Nomex蜂窝夹层复合材料的成型工艺研究

针对Nomex蜂窝填充双马树脂基复合材料夹层结构在固化成型过程中易出现的蜂窝芯边缘塌陷问题进行研究。通过采用不同的成型工艺方法,以及对共固化工艺参数进行调整,研制出相应的双马来酰亚胺树脂基碳纤维/蜂窝夹层结构层板,并且对夹层结构的力学性能、内部质量以及平面拉伸性能进行测试。在此基础上分析了成型压力参数对夹层结构质量的影响。相关工艺试验表明蜂窝芯塌陷的原因主要是固化过程中蜂窝芯边缘的滑移引起的蜂窝局部失稳,通过采取分步成型、蜂窝先胶接后修型的方法能够有效地解决Nomex蜂窝夹层结构填充双马树脂基复合材料结构成型过程中的蜂窝芯塌陷问题。

STUDY ON THE FORMING PROCESS OF COMPOSITES FILLED WITH NOMEX HONEYCOMB SANDWICH STRUCTURE

In this paper,the edge dent is easily appeared in the curing process of bismaleimide resin matrix composite sandwich structure filled with Nomex honeycomb.The bismaleimide resin based carbon fiber laminate/honeycomb sandwich structures were developed by using different curing process,during which the co-curing process parameters were adjusted.The mechanical properties,internal quality and tensile properties of the sandwich structure were tested,based on which the influence of molding pressure on the sandwich structure quality was analyzed.The processing experiment shows that the edge dent of honeycomb core is mainly attributed to the local instable of honeycomb core resulted from the edge slipping of honeycomb core,during the cured process.It can be effectively solved by the method of step curing method and molding after bonded method of Nomex honeycomb core.