Effects of Design Parameters on Mechanical Properties and Proposal of Design map for Type 4 Hydrogen Storage Vessel

Abstract

To contribute to shortening the design and development period of the Type 4 hydrogen pressure vessel, three-dimensional finite element analysis was performed to evaluate the effect on the mechanical properties based on the design parameters of the Type 4 (the length of the cylinder, the inner diameter of the cylinder, the hoop layer and helical layer thickness). Moreover, based on these FEA results and a modified Goodman diagram, a design map in which the design parameters of the hoop layer and the helical layer thickness considering to the weight and fatigue life as a designable area was proposed. As results, it was found that the helical layer and the hoop layer thickness affected the fiber direction stress, and that the stress concentration changed from the hoop layer to the helical layer in the dome part as the hoop layer thickness increases. In a design map, there was a gap in thickness between the theoretical layer and the optimal layer which was calculated from the design map, and it was revealed that importance of considering metal boss in determine the optimal ratio of hoop and helical layer thickness at the design process.