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Novel 2D star-shaped honeycombs with enhanced effective Young’s modulus and negative Poisson’s ratio
Extreme Mechanics Letters ( IF 4.7 ) Pub Date : 2020-12-30 , DOI: 10.1016/j.eml.2020.101164
Na Xu , Hai-Tao Liu , Ming-Ran An , Liang Wang

In the present paper, three kinds of novel two-dimensional enhanced star-shaped honeycombs (2D-ESSH) are proposed, which are consisted of the two-dimensional star-shaped honeycomb (2D-SSH) and reinforcing rods. Relative densities of the 2D-SSH and three kinds of 2D-ESSH are deduced. Mechanical properties of the proposed novel 2D-ESSH are investigated via finite-element simulations and compression experiments. The effects of the effective length, the angle of the outer cell walls, the thickness of the outer cell walls, the angle of the inner cell walls, and the thickness of the inner cell walls on the effective Poisson’s ratio and effective Young’s modulus of the structures are explored in detail. The results show that the novel 2D-ESSH can effectively regulate the effect of negative Poisson’s ratio and two kinds of the 2D-ESSH also improve the effective Young’s modulus with the appropriate parameters while ensuring the lightweight.



中文翻译:

有效杨氏模量和泊松比为负的新型2D星形蜂窝

本文提出了三种新型的二维增强星形蜂窝(2D-ESSH),它们由二维星形蜂窝(2D-SSH)和增强棒组成。推导了2D-SSH和三种2D-ESSH的相对密度。通过有限元模拟和压缩实验研究了提出的新型2D-ESSH的力学性能。有效长度,外单元壁的角度,外单元壁的厚度,内单元壁的角度以及内单元壁的厚度对有效泊松比和有效杨氏模量的影响结构进行了详细探讨。

更新日期:2021-01-11
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