吸胶膜对复合材料构件固化过程中树脂流动行为的影响

发布时间：2018-05-22 09:08

本文选题：复合材料 + 固化压实　；参考：《玻璃钢/复合材料》2017年07期

【摘要】：热固性树脂基复合材料构件成型过程中的树脂流动行为决定了其最终成型后的纤维体积分布情况,严重影响构件的最终成型质量。而吸胶膜作为预浸料中的多余树脂流出构件后的吸收载体,其材料特性对树脂的流动过程起主导作用。以吸胶膜为关注重点,基于AS4/3501-6复合材料体系,建立了厚截面复合材料构件在热压罐中固化压实的仿真模型,模型包括了固化反应、热传导和紧密压实三个模块。模型与实验中构件的压实情况对比,验证模型的可行性。通过模型计算结果研究了吸胶膜的孔隙率、渗透率及厚度等关键参数在压力、温度等工艺条件的协同作用下对树脂流动行为的影响规律。结果表明:吸胶膜的孔隙率和厚度作为吸收树脂载体的空间度量,对构件的最终压实厚度起主要作用;吸胶膜的渗透率通过树脂流动速度影响固化压实过程,渗透率过小时,构件的压实厚度明显减小。
[Abstract]:The flow behavior of resin in the molding process of the thermosetting resin matrix composite determines the volume distribution of the fiber after the final molding, which seriously affects the final molding quality of the component, and the adhesive film is used as the absorption carrier of the excess resin in the prepreg, and its material properties play a leading role in the flow process of the resin. Taking the adhesive film as the focus, based on the AS4/3501-6 composite material system, the simulation model of the thick section composite member solidified in the hot pressing tank is established. The model includes three modules, namely, curing reaction, heat conduction and compact compaction. The model is compared with the compaction of the components in the experiment to verify the feasibility of the model. The effect of the porosity, permeability and thickness of the adhesive film on the flow behavior of the resin under the synergistic effect of pressure and temperature is studied. The results show that the porosity and thickness of the film are the spatial measurement of the absorption resin carrier, and the main effect of the final compaction thickness of the components; the infiltration of the adhesive film. The penetration rate affects the solidification process through the flow velocity of resin, and the compaction thickness of the component decreases obviously after the permeability is too small.
【作者单位】：中南大学机电工程学院;
【基金】：国家“973”项目(2014CB046500)
【分类号】：TB33

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