In-plane elasticity of a novel arcwall-based double-arrowed auxetic honeycomb design: Energy-based theoretical analysis and simulation

Tao Wang; Zhen Li; Liangmo WangXianfeng ZhangZhengdong Ma

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In-plane elasticity of a novel arcwall-based double-arrowed auxetic honeycomb design: Energy-based theoretical analysis and simulation

机译：In-plane elasticity of a novel arcwall-based double-arrowed auxetic honeycomb design: Energy-based theoretical analysis and simulation

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摘要

In this paper, a new design of auxetic honeycomb is proposed for mechanical performance enhancement by combining the arc-shaped wall and the normal double-arrowed auxetic configuration. On basis of Mohr's 2nd theorem and Castigliano 2nd theorem, an analytical model considering strut bending and stretching is developed to modulate the in-plane mechanical properties of the proposed honeycomb with the geometric parameters. Further, an integrated experimental, simulation and theoretical approach is carried out to investigate its elastic properties and Poisson's ratios in a wide range. The comparison shows that the theoretical results are in good agreement with the experimental and simulation results, verifying the established analytical model. The results reveal that both the in-plane modulus and the Poisson's ratio of the proposed auxetic honeycomb are simultaneously improved compared to the typical double-arrowed and the re-entrant hexagonal designs, and show high and diverse dependencies on the geometric parameters. Additionally, the honeycomb features a stiffer modulus and stronger auxeticity along y direction than that along x direction when the arc angle of "bone", θ_1, not exceeding a "turning point". The present design may provide an extensive reference for the design and application of mechanical meta-materials.

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来源
《Aerospace science and technology》 |2022年第8期|107715.1-107715.9|共9页
作者
Tao Wang; Zhen Li; Liangmo WangXianfeng ZhangZhengdong Ma;
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作者单位

School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China;

School of Mechanical and Power Engineering Nanjing Tech University, Nanjing 211800, PR China;

Department of Mechanical Engineering, University of Michigan, Ann Arbor, Ml, USA;

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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 honeycomb; Double-arrowed configuration; Arc-shaped wall; Analytical model; Elastic properties; Negative Poisson's ratio;

In-plane elasticity of a novel arcwall-based double-arrowed auxetic honeycomb design: Energy-based theoretical analysis and simulation

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