z向流动RTM工艺树脂的流动浸润行为  

Investigation of resin flowing and infiltration behavior during z direction flowing RTM process

作　　者：李伟东[1] 刘刚[1] 安学锋[1] 益小苏[1] 

机构地区：[1]北京航空材料研究院先进复合材料重点实验室,中航工业复合材料技术中心,北京100095

出　　处：《复合材料学报》2013年第6期82-89,共8页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(51203144;51103121);航空科学基金(20115221003;20125268002);国家973计划(2010CB631101)

摘　　要：研究了层间"离位"附载多孔薄膜结构形式增韧层的大厚度纤维预成型体中等代流体(树脂)沿预成型体厚度方向(z向)的流动行为,通过压力传感器监测z向流动RTM(z-RTM)工艺注射过程中进、出胶口压力的变化规律,进一步反推树脂在层间"离位"增韧与非增韧预成型体中的宏观流动及微观浸润模式。结果表明,在zRTM工艺注射过程中,树脂在沿纤维束间z向快速流动的同时完成对纤维丝束内部的浸润。层间"离位"附载的增韧层虽延缓了树脂的宏观流动,但使流动前锋曲面更加平滑。层间"离位"增韧预成型体z向渗透率为3.5×10-15 m2,与非增韧预成型体的z向渗透率2.9×10-14 m2相比,降低约一个数量级。The flowing and infiltration behaviors of the equivalent fluid （resin）, which passed through the thickness direction （z direction） of large thickness un-toughened and ＂ex-situ＂ toughened preforms were studied. The pressure variation of inlet and outlet pot were monitored respectively by pressure transducers during z direction flowing RTM （z-RTM） process. Based on the pressure curves, the macro-flowing and micro-infiltrition behaviors of the ＂resin＂ inside the ＂ex-situ＂toughened preforms and untoughened preforms were deduced. The results show that the resin flow along the z direction between the gap of fiber bundles and at the same time infiltrated the intra fiber bundles during the injection stage of z-RTM process. The ＂ex-situ＂ toughener will delay the resin macro-flowing, however the resin flow front will be smoothed by the interlaminar toughener. Compared with the un-toughened preform, the introducing of interlaminar toughening agent reduces the z-direction permeability of the preform from 2.9×10-14m2 to 3.5×10-15m2.

关 键 词：z向流动 树脂传递模塑 预成型体 “离位”增韧 渗透率 

分 类 号：TB332[一般工业技术—材料科学与工程]