Analysis and Verification on Buckling Mechanism of Spatial Tow Steering in Automated Fiber Placement  

作　　者：Minghui Yi Fei Liu Baoning Chang Yingdan Zhu Xilun Ding Wuxiang Zhang 

机构地区：[1]School of Mechanical Engineering and Automation,Beihang University,Beijing 100191,China [2]Advanced Manufacturing Center,Ningbo Institute of Technology,Beihang University,Ningbo 315100,China [3]Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China

出　　处：《Chinese Journal of Mechanical Engineering》2024年第5期424-438,共15页中国机械工程学报（英文版）

基　　金：Supported by National Natural Science Foundation of China(Grant Nos.52205003 and 51575018);Zhejiang Provincial Natural Science Foundation(Grant No.LD22E050011);Ningbo Municipal Key Projects of Science and Technology Innovation 2025 Plan(Grant No.2022Z070).

摘　　要：Automated fiber placement(AFP)enables the efficient and precise fabrication of complex-shaped aerospace composite structures with lightweight and high-performance properties.However,due to the excessive compression on the inner edge of the tow placed along the curved trajectory,the resulting defects represented by buckling and wrinkles in spatial tow steering can induce poor manufacturing accuracy and quality degradation of products.In this paper,a theoretical model of tow buckling based on the first-order shear deformation laminate theory,linear elastic adhesion interface and Hertz compaction contact theory is proposed to analyze the formation mechanism of the wrinkles and predict the formation of defects by solving the critical radius of the trajectory,and finite element analysis involving the cohesive zone modeling(CZM)is innovated to simulate the local buckling state of the steered tow in AFP.Additionally,numerical parametric studies and experimental results indicate that mechanical properties and geometric parameters of the prepreg,the curvature of the placement trajectory and critical process parameters have a significant impact on buckling formation,and optimization of process parameters can achieve effective suppression of placement defects.This research proposes a theoretical modeling method for tow buckling,and conducts in-depth research on defect formation and suppression methods based on finite element simulation and placement experiments.

关 键 词：Automated fiber placement Spatial tow steering Buckling mechanism Process optimization 

分 类 号：TB33[一般工业技术—材料科学与工程]