变角度铺丝构件内嵌缺陷精确定位算法  

An Algorithm for Accurate Location of Embedded Defects in Variable Angle Fiber Placement Component

作　　者：钱金源 赵筱彤 王小平[1] 张乐恩 QIAN Jinyuan;ZHAO Xiaotong;WANG Xiaoping;ZHANG Leen(College of Mechanical and Electrical Engineering,NUAA,Nanjing 210016;College of Electronics and Information Engineering,NUAA,Nanjing 210016)

机构地区：[1]南京航空航天大学机电学院,南京210016 [2]南京航空航天大学电子信息工程学院,南京210016

出　　处：《宇航材料工艺》2021年第5期72-78,共7页Aerospace Materials & Technology

基　　金：国家自然科学基金资助项目(NO.51575266,NO.52075258)。

摘　　要：采用自动纤维铺放技术生产变角度铺丝构件时,在通过平移参考路径方法获得完整铺层过程中剪丝操作将导致构件中产生间隙、重叠形式的内嵌缺陷。将参考路径设计为更具通用性和设计自由度的B样条曲线。针对开边柱面铺丝构件,通过延长参考路径、丝束等距、丝带平移、丝束剪断、缺陷定位步骤,提出了不同剪断策略下的内嵌缺陷精确定位算法,该算法适用于任意覆盖参数。最后开发了相应Matlab程序验证算法的有效性,并可视化铺丝构件中内嵌缺陷的分布情况。结果表明算法可以精确确定不同覆盖参数下内嵌缺陷的位置,可为后续有限元精细模型建立提供理论依据。During the manufacture of variable angle component using automatic fiber placement technology,a complete ply can be obtained by shifting the reference course where cutting operation gives rise to embedded defects in the form of gap and/or overlap emerging in the component. The reference path is designed based on B-spline curve with more generality and design freedom. An algorithm for capturing the accurate location of embedded defects under different fiber-cutting tactics,including the steps of extending the reference path,tow offset,course shifting,tow drop and defect location,is put forward for the open-contoured cylinder component,which is applicable to any coverage parameters. Finally,a Matlab program is developed to verify the effectiveness of the algorithm and visualize the distribution of embedded defects in the component. The result shows that the algorithm can locate the embedded defects for different coverage parameters accurately and provide a theoretical basis for the subsequent fine finite element modeling.

关 键 词：自动纤维铺放 内嵌缺陷 间隙 重叠 丝束剪断 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]