ISO 11439 standards considers 4 types of high-pressure cylinders to storing natural gas for vehicles applications. Among them the type 2, metal-lined hoop wrapped cylinder, is the aim of this work. It describes a numerical model built using ANSYS application to determine stress on the metal liner and on the composite material applied on the liner via filament winding process. Using design criterion for laminate composites, the total thickness of the composite layer has been evaluated to get an optimized value. Employing the element shell multilayer of ANSYS 8.1 and a model of the type 2 cylinder, the stress state in the metal liner and in each layer of the composite system of epoxy-glass fibre has been studied. The failure criterion of Hill-Tsai for composite laminates was used to analyse failure of each layer. The results are analysed considering the performance of the cylinder under test conditions of loading of 30 MPa.
Numerical modeling; finite elements method; composite; type 2 high-pressure cylinder
