Structural Analysis Of Filament-wound Composite Vessel With Inner Metal Lining

A high-pressure vessel, made of filament-wound composite, has been used in many demanding applications such as rocket generator cases, and oxygen and hydrogen tanks etc. in the aeronautic and astronautic industry, because of having many advantages. The high-pressure composite vessel usually consists of the inner metal lining and outer winding graphite fiber reinforced plastic with high strength. The aims of the paper are to establish a model and method for structural analysis of the fiber-wound vessel with metal inner lining and develop a corresponding engineering analysis code. The main contents of the paper are:(1) Review the state and art for fiber-wound vessel with metal inner lining;(2) Provide a method to present the technical features including wound process, equal stress dome and fiber gathering at the dome etc.(3) Establish a finite element analysis model considering nonlinear physical and geometrical effects and develop a equivalent constitutive relation for winding graphite fiber reinforced plastic layers;(4) Set up a failure criterion for the inner metal lining and winding graphite fiber reinforced plastic layers;(5) Develop a corresponding engineering analysis code based on the commercial software ANSYS;(6) Investigate the plastic deformation and residual stress in the inner lining due to winding tension and pre-tension, and stress distribution of the composite vessel under service loading case.The analysis model, method and conclusions would be useful for designers of engineering composite structures. The project is a sub-key project of National 863 program in China.