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在VIP(Vacuum Infusion Process)工艺中,零件的最终厚度也即是零件的纤维体积含量因单面模具和柔性真空袋的使用而部分地取决于预成型体的压缩响应。本文研究了不同织物在干态实验或者湿态实验时的压缩响应,分析了真空度、预成型体反复加卸压、铺层设计、织物种类和树脂粘度等主要参数对纤维压缩性能的影响。通过具体实验分析讨论了纤维的嵌套和弹性回复、树脂的润滑、纤维间的摩擦作用等内在因素的影响。最后,对高渗透层渗透率与纤维预成型体渗透率间的匹配关系做了进一步的研究。
In the VIP (Vacuum Infusion Process) process, the final thickness of the part, ie, the fiber volume content of the part, depends in part on the compression response of the preform due to the use of single-sided molds and flexible vacuum bags. In this paper, the compressive response of different fabrics under dry or wet conditions was studied. The effects of vacuum degree, repeated depressurization of preform, laying design, fabric type and resin viscosity on the compressibility of fiber were analyzed. The effects of internal factors such as fiber nested and elastic recovery, resin lubrication and friction between fibers were discussed through concrete experiments. Finally, the relationship between the permeability of high permeability layer and the permeability of fiber preform has been further studied.