Abstract
The effect on curing deformation and strength of 90° plies in stringers for composite T-shaped stiffened panel were presented by numerical analysis and experimental measurement. In this work, the finite element model (FEM) for curing deformation based on cure kinetics formulation was utilized. The model for buckling and failure based on Tsai-Wu failure criteria and incremental/ Newton -Raphson mixed iteration equation was established. The curing, buckling and post-buckling analysis were performed on composite T-shaped stiffened panels to obtain the deformation, the critical load and mode of failure, with different 90° plies-ratios in stringers. Furthermore, the experimental investigation has been carried out for specimens with different plies-ratios of 90° plies in stringers. The good agreement between the numerical results obtained by finite element method and the experimental ones demonstrated that this kind of numerical analysis could estimate appropriately the behavior of the structure. In addition, it was found that the 90° plies in stringers play an important role in reducing the curing deformation, but it has little effect on the axial compression loading capacity for composite T-shaped stiffened panel, which is useful for application in civil aviation aircraft.
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Acknowledgements
The work was supported by the National Natural Science Foundation of China (Grant Nos. 51575095, 51675089, and U1708254), and China Postdoctoral Science Foundation (2017 M610180). Thanks to AVIC SAC Commercial Aircraft Co. Ltd. for their supports in the manufacture of specimens and NDT inspection.
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Huang, W., Xie, L., Li, C. et al. Ananalytical and Experimental Study of T - Shaped Composite Stiffened Panels: Effect of 90° Plies in Stringers on Curing and Buckling Performance. Appl Compos Mater 27, 597–618 (2020). https://doi.org/10.1007/s10443-020-09816-4
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DOI: https://doi.org/10.1007/s10443-020-09816-4