Abstract:

In order to solve the problems of excessive consumption time and difficulty keeping high piles vertical  in facesheet-reinforced 3-D spacer fabric composites component(FSFCC) molding process, laying process keeping high piles vertical was presented. Core molds used in  above-mentioned laying process were designed. The special curing method composed of five measures with microwave heating was designed. These measures were as follows: using high thermal conductive and wave-transparent core molds; applying proper curing pressure; using multi-layer dissimilar material mold;using customized microwave oven;adopting multiple ramp rate. FSFCC samples were made on the basis of the molding process. Mechanics properties of experimental FSFCC samples were tested. Flexural stiffness, flatwise compressive strength, flatwise tensile strength and tensile shear strength are 20.0N·m2, 2.2MPa,3.3MPa and 0.60MPa respectively. Making one specimen with size of 30cm×14.5cm only cost 2028 kJ power. So conclusion can be drawn from experimental results that molding process presented herein can be used to make FSFCC with vertical high piles and good mechanics properties at the cost of less energy efficiently.

Key words: hollow integrated sandwich composite, ceramic core mold, microwave co-curing, mechanics property; , curing under pressure

摘要：

针对面板增强中空复合材料构件在复合成形时存在的耗费时间较长及难以保证大高度芯柱直立性的问题,提出了能够保证大高度芯柱直立性的铺放成形工艺并设计了用于该成形工艺的芯模,设计了包含使用高导热透波芯模、施加合适固化压力、采用多层异种材质模具、采用定制微波炉、采用多个升温速率这5个措施的微波加热固化方式。利用上述成形工艺制造实验样件,并测试了样件的力学性能，其中平压强度、剪切强度、弯曲刚度和平拉强度分别为2.2MPa、0.60MPa、20.0N·m2、3.3MPa。制造规格为30cm×14.5cm的样件能耗约2028kJ。实验结果表明所提出的成形工艺能高效低能耗制造出芯柱直立性和综合力学性能较好的面板增强中空复合材料构件。

关键词: 整体中空复合材料, 陶瓷芯模, 微波共固化, 力学性能, 压力固化