A novel star-shaped honeycomb with enhanced energy absorption

Li, Xuelin; Li, Zhuangzhuang; Guo, Zhenyan; Mo, Zonglai; Li, Jun

doi:10.1016/j.compstruct.2023.116716

Cited by 41 publications

(5 citation statements)

References 49 publications

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“…where E 1 is Young's modulus of the honeycomb structure, E s is Young's modulus of the substrate, and ρ is the relative density of the honeycomb structure. Deformation regularity is evaluated using the maximum deviation of unidirectional horizontal strains (MDUHS) [25]. The smaller the value of MDUHS is, the more regular the overall deformation of the honeycomb.…”

Section: Discussionmentioning

confidence: 99%

“…Yang et al [24] designed a new 3D star structure with a negative Poisson's ratio based on the traditional 2D star structure with a negative Poisson's ratio, and explored the effects of impact velocity and design angle on the dynamic deformation mode and mechanical response of the star model. Li et al [25] designed a crossed star honeycomb by evolving the horizontal and vertical walls of a conventional star honeycomb into crossed sloping walls and explored the effects of the inclination angle on Poisson's ratio, Young's modulus, and the energy absorption. Hu et al [26] printed models using 316 L steel and performed material tensile testing and honeycomb compression testing.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the Energy Absorption Characteristics and Negative Poisson’s Ratio Effect of an Improved Star-Shaped Honeycomb

Li,

Cao,

et al. 2023

JMSE

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An improved star-shaped honeycomb (ISSH) is a kind of honeycomb structure with excellent performance. The main objective of this study was to provide some ideas for the optimization of the ISSH structure in ships. As a result, 2D-ISSH specimens were fabricated using 3D printing technology, and a quasistatic compression test was carried out to investigate the deformation mode and mechanical properties. The experimental results showed that the 2D-ISSH structure exhibited “V”-shaped and “-”-shaped deformation patterns with a double-platform stress stage. To further utilize the excellent performance of the structure and obtain a better negative Poisson’s ratio effect and broader application, based on the properties of the 2D-ISSH specimen, a 3D-ISSH structure was proposed and a finite element simulation was carried out. The simulation results of the 3D-ISSH structure showed different deformation patterns, including “X”- shaped and “-”-shaped patterns. According to the deformation mechanism of typical cells, the stress formula for the 3D-ISSH double platform was derived, and the theoretical results agreed well with the numerical results. The effects of the structural design, materials, and dimensions on the mechanical properties, such as the energy absorption and negative Poisson’s ratio, of the ISSH and similar structures were explored. The combined performance of various honeycombs was evaluated from multiple perspectives.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of the Energy Absorption Characteristics and Negative Poisson’s Ratio Effect of an Improved Star-Shaped Honeycomb

Li,

Cao,

et al. 2023

JMSE

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“…Where 𝜀 𝑐𝑟 is the first stress peak corresponding to the first stress strain and 𝜀 𝑑 is the densification strain [41].…”

Section: Mechanical Performance Indicatorsmentioning

confidence: 99%

Energy absorption characteristics of novel square chiral honeycomb

Wang,

Deng

2024

J Braz. Soc. Mech. Sci. Eng.

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which offer exceptional mechanical properties such as shear resistance, attenuation and impact resistance. Taking inspiration from circular chiral structures, the paper introduces a novel square chiral structure. A finite element numerical model was constructed using Abaqus/Explicit, and its accuracy was verified and a series of studies were carried out. Initially, a comparative analysis was performed to examine the mechanical properties and deformation modes of two structures: the super-square chiral honeycomb (SSCH) and the tetrachiral chiral honeycomb (TCH). For the same mass, the super-square chiral honeycomb has better energy absorption performance than the tetrachiral honeycomb, with SSCH absorbing 1.09 times the energy of TCH.Additionally, at the same mass, SSCH has a better deformation mode and lower initial peak force than TCH. Subsequently, a systematic parametric study of SSCH was carried out by varying the ratio of quadrilateral side lengths of square chiral structure ribs, wall thickness, and impact velocity. The structure investigated in this paper can provide a reference for the innovative design of the chiral honeycomb structure for specific applications.

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“…In their study, Xiang at all investigated the relationship between NPR and negative thermal expansion (NTE) in a designed structure based on a star-shaped structure [4]. 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.…”

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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A novel star-shaped honeycomb with enhanced energy absorption

Cited by 41 publications

References 49 publications

Investigation of the Energy Absorption Characteristics and Negative Poisson’s Ratio Effect of an Improved Star-Shaped Honeycomb

Investigation of the Energy Absorption Characteristics and Negative Poisson’s Ratio Effect of an Improved Star-Shaped Honeycomb

Energy absorption characteristics of novel square chiral honeycomb

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

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