Study on static aeroelasticity performance of high aspect ratio hybrid composite swept wings

ZHANG Sheng; WANG Junli; LIU Jurong; ZHOU Yang; WANG Kangjie; WANG Jiahuan

doi:10.16579/j.issn.1001.9669.2026.04.006

Abstract：[Objective]To address the geometric nonlinearity of high aspect ratio swept wings under aerodynamic loads,this study investigates the effects of carbon/glass fiber hybrid ratios and layup angles on bend-twist coupling deformation and aerodynamic characteristics,aiming to provide references for structural design and tailoring of such wings.[Methods]Firstly,a static aeroelastic computational model for a high aspect ratio swept wing was established using a loosely coupled bidirectional computational fluid dynamics/computational structural dynamics(CFD/CSD)method,and its accuracy was validated against experimental data of the DLR-F6 wing-body configuration.Secondly,the differences between linear and nonlinear solutions were compared to clarify the influence of geometric nonlinearity.Then,the bending and torsional deformations of the wing were systematically analyzed under five hybrid ratios and five ply angle schemes.Finally,the impact of nonlinear elastic deformation on the aerodynamic characteristics of the wing with the optimal hybrid ratio was examined.[Results]The results indicate that the linear solution,which neglects spanwise deformation,leads to a tip displacement deviation of up to 0.77%at an 8° angle of attack.Compared with pure carbon fiber wings,the 3∶1 carbon/glass hybrid ratio increases the wingtip negative twist angle by only 2.1%while significantly reducing costs.The wing exhibits maximum torsional stiffness and minimum negative torsional deformation when the ply angle is±45°.The lift and drag coefficients of the 3∶1 hybrid wing are slightly lower than those of the pure carbon fiber wing,with a mere 3.7%reduction in longitudinal stability.Employing a 3∶1 carbon/glass hybrid ratio with±45° ply angles effectively balances mechanical performance,aerodynamic efficiency,and manufacturing cost,offering valuable insights for the engineering application of flexible wings.