Transverse shear stiffness of thickness gradient honeycombs
Transverse shear stiffness of thickness gradient honeycombs
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DOI：
10.1016/j.compscitech.2010.02.007
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发表时间：
2010-06
影响因子：
9.1
通讯作者：
C. Lira;F. Scarpa
中科院分区：
文献类型：
--
作者：
C. Lira;F. Scarpa
本文描述了一种新型的梯度蜂窝结构的横向剪切刚度。与传统的蜂窝结构相反，梯度蜂窝的特点是其单元单元的元素在整个蜂窝面板上具有规则的几何变化。单元的细分不是周期性的，而是由相邻单元之间的几何约束决定的。利用实验数据和有限元模型描述了壁厚沿壁板呈线性增加的梯度蜂窝结构。蜂窝结构的梯度行为提供了额外的复杂性，并提供了定制设计属性的可能性，例如单位重量的刚度。有限元计算结果与实验结果吻合较好，蜂窝剪切模量值的最大百分误差为7%。
This paper describes the transverse shear stiffness of a novel topology of gradient honeycomb structures. Opposite to classical honeycomb configurations, gradient honeycombs feature elements of their unit cells with a regular geometry variation across the whole honeycomb panel. The tessellation of the cells is not periodic, but is dictated by geometric constraints between adjacent units. Gradient honeycombs with wall thickness linearly increasing along the panel are described using experimental data and Finite Element models. The gradient behaviour of the cellular structure provides additional complexity, and the possibility of tailoring design properties, such as the stiffness per unit of weight. We observe a good agreement between the Finite Element and the experimental results, with maximum percentage errors <7% for the shear moduli of the honeycombs.