FE Simulation Of Fibre Winding Composite Cylinder With Aluminum Liner

Fully wrapped composite cylinder with inner metal liner has been widely employed in astronautics industry, aeronautics industry, construction and transportation because of its excellent performance, such as high pressure, high fatigue life, light weight, good corrosion resistance etc. The research about the mechanical properties and optimization design will be of great theoretical significance and value for engineering application.Computer simulation combined with theoretical analysis has been used to analyze the mechanical properties of the composite cylinder and the forming mechanism of spinning. Meanwhile, the parameters were optimized based on the FE simulation software MSC.Marc. A brief introduction of the project and its main results are as follows:Based on technological process, the variations of thickness and winding angle along the meridian in the domes section was considered during modeling. The element thickness and the principal direction of every unit of the domes were defined. Hexahedron element had been selected and mesh refinement had been used for structural change. Then, FEM models of composite cylinder are established corresponding to reality.The stress and strain distributions of aluminum liner under autofrettage, working and burst pressures have been obtained by FEM simulation of composite cylinder with 116L capacity. The computed values of bursting pressure basically tally with the theoretically analyses. The influence of defects at different locations with different size on the distribution of displacement, stress and strain as well as the burst pressure was studied. The results demonstrate that the stress concentration and maldistribution of displacement, stress and strain generated around the defects which affected the bursting pressure as well as the fatigue life of composite layers.The stress distribution and loading capacity of two kinds of overlay are analyzed. Design of layer two is better with its loading capacity bigger. Aspect ratio and thickness of the liner have been researched to optimize the design of the composite cylinder.The results may provide a theoretical guide for the determination and optimization of forming parameter.