ACTA AERONAUTICAET ASTRONAUTICA SINICA >
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)
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.
Chen LIU , Chen HE , Wenming GAO , Xianfeng WANG , Lin JIANG , Shuo CHENG , Yong LI , Jun XIAO . Dual scale ply design of composite aircraft auxiliary fuel tank[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2025 , 46(1) : 230541 -230541 . DOI: 10.7527/S1000-6893.2024.30541
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