气囊辅助RTM工艺成型导弹舱段构件

Missile cabin fabrication by bladder-assisted RTM

导弹舱段构件尺寸较大且内部结构复杂,无法通过传统树脂传递模塑(Resin transfer molding,RTM)工艺一次整体成型。本文中利用气囊辅助RTM工艺成功整体成型了导弹舱段,该工艺无需金属芯模,模具轻便,充压气囊对构件压实效果显著。研究结果表明,气囊辅助RTM工艺成型的舱段性能较传统RTM工艺成型的舱段有明显提高,试样纤维体积分数达到了61%,拉伸强度和弯曲强度分别比传统RTM工艺制备的同种试样提高了25%和26%,舱段构件的整体极限轴压载荷与极限弯曲载荷分别达到指标值的130%和132%。

The missile cabin is unable to be fabricated by normal RTM （Resin transfer molding） in one step for its large size and complicated internal structure. The bladder assisted RTM was used to fabricate the missile cabin in this paper. This process does not need a metal mandrel, the whole mold is light and the component consolidation is apparent by the inflated bladder pressure. The results show that the fiber volume fraction of the specimen formed by bladder assisted RTM reaches 61%, and the tensile strength and the flexural strength are improved by 25% and 26% respectively compared to that by normal RTM. The missile cabin ultimate axial compression load and ultimate flexural load reach 130% and 132% of the target ultimate load.