连续玻纤增强聚丙烯片材复合蜂窝板材制备及力学性能研究

Research of Preparation Process and Mechanical Properties of Continuous Glass Fiber Reinforced Polypropylene Sheet Composite Honeycomb Panel

连续纤维增强热塑性蜂窝夹层结构以其高强轻质、可回收利用等性能成为新型复合材料。采用模压成型工艺,制备连续玻纤混编纱层合片材复合蜂窝板、连续玻纤单向片材复合蜂窝板及连续玻纤交叉片材复合蜂窝板,通过对热压温度、热压压力、保压时间的分析研究,确定优选的成型工艺。通过实验研究了面板结构参数、蜂窝芯结构参数对复合蜂窝板平压性能、弯曲性能及侧压性能的影响。实验表明,同种蜂窝芯条件下,蜂窝夹层板的平压性能与面板类型、层数无关;其弯曲性能先随层数增加而增大,当面板达一定层数,其弯曲性能趋于平稳;侧压性能则随面板层数增加而递增。蜂窝芯壁厚减小以及孔径增大,则使得复合蜂窝板的三类性能呈下降趋势。

With high strength and light weight and recyclable properties, continuous fiber reinforced thermoplastic honeycomb sandwich structure has become a new type of composite materials. Continuous glass fiber yarn mixed laminated sheet composite honeycomb panel, continuous fiber unidirectional plate composite honeycomb panel and continuous fiber cross sheet composite honeycomb panel were prepared by mould pressing technology. The influence of hot pressing temperature, molding pressure and hot dwell time were researched to obtain the best process. The impact of compression, bending and lateral pressure performance of honeycomb panel with different parameters of panel and honeycomb core was researched. The studies show that with the same honeycomb core, the compress performance of the honeycomb sandwich panel has nothing to do with the type and layers of the panel. The bending performance is improved with the increase of the layers first, but when the panel reaches certain layers, it remains unchanged. With the increase in panel layers, the lateral pressure performance increases gradually. With decreasing honeycomb core wall thickness and increasing aperture, the three performances of the honeycomb panel are on the decline.