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

Strength and lifetime assessment and design for additive manufacturing structures in aero-engine:review and prospects

介绍了增材制造技术在航空发动机中的应用现状,重点论述航空发动机中增材制造结构强度、寿命评估与设计等关键技术的研究进展。分别从增材制造缺陷的无损检测方法与等效准则、考虑缺陷影响的关重件强度与寿命预测方法,以及创新结构一体化设计技术等方面探讨了现有研究进展、存在不足,以及发展趋势。结果表明:航空发动机中增材制造结构强度、寿命评估处于起步阶段,大多针对增材制造材料及简单结构的单一失效模式,仍需在复合疲劳失效、“结构特征-广布缺陷-表面形貌”多因素耦合失效等方面开展研究,从而发展适用于航空发动机增材制造结构的数据驱动评估方法、损伤容限设计方法以及专用试验技术。

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.