SiC纤维增强整体叶环破裂转速研究  

Burst rotation speed of SiC fiber reinforced bling

作　　者：胡强 胡智波 米栋 宣海军[2] HU Qiang;HU Zhi-bo;MI Dong;XUAN Hai-jun(Department of Naval Equipment of PLA,Beijing 100841,China;School of Power Engineering,Zhejiang University,Hangzhou 310027,China;AECC Hunan Aviation Powerplant Research Institute,Zhuzhou 412000,China)

机构地区：[1]中国人民解放军海军装备部,北京100841 [2]浙江大学能源工程学院,杭州310027 [3]中国航发湖南动力机械研究所,湖南株洲412000

出　　处：《燃气涡轮试验与研究》2019年第6期36-40,共5页Gas Turbine Experiment and Research

摘　　要：为研究航空发动机SiC纤维增强钛合金整体叶环的强度,采用有限元法计算了整体叶环子午截面的周向应力分布,分析了其承载模式和理论破裂转速,然后通过高速旋转台试验测定了整体叶环的实际破裂转速。研究结果表明,以复合材料的局部最大周向应力计算的整体叶环的破裂转速与实际测试结果最为接近。叶环残骸断口SEM照片显示,超速旋转过程中首先发生了SiC纤维丝与钛合金基体的界面分脱,随后纤维丝被拉断导致复合材料承载能力下降,最终引起整体叶环的破裂。To study the strength of SiC fiber reinforced bling for aero-engine,finite element method was ad⁃opted to obtain the circumferential stress distribution of bling meridional plane.Load-carrying mode and theoretical burst speed were analyzed;and the actual burst speed was obtained by the high-speed spin tes⁃ter.It is indicated that the burst speed calculated by the local maximum circumferential stress of composite material is closest to the actual test results.SEM photo of fracture shows that during the overspeed process,SiC fiber thread pull off from the interface of titanium alloy matrix at first,then the fiber was broken,which induced the decreasing of carrying capacity for composite material and the burst of bling.

关 键 词：航空发动机 整体叶环 复合材料 破裂转速 有限元法 

分 类 号：V231.95[航空宇航科学与技术—航空宇航推进理论与工程]