关键词: 复合材料, 纤维缠绕, 压力容器, 非测地线, 爆破压强

Abstract: Carbon fiber winding spherical gas cylinders have been widely used in aerospace and civilian industry for its high specific strength and stiffness, and fatigue resistance. Based on the differential geometry, the trajectory equation of the doffing point satisfying the basic principle of spherical gas cylinder winding was derived. The fiber trajectories for non-geodesic over wound spherical gas cylinders and related stable winding condition were given. Then, the winding trajectories were simulated. Considering the variable curvature of spherical shells, the winding angle and thickness of winding layer were designed by Finite Element Analysis. By this method, the stress distribution of the aluminum liner and the winding layer were analyzed at the operating pressure. The bursting pressure of the spherical gas cylinders was also predicted. The results show that the optimal winding parameters simultaneously satisfy the basic requirements of the winding technology and improve the mechanical performance of the spherical gas cylinders effectively. The results of this paper are of important significance to design and manufacture the composite spherical pressure vessels.

Key words: composite materials, filament winding, pressure vessel, non-geodesic, bursting pressure