基于“离位”增韧技术Z向注射RTM成型的浸润研究

发布时间：2018-06-08 19:04

本文选题：“离位”增韧 + 非稳态浸润　；参考：《材料工程》2017年09期

【摘要】：针对"离位"增韧技术和Z-RTM成型技术,引入饱和度参数修正Darcy定律,建立描述树脂在纤维预制件中非稳态流动的偏微分方程,研究恒流注射过程中体积流量、树脂黏度和纤维预制件渗透率等工艺参数对非稳态浸润过程注入压力的影响,模拟树脂在层间未增韧和增韧纤维预制件束内和束间的流动。结果表明:数值模拟结果具有可靠性;随着注射时间的增加,纤维预制件内部各点的压力增加;随着体积流量、树脂黏度的增加,注入压力线性增加,而随着纤维渗透率的增加,注入压力减少,符合Darcy定律;实现了树脂在纤维预制件细微观层次浸润的可视化,这种可视化结果为预测树脂在预制件中的宏观流动提供了重要补充,并为实际工艺提供了一定指导作用。
[Abstract]:In this paper, the partial differential equation describing the unsteady flow of resin in fiber preforms is established by introducing saturation parameters to modify Darcy's law for "off-position" toughening technology and Z-RTM molding technology, and the volume flow rate in constant flow injection process is studied. The effects of resin viscosity and fiber preform permeability on the injection pressure during the unsteady soaking process were studied to simulate the flow of resin in and between bundles of untoughened and toughened fiber preforms. The results show that the numerical simulation results are reliable; with the increase of injection time, the internal pressure of fiber preforms increases; with the volume flow rate, the viscosity of resin increases, the injection pressure increases linearly. With the increase of fiber permeability, the injection pressure decreases and Darcy's law is obeyed. The visualization results provide an important supplement to predict the macroscopical flow of resin in preforms, and also provide some guidance for the actual process.
【作者单位】：山东理工大学材料科学与工程学院;中航复合材料有限责任公司复合材料中心;济南大学材料科学与工程学院建筑材料制备与测试技术重点实验室;山东大学材料液固结构演变与加工教育部重点实验室;
【基金】：国家自然科学基金(51173100,51373090) 山东省自然科学基金(ZR2015QZ05,ZR2014EMQ014,ZR2014JL032)
【分类号】：TB33

【相似文献】