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<p>The use of ceramic matrix composite (CMC) in blades is crucial for improving aero-engine performance. However, designing complex fiber architectures while considering manufacturing constraints poses significant challenges for blade design and evaluation. Manufacturing constraints specifically refer to fiber continuity constraints and fiber path curvature constraints. Here, a cross-scale design methodology and a static strength evaluation system for CMC blades were established and subsequently applied to the design of shrouded blades. The cross-scale design method adequately considered the variety and differences in fiber-architecture molding methods. Weaving parameters were optimized through a cost-effective, simulation-driven design. The blade performance and structural integrity were balanced under manufacturing constraints. The developed static strength evaluation system was used to compare the performance of different designs through simulation analysis and critical tests. No defect was found in the CMC blade prototypes after holding a load for 2&#xa0;min at 1.15 times their maximum rotational speed. This demonstrated sufficient static strength and confirmed the effectiveness of the design methodology and evaluation system.</p>

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Design and Static Strength Evaluation of SiC/SiC Turbine Blades Considering Manufacturing Constraints

  • 期刊论文

  • 发表日期：

    2025年6月24日

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  • Chenyang Liu,
  • Sheng Zhang,
  • Xu Zhang,
  • Chengqian Dong,
  • Fang Wang,
  • Xiguang Gao,
  • Yingdong Song

摘要

The use of ceramic matrix composite (CMC) in blades is crucial for improving aero-engine performance. However, designing complex fiber architectures while considering manufacturing constraints poses significant challenges for blade design and evaluation. Manufacturing constraints specifically refer to fiber continuity constraints and fiber path curvature constraints. Here, a cross-scale design methodology and a static strength evaluation system for CMC blades were established and subsequently applied to the design of shrouded blades. The cross-scale design method adequately considered the variety and differences in fiber-architecture molding methods. Weaving parameters were optimized through a cost-effective, simulation-driven design. The blade performance and structural integrity were balanced under manufacturing constraints. The developed static strength evaluation system was used to compare the performance of different designs through simulation analysis and critical tests. No defect was found in the CMC blade prototypes after holding a load for 2 min at 1.15 times their maximum rotational speed. This demonstrated sufficient static strength and confirmed the effectiveness of the design methodology and evaluation system.