航空发动机陶瓷基复合材料疲劳迟滞机理与模型研究进展

对陶瓷基复合材料疲劳迟滞机理与模型的研究进展进行综述。首先,简要回顾了陶瓷基复合材料在航空发动机上的应用情况,综述了单向、铺层和编织陶瓷基复合材料细观疲劳失效模式与疲劳迟滞机理。总结出纤维增强陶瓷基复合材料基本的细观失效模式是:基体裂纹、纤维/基体界面脱粘和纤维断裂、铺层陶瓷基复合材料中的铺层/铺层界面脱粘以及编织陶瓷基复合材料中的纱线/纱线界面和纱线/基体界面脱粘。脱粘后的各类界面在循环载荷下的界面滑移是导致疲劳迟滞行为的根本原因。然后,详细分析了陶瓷基复合材料疲劳迟滞行为力学建模研究历史与现状,指出了其中存在的问题。最后,对陶瓷基复合材料疲劳迟滞行为研究的发展趋势进行了展望。

Progress on Fatigue Hysteresis Mechanisms and Models of Aero-engine Ceramic Matrix Composites

Progress on the fatigue hysteresis mechanisms and models of ceramic matrix composites is reviewed. The application of ceramic matrix composites on the aero-engines is introduced first. The microscopic failure modes and fatigue hysteresis mechanisms of unidirectional, laminated and braided ceramic matrix composites are then discussed, including the general matrix cracking, the fiber/matrix interfacial debonding and fiber fracture for these three types of composites, the laminate/laminate interfacial debonding for laminated ceramic matrix composites, and the yarn/yarn and yarn/exterior matrix interfacial debonding for braided ceramic matrix composites. The primary cause of the fatigue hysteresis behavior is the interfacial sliding under cyclic loading after the dedonding of these interfaces. Finally, progress on the hysteresis models is also reviewed and the development direction is pointed out.