复合材料飞机副油箱双尺度铺层设计
收稿日期: 2024-04-17
修回日期: 2024-05-23
录用日期: 2024-06-04
网络出版日期: 2024-06-11
基金资助
FCX-3 复材箱体设计和开发(YY05);北研中心民机预研专项:弹性剪裁蒙皮丝束牵引成型技术研究(COMAC-BYZX-2023-25);大涵道比航空发动机复材叶片短程自动铺放装备技术研发(BE2023014-4)
Dual scale ply design of composite aircraft auxiliary fuel tank
Received date: 2024-04-17
Revised date: 2024-05-23
Accepted date: 2024-06-04
Online published: 2024-06-11
Supported by
FCX-3 Composite Box Design and Development (YY05);Beijing Research Center Civil Aircraft Pre research Special Project: Research on Elastic Cutting Skin Wire Bundle Traction Forming Technology(COMAC-BYZX-2023-25);Research and Development of Short Range Automated Fiber Placement Equipment for Composite Blades of Aircraft Engines(BE2023014-4)
以飞机复材副油箱为研究对象,发展“整体-局部”双尺度铺层设计方法,对具有多尺度特征的封闭椭球体飞机副油箱整体与局部铺层进行了优化设计和分析。首先,基于副油箱特征结构,发展了副油箱结构力学分析方法,构建了具备防雷击功能的碳纳米管复合材料力学求解模型,综合分析蒙皮-筋条铺层结构在等效静强度和冲击工况下的载荷响应,并针对最佳铺层方案提出一种铺层顺序优化方法完成初步铺层优化;然后,考虑局部变厚度插层区的应力不均匀和层间/富树脂区损伤失效,采用内聚力单元和分层建模策略建立了变厚度试样细观力学模型,基于“子模型”和“壳-固”耦合技术,建立了副油箱局部变厚度结构求解模型,并提出了协同改善局部变厚度区受力的整体结构铺层设计方案;最终,根据整体-局部铺层优化后的设计方案,进行静力学、模态、冲击动力学分析,完成对副油箱整体结构的强度校核和验证。
刘琛 , 何晨 , 高文明 , 王显峰 , 江林 , 程硕 , 李勇 , 肖军 . 复合材料飞机副油箱双尺度铺层设计[J]. 航空学报, 2025 , 46(1) : 230541 -230541 . DOI: 10.7527/S1000-6893.2024.30541
Taking the aircraft composite auxiliary fuel tank as the research object, a “global-local” dual scale layup design method was developed to optimize and analyze the global and local layup of a closed ellipsoidal aircraft auxiliary fuel tank with multi-scale characteristics. Firstly, based on the characteristic structure of the fuel tank, a mechanical analysis method for the fuel tank structure was developed, and a mechanical model for carbon nanotube composite materials with lightning protection function was constructed. The load response of the skin rib layer structure under equivalent static strength and impact conditions was comprehensively analyzed, and a ply sequence optimization method was proposed for the optimal ply scheme to complete the preliminary ply optimization. Then, considering the uneven stress and interlayer/resin rich damage failure in the local variable thickness intercalation zone, a micro mechanical model of the variable thickness specimen was established using cohesive elements and delamination modeling strategy. Based on the “sub-modeling” and “shell-solid” coupling technology, a local variable thickness structural solution model for the auxiliary fuel tank was established, and a collaborative improvement of the overall structural layer design scheme for the stress in the local variable thickness zone was proposed. Finally, based on the global-local ply optimization design scheme, static, mode, and impact dynamic analyses were conducted to complete the strength validation of the global structure of the auxiliary fuel tank.
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