复合材料副翼典型结构件的VARI工艺模拟及试验验证

Flap Structural Composites VARI Fluid Process Molding Simulation Technology and Experiments Validation

在复合材料液体成型工艺过程中,通过计算机软件的模拟研究,可以预先判断树脂在增强体中的流动形式和获得树脂的注模时间以及注模压力,进而为实际成型工艺提供参考设计。本文利用PAM-RTM模拟软件对复合材料副翼典型结构件的树脂流动过程进行了模拟计算。根据达西定律推导出树脂在增强纤维中一维流动渗透率计算公式,分别对增强纤维、缝线纤维进行了渗透率测试,在此基础上对渗透率数值进行了修正。利用渗透率修正值采用不同的流道设计方案对树脂注模过程进行了模拟研究,根据模拟结果最终选择合理的注射方式和流道布局。对所选方案进行了工艺试验验证,并对结构件进行了超声无损检测。结果显示:理论充模时间和试验充模时间基本一致,结构件没有内部缺陷,树脂填充完全,模拟工艺计算有效。

In the process of composites fluid molding,the filling time and pressure of resin can be forecasted with using computer-aided simulation software,which can provide reference design for the real molding process of resin flow.The simulation of the resin flow had been carried out for flap structural composite by using PAM-RTM software.According to the Darcy’s law,the formula of permeability was deduced when the resin flow along reinforce fiber.The permeability of carbon fiber and suture fiber was tested and revised respec-tively.The simulation of the resin flow was carried out by using several runner means.The final reasonable injection port and runner were chosen according to simulation results.The chosen means were verified by the process experims,also the structural component was tested by using ultrasonic nondestructive testing.The results show that the theoretical filling time is almost consistent with the fill-ing time measured by the experiments.It is not found that the internal defect is existed in structural components.The resin filling is e-nough,to prove that the simulation is valid.