摘要
变角度纤维铺层能有效地增强结构刚度、减小应力集中,在很多领域得到广泛应用。本文对比了分区域设计直纤维铺层和变角度纤维铺层零件结构的优缺点,基于Patran的PCL语言开发出了纤维轨迹主应力法优化程序,以某飞机襟副翼复合材料层压板树脂传递模塑成形(RTM)支臂为例进行了纤维轨迹优化设计,分析了不同变角度纤维铺层数目和迭代次数对设计结果的影响,并和传统的分区域设计直纤维铺层模型进行了对比,得出了变角度纤维铺层能明显改善模型应变和位移的结论,且通过承载能力试验分析对比了分区域设计直纤维铺层和最外两层更换为变角度纤维铺层的RTM支臂的试验结果,得出了变角度纤维铺层能提高结构孔边强度和整体刚度的结论,验证了变角度纤维铺层的可行性及其优点。大开孔结构变角度纤维铺层优化设计对大开孔复合材料结构设计具有重要意义。
Variable angle fiber layers can effectively enhance structural stiffness and reduce stress concentration.Variable angle fiber layers are widely used in many fields.This paper compared the advantages and disadvantages of straight angle and variable angle fiber layer part,and based on Patran's PCL language,the optimization program of fiber trajectory principal stress method was developed.Taken the Resin Transfer Molding(RTM)support arm of aircraft flap aileron composite material laminate as an example,the fiber trajectory optimization design was carried out,the influence of different layers and iteration times on the design result was analyzed,and compared the straight angle was compared with variable angle fiber layer part.It was concluded that variable angle fiber layer significantly improved the strain and displacement of the model,and through the analysis of load-bearing capacity tests,the experimental results of RTM support arms designed in different regions with straight fiber layers and the outermost two layers replaced with variable angle fiber layers were compared.The conclusion was drawn that variable angle fiber layers can improve the strength and overall stiffness of structural holes,the feasibility and superiority of variable angle fiber layer were verified.The study on optimization design of large open structure variable angle fiber layering is of great significance to designing of large open composite material structure.
作者
王丽平
刘世丽
冯变变
Wang Liping;Liu Shili;Feng Bianbian(AVIC The First Aircraft Institute,Xi’an 710089,China)
出处
《航空科学技术》
2023年第8期37-43,共7页
Aeronautical Science & Technology
关键词
主应力法
复合材料
开孔结构
变角度纤维铺层
变角度纤维轨迹优化
principal stress method
composite
perforated structure
variable angle fiber layering
variable angle fiber trajectory optimization
