软模辅助RTM工艺整体制备复合材料推力筒技术  

Fabricating composite thrust cylinder integrally by thermal expansion mould assisted RTM process

作　　者：杜刚[1] 肖加余[1] 曾竟成[1] 彭超义[1] 

机构地区：[1]国防科学技术大学航天与材料工程学院,长沙410073

出　　处：《复合材料学报》2007年第4期46-50,共5页Acta Materiae Compositae Sinica

基　　金：国家"863"计划项目(2002AA724052)

摘　　要：根据软模热膨胀压力与复合材料推力筒壁厚和复合材料预成型体之间的变化关系,推导出了软模尺寸控制方程,并采用整体浇铸成型技术制备软模。对整体制备出的复合材料推力筒的轴压性能测试结果表明,复合材料推力筒整体力学性能优异,满足设计要求。与传统VARTM工艺相比较,软模辅助RTM能通过软模的膨胀挤胶作用,提高构件的纤维体积分数;通过加压作用,提高构件的致密性和表面质量,最终使其力学性能提高。The size control equation of the thermal expansion mould was derived from the relative relation between the expansion pressure of the thermal expansion mould and the wall thickness of the composite thrust cylinder and the thickness of the preform used for fabricating the composite thrust cylinder. The thermal expansion mould was fabricated by an integrally casting method. The axial compressive experiment on the integrally fabricated thrust cylinder shows that the thrust cylinder has good mechanical properties and satisfies the design specification. Compared with traditional VARTM, the thermal expansion mould assisted RTM process improves the fiber volume fraction by squeezing the resin out through an inflated thermal expansion mould and improves the compactness of the composites by expansion pressure of the mould; therefore the mechanical properties of the composites were increased.

关 键 词：软模工艺 VARTM工艺 复合材料推力筒 轴向压缩 

分 类 号：TB332[一般工业技术—材料科学与工程] V214.8[航空宇航科学与技术—航空宇航推进理论与工程]