Study on elastic mechanical properties of novel 2D negative Poisson’s ratio structure: Re-entrant hexagon nested with star-shaped structure

Jin, Yu-Tong; Qie, Yan-Hui; Li, Ningning; Li, Naiwen

doi:10.1016/j.compstruct.2022.116065

Cited by 18 publications

(4 citation statements)

References 38 publications

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“…Furthermore, the absolute value of Poisson's ratio increases with the increase of 1 q and , 2 q that is to say, a structure with a larger Poisson's ratio can be designed by 1 q and . 2 q The novel 3D orthogonal star structure proposed in this study improved the strength of the star structure and significantly affected the negative Poisson's ratio performance by all the parameters of length, angle and thickness, that is different from other star structures connected by beams [45,46,49] which can make the design more flexible. The value of 2 q can be adjusted to change the Young's modulus of the structure without changing the Poisson's ratio.…”

Section: Discussionmentioning

confidence: 95%

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A novel three-dimensional orthogonal star honeycomb structure with negative Poisson’s ratio

He,

Huang,

Shi

2024

Eng. Res. Express

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A novel three-dimensional(3D) orthogonal star honeycomb structure with increased strength and negative Poisson’s ratio(NPR) performance that is not subject to angle constraints was proposed, and the calculation model of Young's modulus and Poisson's ratio of the cell structure under axial load was derived in this study. Through the investigation of the deformation mode and the finite element (FE) research results of the structure, it is found that the longitudinal length parameter l_2 and angle parameter θ_2 are important concave axes that affect the mechanical properties of materials. The quasi-static compression experimental results shows that the constraints of adjacent elements can enhance the strength of the structure to a certain extent, and the theoretical analysis results and the FE simulation results were in good agreement with the experimental results. In addition, the results are also concluded that the prediction of Young's modulus and Poisson's ratio and the designability of mechanical properties of 3D orthogonal star honeycomb structures could be achieved by the theoretical calculation formula derived in this study.

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Section: Discussionmentioning

confidence: 95%

“…Ren [48] proposed a new star-shaped honeycomb structure with adjustable NPR and band gap. Jin [49] designed a nested concave hexagonal and star-shaped structure to improve the strength of the structure. However, the strength of the structure was not stable and there was no good Poisson's ratio performance when the concave angle was small.…”

Section: Introductionmentioning

confidence: 99%

A novel three-dimensional orthogonal star honeycomb structure with negative Poisson’s ratio

He,

Huang,

Shi

2024

Eng. Res. Express

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“…Lin et al [12] established a selfsimilar concentric star shaped NPR honeycomb structure and studied its dynamic response under different impact velocities. Jin et al [13] proposed a re-entrant hexagonal nested star cell structure with NPR and studied its load-bearing capacity and energy absorption capacities. Hai et al [14] proposed a modified double re-entrant honeycomb structure and demonstrated that the structure broadens the range of effective modulus and NPR values and also has good impact resistance.…”

Section: Introductionmentioning

confidence: 99%

Impact resistance analysis of a dual-constituent negative Poisson’s ratio lattice metamaterial with tailorable coefficient of thermal expansion

Dong,

Li,

Cui

et al. 2024

Phys. Scr.

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The combination of parameters such as negative Poisson's ratio (NPR) and negative coefficient of thermal expansion (NCTE) can result in novel materials with specialized functions to meet the requirements of multifunctional and multipurpose devices. However, the additional structural design to meet NCTE requires a re-examination of its impact resistance. In this paper, the deformation modes and impact resistance of dual-constituent re-entrant hexagonal lattice metamaterial (DRHLM) with both NPR and NCTE are investigated under different impact velocities, and the nominal stress-strain curves and energy absorption characteristics of DRHLM structures with different arch heights, chord lengths, and angles of the bottom edge ribs and the diagonal ribs are discussed. The results show that the bi-material bending ribs affect the energy absorption of the structure, and in most cases the DRHLM structure has a better energy absorption capacity than the traditional concave hexagonal structure, but too much or too little curvature of the bi-material portion reduces the energy absorption characteristics of the DRHLM structure. In addition, the increase in the pinch angle of the ribs leads to the weakening of the negative Poisson’s ratio effect, which is also detrimental to the energy absorption of the structure. The work done can provide guidance for finding the dimensional parameters of DRHLM structures with optimal energy absorption performance.

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“…The energy absorption in a star-shaped structure with different types of bonding in metamaterial was theoretically, numerically and experimentally studied, in [5]. A study from 2022 demonstrated the elastic mechanical properties of a novel 2D NPR structure obtained through the combination of a Re-entrant hexagon and star-shaped structure [6].In [7], the alteration of the geometry of the starshaped structure led to an improvement in the mechanical properties of the structure. Zhang et all [8] designed a new structure inspired by the star-shaped structure, which they named the butterfly-shaped structure, to achieve higher stiffness while retaining the structure's ability to exhibit NPR.…”

Section: Introductionmentioning

confidence: 99%

Analytical and numerical analysis of the modified 2D arc-star-shaped structure with negative Poisson's ratio

Sinđelić,

Nikolić,

Bogojević

et al. 2024

Engineering Today

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The Poisson's ratio represents one of the very important characteristics of mechanical metamaterials. Thanks to additive manufacturing, it is now much simpler to create structures for the study of Poisson's ratio. Particularly, for research purposes, re-entrant structures are of interest as they can exhibit negative values of Poisson's ratio. Due to their capabilities , such structures find extensive applications across various industries. The modified arc-star-shaped (m2D-AS) has been studied analytically and numerically, and the negative Poisson's ratio (NPR) and Young's modulus has been examined for different geometric parameters of the structure.

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Study on elastic mechanical properties of novel 2D negative Poisson’s ratio structure: Re-entrant hexagon nested with star-shaped structure

Cited by 18 publications

References 38 publications

A novel three-dimensional orthogonal star honeycomb structure with negative Poisson’s ratio

A novel three-dimensional orthogonal star honeycomb structure with negative Poisson’s ratio

Impact resistance analysis of a dual-constituent negative Poisson’s ratio lattice metamaterial with tailorable coefficient of thermal expansion

Analytical and numerical analysis of the modified 2D arc-star-shaped structure with negative Poisson's ratio

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