional (3D) NPR and positive Poisson’s ratio materials by linking multilayer two-dimensional (2D) NPR materials through 3D chiral chains. On the basis of a tri-material triangle unit, Chen et al (2020) realized a tunable negative Poisson’s ratio and thermal expansion simultaneously on a novel 3D truss structure. To achieve the axisymmetric auxetics, Yang and Ma (2020) proposed a systematic design strategy with rotationally symmetric transverse deformation mode.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study of in-plane uniaxial compression response of PU foam filled aluminum arrowhead auxetic honeycomb

Wu,

Ye,

Zhao

et al. 2024

RPJ

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Purpose Auxetics metamaterials show high performance in their specific characteristics, while the absolute stiffness and strength are much weaker due to substantial porosity. This paper aims to propose a novel auxetic honeycomb structure manufactured using selective laser melting and study the enhanced mechanical performance when subjected to in-plane compression loading. Design/methodology/approach A novel composite structure was designed and fabricated on the basis of an arrowhead auxetic honeycomb and filled with polyurethane foam. The deformation mechanism and mechanical responses of the structure with different structural parameters were investigated experimentally and numerically. With the verified simulation models, the effects of parameters on compression strength and energy absorption characteristics were further discussed through parametric analysis. Findings A good agreement was achieved between the experimental and simulation results, showing an evidently enhanced compression strength and energy absorption capacity. The interaction between the auxetic honeycomb and foam reveals to exploit a reinforcement effect on the compression performance. The parametric analysis indicates that the composite with smaller included angel and higher foam density exhibits higher plateau stress and better specific energy absorption, while increasing strut thickness is undesirable for high energy absorption efficiency. Originality/value The results of this study served to demonstrate an enhanced mechanical performance for the foam filled auxetic honeycomb, which is expected to be exploited with applications in aerospace, automobile, civil engineering and protective devices. The findings of this study can provide numerical and experimental references for the design of structural parameters.

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Section: Introductionmentioning

confidence: 99%

Experimental and numerical study of in-plane uniaxial compression response of PU foam filled aluminum arrowhead auxetic honeycomb

Wu,

Ye,

Zhao

et al. 2024

RPJ

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“…In contrast, metamaterials consisting of the artificial “meta-atoms” could bring out various novel functionalities and, therefore, attract widespread attention. The study on designing such bifunctional metamaterials is scarce, of which the resultant designs can be largely traced to the common auxetic metamaterials, such as re-entrant ,− and chiral types. − To achieve the unusual behavior of thermal expansion, bimaterial layouts are successively developed to reconstruct the original architectures based on the experience or inspiration of researchers, including the bimaterial strip , and bimaterial triangle. − , …”

Section: Introductionmentioning

confidence: 99%

“…31−34 To achieve the unusual behavior of thermal expansion, bimaterial layouts are successively developed to reconstruct the original architectures based on the experience or inspiration of researchers, including the bimaterial strip 32,33 and bimaterial triangle. [25][26][27][28]35 These existing examples normally share several limitations, including the overly rudimentary topological configurations 36 and relatively narrow range of the performance. Therefore, the means to gain more novel and excellent architectures pose a challenge for the design of bifunctional metamaterials.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the means to gain more novel and excellent architectures pose a challenge for the design of bifunctional metamaterials. Another limitation is that most of the reported bifunctional metamaterials just ended with the conceptual design and theoretical analysis without the practical manufacturing and experiments, ,,− ,− exposing the significant lack of effective prototyping and characterization.…”

Section: Introductionmentioning

confidence: 99%

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Bifunctional Metamaterials Incorporating Unusual Geminations of Poisson’s Ratio and Coefficient of Thermal Expansion

Han

Xiao

Chen

et al. 2022

ACS Appl. Mater. Interfaces

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Natural materials overwhelmingly shrink laterally under stretching and expand upon heating. Through incorporating Poisson’s ratio and coefficient of thermal expansion (PR and CTE) in unusual geminations, such as positive PR and negative CTE, negative PR and positive CTE, and even zero PR and zero CTE, bifunctional metamaterials would generate attractive shape control capacity. However, reported bifunctional metamaterials are only theoretically constructed by simple skeletal ribs, and the magnitudes of the bifunctions are still in quite narrow ranges. Here, we propose a methodology for generating novel bifunctional metamaterials consisting of engineering polymers. From concept to refinement, the topology and shape optimization are integrated for programmatically designing bifunctional metamaterials in various germinations of the PR and CTE. The underlying deformation mechanisms of the obtained bifunctions are distinctly revealed. All of the designs with complex architectures and material layouts are fabricated using the multimaterial additive manufacturing, and their effective properties are experimentally characterized. Good agreements of the design, simulation, and experiments are achieved. Especially, the accessible range of the bifunction, namely, PR and CTE, is remarkably enlarged nearly 4 times. These developed approaches open an avenue to explore the bifunctional metamaterials, which are the basis of myriad mechanical- and temperature-sensitive devices, e.g., morphing structures and high-precision components of the sensors/actuators in aerospace and electronical domains.

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“…Typical microstructures include stretch-dominated bimaterial triangles [33,34] and some derived spatial polygons (such as triangular pyramids, quadrangular pyramids, etc [35,36]) and bend-dominated chiral structures [37]. In addition, some structures that realize the coupling of negative thermal expansion and negative PR [38][39][40], which provides the feasibility of multi-field control structures with both temperature and mechanical sensitivity.…”

Section: Introductionmentioning

confidence: 99%

A novel mechanical metamaterial with tailorable Poisson’s ratio and thermal expansion based on a chiral torsion unit

Yang

Huang

et al. 2021

Smart Mater. Struct.

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Auxetic and negative thermal expansion metamaterials have a wide range of applications in flexible electronics, aerospace, biomedicine. Based on the compression/thermal-torsion coupling effects, and combining the special deformation mechanism of the planar anti-tetrachiral structure, this work proposed a novel 3D mechanical metamaterial with negative Poisson's ratio (PR) and negative coefficient of thermal expansion. The mechanical design method of the metamaterial is demonstrated, and the coordinated deformation theory between its in-plane and out-of-plane deformations is established. By numerical simulation, the torsional deformation response of torsion unit of the metamaterials is explored, and Poisson's characteristics and thermal expansion effect of the metamaterials are analyzed. The results show that the PR and thermal expansion effect of the metamaterial can be adjusted and switched, and its deformation behavior can be programmed. The coupling design method for metamaterials provides a good design strategy for engineering applications such as intelligent actuators, flexible robots, and biomedical sensors.

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A novel 3D structure with tunable Poisson’s ratio and tailorable coefficient of thermal expansion based on a tri-material triangle unit

Cited by 23 publications

References 37 publications

Experimental and numerical study of in-plane uniaxial compression response of PU foam filled aluminum arrowhead auxetic honeycomb

Experimental and numerical study of in-plane uniaxial compression response of PU foam filled aluminum arrowhead auxetic honeycomb

Bifunctional Metamaterials Incorporating Unusual Geminations of Poisson’s Ratio and Coefficient of Thermal Expansion

A novel mechanical metamaterial with tailorable Poisson’s ratio and thermal expansion based on a chiral torsion unit

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