复合材料螺旋桨RTM成型工艺研究

Research on RTM molding process of composite propeller

为开展复合材料螺旋桨成型工艺的研究,分析了不同成型工艺的特点,提出采用树脂传递模塑成型技术(RTM)制作螺旋桨模型,制订了模具制备方案、纤维剪裁和铺层实施方案以及RTM工艺流程,制作了螺旋桨模型,并提出了工艺改进方案,进而开展了螺旋桨模型的强度试验.强度试验结果显示:随着载荷的增加,各测点处的应变值均呈线性增长,当加载到8 k N时各测点应变均在弹性范围内,桨叶未发生破坏.研究表明:采用本文制定的模具制备方案,特别是针对桨叶纤维布剪裁、铺层的难题提出的适合复杂型线纤维布剪裁和铺层的实施方案,用于成型夹芯复合材料螺旋桨模型可以满足预期强度要求,验证了本文工艺的可行性.

To study composite propeller molding process, we analyze the characteristics of different molding process and propose to the propeller modelby using RTM technology. Then, we develop programs for mold preparation, fiber cut and ply embodiment and RTM process. And we produced a propeller modeland then launched a strength test propeller models. The mechanical test results show that, there is a linear increase for the strain with the load increase and blade is not damaged when 8 kN load was exploited. The use of mold preparation program developed, especially for problem blade cut fiber cloth, plies of embodiment for complex type wire cloth cut and laminate for molding sandwich composite propeller model to meet the expected strength requirements to verify the feasibility of the process herein.