A Study of Negative Poisson’s Ratio of 3D Printed Auxetic Structures

Xue, Bin; Li, Jianwei; Huang, Rui; Yang, Yao-Zong; Gong, Hua-Shuai; Zhang, Qiming; Kong, Linghao; Li, D. M.

doi:10.3103/s0025654422060139

Cited by 8 publications

(2 citation statements)

References 42 publications

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“…Kim et al [22] developed new soft-assisted structures with the help of 3D printing technology to achieve high manufacturing reliability and repeatability. Xue et al [23] investigated the properties of negative Poisson's ratio and folded hexagonal honeycomb structures through light-curing 3D printing experiments.…”

Section: Introductionmentioning

confidence: 99%

Mechanics Characteristics of a 3D Star-Shaped Negative Poisson’s Ratio Composite Structure

Yang

Huang

et al. 2023

Materials

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A negative Poisson’s ratio honeycomb material has the characteristics of anti-conventional deformation behavior and high impact resistance, which is a new lightweight microstructure material with broad application prospects. However, most of the current research is still at the microscopic level and two-dimensional level, and little research has been carried out for three-dimensional structures. Compared with the two-dimensional level, three-dimensional negative Poisson’s ratio structural mechanics metamaterials have the advantages of a lighter mass, higher material utilization, and more stable mechanical properties, and they have great potential for development in the fields of aerospace, the defense industry, and vehicles and ships. This paper presents a novel 3D star-shaped negative Poisson’s ratio cell and composite structure, inspired by the octagon-shaped 2D negative Poisson’s ratio cell. The article carried out a model experimental study with the help of 3D printing technology and compared it with the numerical simulation results. The effects of structural form and material properties on the mechanical characteristics of 3D star-shaped negative Poisson’s ratio composite structures were investigated through a parametric analysis system. The results show that the error of the equivalent elastic modulus and the equivalent Poisson’s ratio of the 3D negative Poisson’s ratio cell and the composite structure is within 5%. The authors found that the size of the cell structure is the main factor affecting the equivalent Poisson’s ratio and the equivalent elastic modulus of the star-shaped 3D negative Poisson’s ratio composite structure. Furthermore, among the eight real materials tested, rubber exhibited the best negative Poisson’s ratio effect, while the copper alloy showed the best effect among the metal materials, with a Poisson’s ratio between −0.058 to −0.050.

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Section: Introductionmentioning

confidence: 99%

Mechanics Characteristics of a 3D Star-Shaped Negative Poisson’s Ratio Composite Structure

Yang

Huang

et al. 2023

Materials

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“…Due to their diverse properties, metamaterials are used in many fields such as civil engineering 12 , aerospace engineering 13 , mechanical engineering 14 , vehicle engineering 15 , acoustics 16 , optics 17 , etc. The most classical of the extraordinary properties of metamaterials are the negative Poisson's ratio effect [18][19][20] and the zero Poisson's ratio effect [21][22][23] . Compared with conventional honeycomb structures, honeycomb structures with negative Poisson's ratio effect have more excellent mechanical properties and show good prospects for applications in the automotive and aerospace fields.…”

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confidence: 99%

A concave four-arc honeycomb with enhanced stiffness and desirable negative Poisson’s effect

Feng,

Tie,

Guo

et al. 2023

Sci Rep

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The conventional star-shaped honeycomb (CSSH) structure is inherently rich in mechanical properties. Based on the CSSH structure, the Poisson's ratio and Young’s modulus can be improved by adding the tip re-entrant angle (ISSH). In this paper, a new concave four-arc honeycomb (CFAH) structure is proposed by designing the straight rod as a curved rod and retaining the tip re-entrant angle from the ISSH structure. The Young's modulus, specific stiffness and Poisson’s ratio of CFAH structures are derived from Castigliano’s second theorem and Moore’s theorem. The theoretical results show good agreement with the numerical and experimental results. The results show that the normalized effective specific stiffness and normalized effective Young’s modulus of the CFAH structure are further improved by about 12.95% and 16.86%, respectively, compared with the ISSH structure, and more significant auxiliary effects are obtained. CFAH structures show good promise in aerospace, construction and other applications due to their enhanced mechanical property. Meanwhile, the present work provides guidance for the study of concave four-arc honeycomb structures.

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