Research On The Strength Of A Carbon Fibre Composite Material And Carbon Fibre Winding Cylinder With Aluminum Liner

As a new type of material, composite material has the advantages of high specific strength, well designability, comprehensive function and good economical efficiency. Its application has become more and more popular in industry, especially in the area of harsh conditions and high design requirements, such as aerospace, transportation, special pressure vessel and so on.Carbon fibre composite materials are used in many industries, but their properties are far from understanding. To save test cost, it is necessary to carry out theoretical simulation for the materials while performing experimental investigation. In this paper, ultimate strength of a carbon fibre composite material with a standard testing NOL-ring was calculated numerically using ANSYS software with two simulation methods, namely node coupling and contacting. And then do tensile experiment on NOL-ring. It indicates that finite element simulation is feasible and exact through comparing between simulation result and test result. In automotive and chemical industries, it usually requires high-performance cylinders to complete the media storage, transport and reaction, and composite cylinder is one of the options. In this paper, a carbon fibre winding cylinder with aluminum liner of 4.3L was made as the research investigation, and its mechanics performance was performed by ANSYS software. The effect was discussed on the performance with autofrettage technology. The optimal autofrettage pressure was got by optimization design with DOT CFFC criteria. The composite cylinder's mechanics performance was analyzed with autofrettage under zero pressure, working pressure, hydrostatic testing pressure and bursting pressure. Compare the different stress states of the cylinder with optimal autofrettage and not, it indicated that autofrettage technology can promote the performance of composite cylinder observably. The different performances were compared between composite cylinders and steel cylinders. It shows that composite cylinders have better mechanics performance and economical efficiency.