Nomex蜂窝夹层结构真空袋共固化过程蜂窝变形

针对蜂窝夹层板的共固化工艺，以玻璃纤维120斜纹织物/环氧5224体系为面板，以Nomex蜂窝为夹芯材料，研究了蜂窝侧向抗压刚度的影响因素,并通过自行建立的成型过程气压测试装置，分析了芯材内压的影响因素及蜂窝的变形情况。结果表明：对于孔格边长和芯材高度较大的情况,蜂窝侧向抗压能力较小，在真空压力的作用下容易发生变形；芯材内压与芯材内气体的膨胀和预浸料铺层的渗透性直接相关，因此芯材内压受温度制度、预浸料层数和胶膜影响较大；芯材内压对抵抗蜂窝变形起到重要作用，预浸料凝胶前较大的芯材内压有利于抑制蜂窝变形的发生。

Core crush of Nomex honeycomb sandwich structure during cocuring process with vacuum bag

By using glass fiber 120 twill fabric/epoxy 5224 as the panel and Nomex honeycomb as the core,the ability of resisting the lateral distortion of honeycomb cores was investigated.For cocuring process with the vacuum bag,a gas pressure measuring method was established and was used to study the influence factors of core internal pressure and the relationship between core internal pressure and core crush.It is found that the ability of the honeycomb core to avoid core crush is limited,especially for large core ...