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中文摘要：
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 z-RTM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3.5×10-15m2，与非增韧预成型体的z向渗透率2.9×10-14m2相比，降低约一个数量级。
英文摘要：
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.
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