In-plane elastic properties of a novel re-entrant auxetic honeycomb with zigzag inclined ligaments

Zhu Y.; Luo Y.; Gao D.Zhang C.Yu C.Ren X.

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In-plane elastic properties of a novel re-entrant auxetic honeycomb with zigzag inclined ligaments

机译：In-plane elastic properties of a novel re-entrant auxetic honeycomb with zigzag inclined ligaments

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? 2022 Elsevier LtdConventional two-dimensional (2D) re-entrant auxetic honeycomb is one of the earliest examples of auxetic metamaterials. Recently, plenty of 2D re-entrant honeycomb variants are developed to enhance their stiffness. However, the stiffness enhancement for most of the existing designs is generally obtained with compromising the conjugated auxeticity. Moreover, most of the existing designs are hard to be fabricated by low-cost traditional manufacturing technology due to their complex architectures. The present work aims to enhance the stiffness without compromising the conjugated auxeticity, and yet retains its convenience and low-cost for fabrication. By introducing zigzag inclined ligaments, a novel 2D re-entrant auxetic honeycomb metamaterial is firstly proposed. Based on Castigliano's second theorem, a theoretical model of the proposed design is established to facilitate the understanding of the underlying microstructural mechanisms. The obtained analytical solutions, as validated by systematic finite element (FE) analyses, elucidate different roles of the microstructural geometry on the effective mechanical properties of the proposed re-entrant auxetic honeycomb metamaterial. Compared with the conventional re-entrant auxetic honeycomb, which is a particular case of the present design, both the stiffness and the auxeticity along specific principal directions of the present design are improved remarkably.

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《Engineering structures》 |2022年第1期|1-14|共14页
作者
Zhu Y.; Luo Y.; Gao D.Zhang C.Yu C.Ren X.;
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作者单位

Research Institute of Engineering Safety Assessment and Protection School of Civil Engineering and Geomatics Southwest Petroleum UniversityResearch Institute of Engineering Safety Assessment and Protection School of Civil Engineering and Geomatics Southwe;

Research Institute of Engineering Safety Assessment and Protection School of Civil Engineering and Geomatics Southwest Petroleum University;

Chair of Structural Mechanics Department of Civil Engineering University of SiegenApplied Mechanics and Structure Safety Key Laboratory of Sichuan Province School of Mechanics and Engineering Southwest Jiaotong UniversityCentre for Innovative Structures College of Civil Engineering Nanjing Tech University;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
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关键词
Auxetic metamaterial; Enhanced stiffness; Low-cost traditional manufacturing; Negative Poisson's ratio; Re-entrant honeycomb; Tunable mechanical parameters;

In-plane elastic properties of a novel re-entrant auxetic honeycomb with zigzag inclined ligaments

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