基于RTM技术的碳纤维/聚酰亚胺复合材料舵面一体化制备与验证

设计了一种碳纤维/聚酰亚胺复合材料舵面结构，采用PAM-RTM软件模拟了舵面在注胶过程中的树脂流动，根据模拟结果设计了成型模具，并通过树脂传递模塑(RTM)工艺制备了耐高温碳纤维/聚酰亚胺复合材料舵面，对其进行了力学试验，并将三维有限元分析结果与试验结果对比。试验结果表明，碳纤维/聚酰亚胺复合材料舵面在150%的使用载荷下保持了结构的完整性，骨架的最大应变为2 408×10–6，复合材料蒙皮的最大应变为2 371×10–6。有限元分析结果表明，金属骨架的最大应力出现在舵轴根部圆弧过渡区，而碳纤维/聚酰亚胺复合材料蒙皮的最大应力出现在与垫片外圆弧接触处；碳纤维/聚酰亚胺复合材料舵面的初始破坏为蒙皮单向带横向拉伸失效。 

Integration manufacturing and testing verification for RTMable carbon fiber/polyimide composite rudder

The carbon fiber/polyimide composite rudder was designed. And the PAM-RTM software was used to simulate the resin flow of the rudder during the injection process. The forming die was designed according to the simulation results. The high-temperature resistant carbon fiber/polyimide composite rudder was fabricated via resin transfer molding (RTM) process accordingly and the mechanical properties under bending load were investigated to compare with the 3D finite element analysis (FEA) results. The experimental results show that the carbon fiber/polyimide composite rudder maintains the structural integrity under 150% of the service load. The maximum strain of the metal skeleton is 2 408×10–6, and the maximum strain of the carbon fiber/polyimide composite skin is 2 371×10–6. The FEA results reveal that the maximum stress of the metal skeleton appears at the arc transitional region of the rudder shaft root, while the maximum stress of the carbon fiber/polyimide composite skin emerges in the resin junctional area of the gasket outer arc. The initial damage of the carbon fiber/polyimide composite rudder is the transverse tensile failure of the skin unidirectional tape.