Review of ceramic matrix composites and metal junction structures
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摘要:
系统综述了航空发动机燃烧室与涡轮导向叶片应用场景下陶瓷基复合材料(ceramic matrix composites,CMCs)与金属连接结构的结构设计方法、数值模拟与试验验证、具体应用三个方面。文献分析表明,当前研究主要围绕4类热失配协调策略展开:过渡区域配合、间隙设计、互锁配合与热适配螺栓;广泛采用多尺度建模与渐进损伤分析的仿真方法以及阶梯式试验验证体系;具体设计形式因不同应用场景工况下存在差异。结论认为,未来技术发展应致力于多种设计策略的混合应用,并从部件级的连接点设计转向系统级的热-力-冷却多功能协同设计,以最终实现连接结构长时可靠服役。
Abstract:The ceramic matrix composites (CMCs) and metal connection structures in aero-engine combustion chambers and turbine guide vanes were systematically examined, covering structural design, numerical simulation, and experimental validation. Current studies put focus on four thermal mismatch mitigation strategies: transition region coordination, clearance design, interlocking fit, and thermal stress-free fastener. Multi-scale modeling and progressive damage analysis were widely employed in simulations, alongside a stepwise experimental verification framework. Structural configurations varied with specific application scenarios and operational conditions. Future development should combine multiple design strategies and shift from component-level connection design to system-level thermo-mechanical-cooling multifunctional coordinated design, so as to ensure long-term structural reliability under extreme conditions.
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表 1 CMCs-金属连接结构数值模拟典型案例
Table 1. Typical cases of numerical simulation of CMCs-metal connection structures
研究者 研究对象 关键仿真方法 主要研究结论 赵淑媛等[41]/
阙权庆[45]C/SiC-GH4169单螺栓单搭接 Tsai-Wu失效准则,刚度折减 高温下预紧力大幅下降;CMC板间隙减小,
金属板间隙增加赵淑媛等[42] C/SiC-GH4169双螺栓单搭接 Alvaro准则,Tan退化模型 孔边距存在最优值(约为15 mm),使承载
能力最大;板宽变化导致失效模式改变韩笑[46] SiCf/SiC-GH4169单螺栓 多尺度建模,虚拟材料法 初始预紧力存在最优区间(对应扭矩为
10 N·m),过高会导致CMC初始损伤Zhao 等[44] C/SiC多钉连接 Hashin准则,组合退化模型 Hashin准则与组合退化模型联合使用,
与常温拉伸试验结果吻合最佳Li等[43] C/SiC多钉连接 最大应力准则 修正理论模拟能够有效预测不同连接方式
(误差小于等于13%) -
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