变角度自动铺丝制造缺陷特性及影响因素的研究进展

Research Progress on Defect Characteristics and Influencing Factors of Variable Angle Fiber Placement

自动铺丝作为一种先进的复合材料自动化成型技术被广泛应用于航空航天等领域,其中采用变角度自动铺丝能够提升航空航天结构件的设计空间,对于提高构件整体力学性能具有重要的意义。但目前该技术的加工工艺并不成熟且在成型过程中不可避免产生制造缺陷,对构件的力学性能带来不利的影响。针对变角度自动铺丝成型过程中的制造缺陷特性及其主要影响因素进行综述,介绍了自动铺丝的工作原理及变角度铺丝的优势,分析了褶皱、间隙和重叠缺陷的形成机制及其对变刚度层合板力学性能的影响,深入探讨了变角度铺丝制造缺陷的影响因素类型及作用机理,并论述了制造缺陷的抑制方法,最后总结了现阶段变角度自动铺丝技术存在的不足,并对该技术的未来研究趋势进行了展望。

Automated fiber placement as an advanced composite automated molding technique is widely used in aerospace and other fields, where the use of variable angle automated fiber placement can improve the design space of aerospace structures, which is of great significance to improve the overall mechanical properties of the components. However, the current processing technology of the variable angle automatic fiber placement technology is not mature, and manufacturing defects are inevitable in the forming process,which has adverse effects on the mechanical properties of the components. The characteristics of manufacturing defects and their main influencing factors in the process of variable angle automated fiber placement are summarized. The working principle of automated fiber placement and the advantages of variable angle placement are introduced. The formation mechanism and the effects of the gap, overlap, and wrinkle defects on the mechanical properties of variable stiffness laminates are analyzed. The types of factors influencing the manufacturing defects of variable angle placement and mechanism are discussed in depth. Furthermore, the suppression methods of manufacturing defects are discussed. Finally, the shortcomings of the variable angle automated fiber placement in current research are summarized and the future research trends of the technology have been prospected.