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Equivalent in-plane elastic modulus of honeycomb sandwich in the direction of cell vertical wall
Journal of Sandwich Structures & Materials ( IF 3.9 ) Pub Date : 2021-07-12 , DOI: 10.1177/10996362211023538
DH Chen 1, 2 , XL Fan 2, 3
Affiliation  

The equivalent in-plane elastic modulus (EyS) of a honeycomb sandwich in the direction of cell vertical wall can be assessed by the law of mixture from the modulus of face sheet (Ep) and the equivalent modulus of honeycomb core (EyC). However, significant errors as large as 40% can be made depending on material and geometry parameters, when the used EyC is obtained from a cellular model of core alone without considering the skin effect of face sheet. The main reason of the error is that the rigidity to deformation of y-direction is different greatly between the vertical cell wall of core and inclined cell wall of core. In the present paper, an analytical model is proposed to assess EyS of honeycomb sandwich with considering the interference effect of the core with the face sheet. In the proposed model, the influence of the face sheet rigidity on EyS is taken into account. The results demonstrate that the contribution of the core to EyS is also dependent on the face sheet rigidity significantly. The validity of presented model is verified by comparing the results with numerical results of FEA.



中文翻译:

蜂窝夹层在单元垂直壁方向的等效面内弹性模量

等效面内弹性模量 () 蜂窝夹层在单元垂直壁方向的厚度可以通过面板模量的混合定律来评估 () 和蜂窝芯的等效模量 (C). 然而,根据材料和几何参数,当使用时,可能会产生高达 40% 的重大误差C仅从核心的细胞模型中获得,不考虑面板的趋肤效应。产生误差的主要原因是岩心垂直单元壁和岩心倾斜单元壁对y方向变形的刚度差异很大。在本文中,提出了一个分析模型来评估蜂窝夹层结构考虑芯材与面板的干涉效应。在所提出的模型中,面板刚度对被考虑在内。结果表明,核心对还显着依赖于面板刚度。通过将结果与有限元分析的数值结果进行比较,验证了所提出模型的有效性。

更新日期:2021-07-12
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