航空发动机增材制造结构强度、寿命评估与设计：研究现状及展望

The application status of additive manufacturing technology in aero-engine was introduced, and the key technologies of strength, lifetime assessment and design methods for additive manufacturing structures in aero-engine were emphatically reviewed. The shortcomings and development trends of existing research were discussed in terms of nondestructive detection methods and equivalence criteria for additive manufacturing defects, strength and lifetime prediction methods considering the effects of defects, and the integrated innovative structure design technology of aero-engine additive manufacturing structures, respectively. The results showed that strength and life assessment of additive manufacturing structures in aero-engine was at the initial stage. Most of them were geared for the additive manufacturing materials and simple structures under a single failure mode, making it necessary to conduct research on compound fatigue failure, multi-factor failure coupled of structural characteristics-widespread defects-surface morphology, so as to develop data-driven evaluation methods, damage tolerance design methods and special test techniques for aero-engine additive manufacturing structures.