Effect of deflection on winding quality of composite shells with large aspect ratio

doi:10.19936/j.cnki.2096-8000.20210928.008

Abstract

Abstract: A composite material with a large aspect ratio is wound around the molded shell, which causes deflection during the molding process. In this paper, the effects of deflection on the winding shape, winding tension and curing residual stress of the shell are studied. Through analytical calculation and numerical simulation, the geometric model and finite element model of the composite shell with large aspect ratio are established. The geodesic winding method was used to explore the effect of deflection on the fiber winding linear type; the positive axis and off-axis strain conversion method was used to explore the effect of deflection on the fiber winding tension; the CHILE constitutive model was used to investigate the effect of deflection on the fiber winding residual stress. Through the simulation analysis of the composite shell with large aspect ratio, it is found that the deflection has little effect on the fiber winding linearity, and the deflection has a certain effect on the fiber winding tension. The tension increases with the increase of the shell deflection displacement value. It has a certain effect on the residual stress of fiber winding and curing, and it is regularly distributed in the circumferential direction of the shell.

Key words: large aspect ratio composite shell, deflection, linear shape, tension, curing residual stress

CLC Number:

TB332

XI Wang, GE Qing, XIAO Kang, ZHANG Qian, ZU Lei. Effect of deflection on winding quality of composite shells with large aspect ratio[J]. COMPOSITES SCIENCE AND ENGINEERING, 2021, 0(9): 55-61.

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