Mechanical properties of re-entrant anti-chiral auxetic metamaterial under the in-plane compression

Kunyuan, Li; Zhang, Yong; Hou, Yubo; Su, Liang; Zeng, Guoyao; Xu, Xipeng

doi:10.1016/j.tws.2022.110465

Cited by 40 publications

(10 citation statements)

References 56 publications

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“…A comparison between experimentally measured Poisson's ratios in this study and others (Li et al, 30 Meena et al, 31 Johnston and Kazancı, 32 Zhang et al, 33 and Wang et al 34 ) at strains of 5% (A), 15% (B), 25% (C), 35% (D), 45% (E), and 50% (F). NR, not reported.…”

Section: Resultssupporting

confidence: 58%

“…Comparison of experimental δl with modeling results using tetrahedron mesh type at different mesh sizes in the range of 5-0.5 mm at varying strains ranging from 5% to 50%. literature [30][31][32][33][34] is shown in Figure 5. According to the findings, the new auxetic structure exhibits desirable values for its Poisson's ratio.…”

Section: Resultsmentioning

confidence: 99%

“…A comparison between the Poisson's ratios for the developed auxetic structure and some of the structures available in the literature 30–34 is shown in Figure 5. According to the findings, the new auxetic structure exhibits desirable values for its Poisson's ratio.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

An experimental and numerical study on an innovative metastructure for 3D printed thermoplastic polyurethane with auxetic performance

Mojaver,

Azdast,

Hasanzadeh

2024

Polymers for Advanced Techs

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Metamaterials are specifically designed materials that possess unique properties that cannot be found in naturally occurring substances. These remarkable materials have the capability to bring about a significant transformation across a wide range of industries. Auxetic structures are a recent area of research possess a distinctive characteristic known as a negative Poisson's ratio. Unlike conventional materials that contract when stretched, auxetic structures actually expand in two dimensions. In this study, a new auxetic structure was introduced, and thermoplastic polyurethane samples were 3D printed using a fused filament fabrication method. The samples are then subjected to strains ranging from 5% to 50% and Poisson's ratios are measured both experimentally and numerically using finite element method in Ansys software. By comparing the results of the experimental research and simulation, it is evident that applying strains within this range causes the Poisson's ratio of the samples to change from −0.81 to −0.14 and it showed that the newly introduced structure is auxetic. According to the analysis of root mean square error, the hexagonal mesh with a size of 0.7 mm consistently produced the most accurate results, aligning closely with the experimental sample. Given that this is an entirely novel auxetic structure within the category of arrow‐head auxetic structures, there is potential for future research to be conducted in order to further develop and enhance this model.

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Section: Resultssupporting

confidence: 58%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

An experimental and numerical study on an innovative metastructure for 3D printed thermoplastic polyurethane with auxetic performance

Mojaver,

Azdast,

Hasanzadeh

2024

Polymers for Advanced Techs

View full text Add to dashboard Cite

show abstract

“…This point corresponds to the last local maximum in the curve. [ 34,47 ]

$$\eta = \frac{1}{\sigma \left(\right. \epsilon \left.\right)} \int_{0}^{\epsilon} \sigma \left(\right.

…”

Section: Designing and Methodsmentioning

confidence: 99%

“…In order to improve the energy absorption of honeycomb structures, researchers have proposed a series of new structures aimed at improving energy absorption by combining various existing topological properties to create innovative configurations through hybrid design. [32][33][34][35][36][37] For example, Wang et al [38] introduced a star-arrow honeycomb (SAH) by incorporating a doublearrow honeycomb (DAH) unit into the star-shaped honeycomb (SSH). Under low-velocity impact loading, the stress-strain curves of the SAH reveal two plateau stress regions, with the second level of plateau stress exceeding 3 times that of the first level.…”

Section: Introductionmentioning

confidence: 99%

In‐Plane Impact Characteristics of Auxetic Rotating Triangular Honeycomb Inspired by a Rotating Rigid Structure

Chen,

Huang,

Deng

2024

Adv Eng Mater

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Inspired by rotating rigid structures, an auxiliary rotating triangular honeycomb structure (ARTH) is designed in this paper. The structure has dual platform stress, which can reduce the initial peak stress generated during collisions, reducing injuries to pedestrians and vehicle occupants. The accuracy of the finite element numerical model is verified by experiments, and a series of researches are carried out. The mechanical properties of the structure at different velocities are studied and the classification diagram of deformation modes is obtained. Under low‐speed impact load, ARTH has two deformation stages and two stress plateau regions, in which the stress of the second plateau is more than twice that of the first plateau. Then, a theoretical model based on plastic dissipation theory predicts the stress platform at different deformation stages under quasi‐static conditions. Parametric analysis shows that increasing wall thickness t can significantly improve the stress platform and energy absorption, but the negative Poisson’s ratio effect is weakened. The influence of angle θ on the first stage deformation of ARTH is significant. These studies can provide some references for the design of double‐platform stress and the reduction of initial peak stress of rotating auxiliary structures.This article is protected by copyright. All rights reserved.

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In‐Plane Crushing Response of a Novel Arc‐Curved Hybrid Honeycomb with Negative Poisson's Ratio

Ding,

Guo,

Wang

et al. 2024

Physica Status Solidi (b)

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Incorporating arc‐curved configuration into auxetic honeycomb can evenly distribute pressure, reduce stress concentration, and avoid fracture. In this work, a novel arc‐curved chiral star‐shaped honeycomb (ACSH) has been proposed by combining the chiral honeycomb (CH), the star‐shaped honeycomb (SSH), and arc‐curved configurations. The crushing response of the ACSH is studied experimentally and numerically. In order to verify the accuracy of simulation, quasi‐static compression experiment is carried out on the ACSH sample fabricated by 3D printing. Subsequently, the crashworthiness of the ACSH is compared with other honeycombs. Particularly, under the crushing velocity of 2 m s−1, the ACSH exhibits exceptional specific energy absorption, which is 179% higher than that of the conventional SSH. Additionally, it is also found that introducing arc‐curved configuration can effectively reduce initial peak stress. Moreover, the effect of functionally graded design on crashworthiness is systematically analyzed. The findings indicate that the initial peak stress decreases with the decrease of gradient rate. When crushing velocity increases to 80 m s−1, the SEA of the ACSH increases with the increase of gradient rate. This work investigates the crushing response of a novel honeycomb, which can provide a reference for designing and optimizing novel lightweight honeycombs with better crashworthiness.

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Mechanical properties of re-entrant anti-chiral auxetic metamaterial under the in-plane compression

Cited by 40 publications

References 56 publications

An experimental and numerical study on an innovative metastructure for 3D printed thermoplastic polyurethane with auxetic performance

An experimental and numerical study on an innovative metastructure for 3D printed thermoplastic polyurethane with auxetic performance

In‐Plane Impact Characteristics of Auxetic Rotating Triangular Honeycomb Inspired by a Rotating Rigid Structure

In‐Plane Crushing Response of a Novel Arc‐Curved Hybrid Honeycomb with Negative Poisson's Ratio

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