Variable stiffness design optimization of fiber-reinforced composite laminates with regular and irregular holes considering fiber continuity for additive manufacturing  

作　　者：Yi LIU Zunyi DUAN Chunping ZHOU Yuan SI Chenxi GUAN Yi XIONG Bin XU Jun YAN Jihong ZHU 

机构地区：[1]School of Mechanics,Civil Engineering&Architecture,Northwestern Polytechnical University,Xi’an 710072,China [2]Research&Development Institute of Northwestern Polytechnical University in Shenzhen,Shenzhen 518063,China [3]Key Lab for Airborne Hi-performance Electro-magnetic Window,RISAC,Jinan 130012,China [4]School of System Design and Intelligent Manufacturing,Southern University of Science and Technology,Shenzhen 518055,China [5]State Key Laboratory of Structural Analysis for Industrial Equipment,Department of Engineering Mechanics,International Research Center for Computational Mechanics,Dalian University of Technology,Dalian 116024,China [6]State IJR Center of Aerospace Design and Additive Manufacturing,MIIT Lab of Metal Additive Manufacturing and Innovative Design,Northwestern Polytechnical University,Xi’an 710072,China

出　　处：《Chinese Journal of Aeronautics》2025年第3期334-354,共21页中国航空学报(英文版)

基　　金：supports for this research were provided by the National Natural Science Foundation of China(No.12272301,12002278,U1906233);the Guangdong Basic and Applied Basic Research Foundation,China(Nos.2023A1515011970,2024A1515010256);the Dalian City Supports Innovation and Entrepreneurship Projects for High-Level Talents,China(2021RD16);the Key R&D Project of CSCEC,China(No.CSCEC-2020-Z-4).

摘　　要：Fiber-reinforced composites are an ideal material for the lightweight design of aerospace structures. Especially in recent years, with the rapid development of composite additive manufacturing technology, the design optimization of variable stiffness of fiber-reinforced composite laminates has attracted widespread attention from scholars and industry. In these aerospace composite structures, numerous cutout panels and shells serve as access points for maintaining electrical, fuel, and hydraulic systems. The traditional fiber-reinforced composite laminate subtractive drilling manufacturing inevitably faces the problems of interlayer delamination, fiber fracture, and burr of the laminate. Continuous fiber additive manufacturing technology offers the potential for integrated design optimization and manufacturing with high structural performance. Considering the integration of design and manufacturability in continuous fiber additive manufacturing, the paper proposes linear and nonlinear filtering strategies based on the Normal Distribution Fiber Optimization (NDFO) material interpolation scheme to overcome the challenge of discrete fiber optimization results, which are difficult to apply directly to continuous fiber additive manufacturing. With minimizing structural compliance as the objective function, the proposed approach provides a strategy to achieve continuity of discrete fiber paths in the variable stiffness design optimization of composite laminates with regular and irregular holes. In the variable stiffness design optimization model, the number of candidate fiber laying angles in the NDFO material interpolation scheme is considered as design variable. The sensitivity information of structural compliance with respect to the number of candidate fiber laying angles is obtained using the analytical sensitivity analysis method. Based on the proposed variable stiffness design optimization method for complex perforated composite laminates, the numerical examples consider the variable stiffness design optimization

关 键 词：Variable stiffness composite laminates Discrete material interpolation scheme Normal distribution fiber optimization Discrete fiber continuous filtering strategy Additive manufacturing of composite laminates 

分 类 号：TB332[一般工业技术—材料科学与工程]