Abstract

Honeycomb has been widely used as an excellent energy absorbing material. Honeycombs with different cell structures have been studied. In this research, a type of honeycomb with cells resemble to bitubular structures is proposed and named as bicellular honeycomb. Based on the basic folding mechanism, the theoretical prediction formula of axial compression strength of the bicellular honeycomb was deduced. A method of obtaining different strengths by removing part of inner cells was proposed and the corresponding calculation formula was derived too. The finite element model of the honeycomb was also established. The comparison between theoretical results and simulation results shows the credibility of the theoretical prediction. The effect of cell angle θ₁ and θ₂, the ratio of wall thickness to length t₁/l₁ and t₂/l₂, the ratio of outer cell length to inner cell length l₁/l₂, the ratio of outer cell thickness to inner cell thickness t₁/t₂ is investigated according to the theoretical prediction.

摘要

蜂窝已被广泛用作优良的能量吸收材料。已经研究了具有不同蜂窝结构的蜂窝。在这项研究中，提出了一种细胞类似于管状结构的蜂窝，并命名为双细胞蜂窝。基于基本折叠机理，推导了双孔蜂窝体轴向抗压强度的理论预测公式。提出了一种通过去除部分内胞获得不同强度的方法，并推导出了相应的计算公式。还建立了蜂窝的有限元模型。理论结果与仿真结果的对比表明了理论预测的可信度。单元角θ ₁和θ _2的影响, 壁厚与长度的比率t ₁ / l ₁和t ₂ / l ₂ , 外单元长度与内单元长度的比率l ₁ / l ₂ , 外单元厚度与内单元厚度的比率t ₁ / t ₂根据理论预测进行研究。