连续碳纤维增强热塑性复合材料可回收火箭壳体制造关键技术及应用进展

Advances Manufacturing Technologies of Continuous Carbon Fiber-Reinforced Thermoplastic Composites for Reusable Rocket Casings

  • 摘要: 随着运载火箭向轻量化、高可靠和可回收方向发展,壳体作为箭体的重要承载结构,对结构减重、制造质量和重复服役可靠性提出了更高要求。连续碳纤维增强热塑性复合材料具有高比强度、高比刚度、可焊接及成形效率高等特点,为可回收火箭壳体的轻量化设计和高效制造提供了新的技术途径。近年来,随着原位加热、自动缠绕及机器人制造技术的发展,连续碳纤维增强热塑性复合材料在复杂壳体结构制造中的应用潜力不断提升。然而,高性能热塑性树脂熔融温度高、成形温度窗口窄,原位成形过程中温度、压力、张力和运动状态相互耦合,易引起界面结合不足、孔隙缺陷及纤维铺放失稳等问题。同时,复杂壳体的连续缠绕、成形质量在线监测以及高自由度自动化制造仍缺乏成熟的工艺与装备支撑,制约了其在可回收火箭壳体中的工程应用。基于此,本文围绕连续碳纤维增强热塑性复合材料可回收火箭壳体制造过程中的稳定固结、精准缠绕、质量控制和复杂结构成形等关键问题,系统梳理了材料成形机理、原位制造工艺、装备与轨迹规划技术以及先进复合成形方法的研究进展,分析现有技术在成形稳定性、制造精度、过程感知和复杂结构适应性等方面存在的主要瓶颈,并对原位制造智能化、质量闭环控制及复杂壳体高效自动化成形的发展方向进行展望,为连续碳纤维增强热塑性复合材料可回收火箭壳体制造技术的发展及工程应用提供参考。

     

    Abstract: With the development of launch vehicles toward lightweight design, high reliability, and reusability, rocket casings, as critical load-bearing structures, are subject to increasingly stringent requirements for structural weight reduction, manufacturing quality, and reliability under repeated service. Continuous carbon fiber-reinforced thermoplastic composites offer high specific strength and stiffness, weldability, and high forming efficiency, providing a new technological route for the lightweight design and efficient manufacturing of reusable rocket casings. In recent years, advances in in situ heating, automated filament winding, and robotic manufacturing have substantially increased the potential of continuous carbon fiber-reinforced thermoplastic composites for manufacturing complex casing structures. However, high-performance thermoplastic matrices generally exhibit high melting temperatures and narrow processing windows, while temperature, compaction pressure, fiber tension, and machine motion states are strongly coupled during in situ forming, which can lead to insufficient interfacial bonding, void defects, and unstable fiber placement. Moreover, continuous winding of complex casings, online monitoring of forming quality, and highly flexible automated manufacturing still lack sufficiently mature processes and equipment, thereby restricting the engineering application of these composites in reusable rocket casings. Accordingly, this review focuses on the key manufacturing issues of stable consolidation, accurate winding, quality control, and complex-structure forming for reusable rocket casings made of continuous carbon fiber-reinforced thermoplastic composites. Research progress in material forming mechanisms, in situ manufacturing processes, forming equipment and winding trajectory planning, as well as advanced hybrid forming technologies, is systematically reviewed. Major limitations in forming stability, manufacturing accuracy, process monitoring, and adaptability to complex structures are analyzed, and future directions toward intelligent in situ manufacturing, closed-loop quality control, and efficient automated forming of complex casings are discussed. This review is expected to provide a reference for the development and engineering application of manufacturing technologies for reusable rocket casings made of continuous carbon fiber-reinforced thermoplastic composites.

     

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