虑及树脂分布非均匀性的一体化CFRP传动轴固化变形预测OA

Integrated carbon fiber reinforced polymer(CFRP)drive shafts featuring a flange-membrane disk-tube structure have emerged as a significant development direction for lightweight,high-performance transmission components,owing to their excellent specific strength/stiffness ratio and weight reduction potential.Addressing the unresolved challenge that existing models struggle to accurately characterize the influence of non-uniform resin distri-bution on cure-induced deformation and residual stresses within integrated CFRP drive shafts,this study proposes a novel cure deformation prediction method that incorporates resin distribution heterogeneity.Representative volume ele-ment(RVE)models with varying resin contents are established to predict the composite mechanical properties,ther-mal expansion,and chemical shrinkage characteristics.These predicted properties are then mapped onto a macroscop-ic finite element(FE)model of the drive shaft to simulate deformation behavior and stress distribution during the cu-ring process.The research results demonstrate that non-uniform resin distribution significantly impacts deformation and residual stresses in integrated CFRP drive shafts.Specifically,for every 1%increase in the difference in resin volume fraction between the upper and lower sides of the shaft,the maximum cure-induced deformation increases by 0.63 mm,and the maximum residual stress rises by 1.05 MPa.Notably,when the resin volume fraction difference between the upper and lower composite sections reaches 40%,the maximum bending deformation of the tube section can reach 23.67 mm(without membrane disks)and 22.45 mm(with membrane disks).Concurrently,residual stres-ses are concentrated predominantly in the fillet regions of the integrated flange and membrane disk,exhibiting a maxi-mum stress increase of 102.4%.Based on these findings,the paper further discusses deformation suppression strate-gies suitable for implementation in engineering.This work provides a crucial theoretical foundation and pathways for process optimization in the manufacturing of high-precision integrated CFRP drive shafts.