Development of an automated design system of a CNG composite vessel using a steel liner manufactured using the DDI process

Fibre reinforced composite material is widely used in multi-industrial fields where weight reduction of the infrastructure is required because of its high specific modulus and specific strength. Using this material has two main merits. One is to cut down energy use by reducing weight and the other is to prevent explosive damage preceding the sudden burst generated by the pressure leakage condition. Therefore, pressure vessels using this composite material in comparison with conventional metal vessels can be applied in fields such as the defence industry, aerospace industry and rocket motor casings where light weight but resistance to high pressure are demanded. In this paper, a standard interpretation model for nonlinear finite element analysis of E-glass/epoxy filament wound around composite pressure vessels receiving an internal pressure is developed by using AN-SYS, general commercial software that has been verified as accurate, and useful characteristics of the solution are based on Auto LISP and ANSYS APDL. Both the pre-processor for exclusive analyses of filament wound composite pressure vessels and the post-processor that simplifies the results of this analysis have been developed to help the design engineers.