Abstract
CFRP pressure vessels are used as the hydrogen storage system of fuel cell vehicles (FCVs). FCVs are expected to increase a driving distance of at least 500 km as same as conventional gasoline-fueled vehicles. Therefore, the storage pressure of hydrogen must be raised from 35MPa to 70MPa. Isogrid structures have a higher specific strength and stiffness and they are composed of triangular grid stiffeners and face layer. We fabricated CFRP isogrid cylinder shells with a 3-axis filament winding machine. Their compression properties showed good performances. In this study, in order to increase burst pressure, pressure vessels reinforced with CFRP grids were considered. We executed those optimum designs by using methods of a finite element method and a response surface method under the condition of the constant weight.
