高密度芳纶纸蜂窝在飞机客舱及货舱地板上应用广泛,对其制作工艺和力学性能的研究具有重要意义。将树脂微观形貌与蜂窝宏观性能结合,研究了3种高密度蜂窝力学性能存在差异的原因,对比分析了芳纶纸蜂窝、聚甲基丙烯酰亚胺(PMI)泡沫和铝蜂窝作为复合材料夹层结构用芯材的优缺点。结果表明:高密度芳纶纸蜂窝的力学性能和节点胶柱面积均随着密度的增大而增大,其力学性能优于PMI泡沫,耐腐蚀性能和抗屈曲性能优于铝蜂窝,但高密度芳纶纸蜂窝工艺控制困难,在制备过程中易出现树脂分布不均匀的现象。
High-density aramid paper honeycomb is widely used in the aircraft cabin and cargo floor.The study on production process and mechanical properties has important significance.The micro-morphologies and mechanical properties of resin were performed to study the reasons for the mechanical properties difference for three specifications of high-density honeycombs.The advantages and disadvantages of aramid paper honeycomb,PMI foam and aluminum honeycomb as the core material of sandwich structure were compared.The results showed that both the mechanical properties and node resin form area of honeycomb were increased as the density increased.The mechanical properties of honeycomb were better than of PMI foam,Resistance to corrosion and local buckling of honeycomb were better than aluminum honeycomb.However,the problem was hard to control the process and easy to appear the phenomenon of uneven distribution of resin during manufacture.
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