Experimental and simulation analysis of different processes on curing deformation of stiffened composite panel

doi:10.19936/j.cnki.2096-8000.20220928.013

Abstract

Abstract: Experiments were performed in order to study the influence of different processes on curing deformation of T-shaped and U-shaped stiffened composite panels, and the deformation prediction was carried out by the finite element simulation. The comparison between experimental and simulation results verifies the accuracy of the analytical model. Furthermore, influences of both the bottom plate of T-shaped stiffener on deformation and the structure of the T-shaped and U-shaped, stiffener, were investigated by the analytical model. The results show that compared with the co-curing process, the dry stiffen wet skin process has a tendency to warp the structure longitudinally to the side of the skin while the wet stiffen dry skin process has the opposite effect. The transverse warping deformation and the torsional deformation are hardly influenced by the different processes. The incorporation of the bottom plate of T-shaped stiffener increases the longitudinal warping deformation and restrains the transverse warping deformation. At the same time, torsional deformation occurs due to the asymmetry caused by that plate. The design of the bottom plate is not conducive to the suppression of curing deformation. The U-shaped panel has an asymmetry structure and increased rigidity, which generates no torsional deformation and reduced longitudinal warping deformation. However, the effect of springback is increased, and the transverse warping deformation becomes larger.

Key words: composite material, stiffened composite panel, forming process, curing deformation, finite element analysis

CLC Number:

TB332

CHENG Wen-li, JIANG Ting, WAN Xi-wei, LIU Xiao-dong, YE Hong-jun, GUAN Zhi-dong. Experimental and simulation analysis of different processes on curing deformation of stiffened composite panel[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(9): 90-96.

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