Theoretical, numerical and experimental analysis of three-dimensional double-V honeycomb
Theoretical, numerical and experimental analysis of three-dimensional double-V honeycomb
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DOI：
10.1016/j.matdes.2017.11.024
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发表时间：
2018-02-05
影响因子：
8.4
通讯作者：
Wang, Yuanlong
中科院分区：
文献类型：
--
作者：
Gao, Qiang;Wang, Liangmo;Wang, Yuanlong
本文描述了由负泊松比的二维双V结构包围的三维双V蜂窝结构的力学性能。考虑相邻单元格的影响，从理论上推导了蜂窝在轴向载荷作用下的泊松比和杨氏模量。通过对三维双V蜂窝结构的有限元分析，验证了理论解的正确性。结果表明，相邻单元的约束对材料的负泊松比没有影响，但对材料的杨氏模量有很大的提高，这两个性质由填充角/张量角决定。然后，制作了三维DVH样机，进行了准静态实验。将理论解、数值解和实验解的刚度和破坏应力进行了比较，结果表明三者吻合较好，说明理论解的分析是可信的。准静态破坏应力随张量角θ（1）的增大和填充角θ（2）的减小而增大。(C)2017爱思唯尔有限公司版权所有
This paper describes the mechanical properties of the three-dimensional(3D) double-V honeycomb intersected by a two-dimensional double-V structure with negative Poisson's ratio. Considering the effect of the adjacent unit cells, the Poisson's ratio and Young'smodulus of the honeycomb under axial loading are derived theoretically. The finite element (FE) model of the 3D double-V honeycomb (DVH) is conducted to verify the theoretical solutions. It is found that the constraint of the adjacent cells does not affect the negative Poisson's ratio but enhance Young'smodulus a lot, and the two properties are determined by the stuffer/tensor angles. Then, the prototypes of the 3D DVH is manufactured to carry out the quasi-static experiments. The stiffness and the collapse stress of the theoretical, numerical and experimental solutions are compared, and it is evident that these results agree very well which indicates the analyses of these solutions are convinced. And the quasi-static collapse stress increases with the increment of tensor angle theta(1) and the reduction of stuffer angle theta(2). (C) 2017 Elsevier Ltd. All rights reserved.