大厚度复合材料曲面典型构件的工艺优化

Process optimization of typical composite cambered components with large thickness

大厚度复合材料的数值仿真存在缺乏实尺度验证、数值模型待优化等问题。本文针对真空辅助树脂传递模塑成型的大厚度复合材料曲面构件,通过大型风电叶片主梁的工艺仿真与实尺度实验验证,进行了工艺设计与工艺参数模型预测。首先对比研究了不同的工艺仿真方案;然后利用所选优化方案对树脂灌注方案进行工艺设计,并进行了实验验证;最后,提出了不同厚度制件的工艺参数预测模型。结果表明:所选优化方案可同时得到理想的计算效率和流动模拟结果;所设计工艺方案与实验吻合性良好;工艺参数预测模型所得结果与模拟结果基本一致。

There are critical limitations in numerical simulation of large-thickness composite materials, including lack of real-scale verifications and numerical model to be optimized. In this paper, the process design and model prediction of process parameters were carried out for the large-thickness composite curved cambered component formed by vacuum assisted resin transfer molding through process simulation and experimental verification.Firstly, different process simulation schemes were compared and studied. Then the optimum scheme was used to design the process of the resin infusion, and the experimental verification was carried out. Finally, the process parameter prediction model of different thickness parts was proposed. The results show that the optimal scheme can obtain ideal computational efficiency and flow simulation results simultaneously. The simulation results of the designed process scheme are in good agreement with the experiments. The results obtained by the process parameter prediction model are basically consistent with the simulation results.