Finite element method failure analysis of a pressurized FRP cylinder under transverse impact loading

Safety is vital in transport vehicles, especially in case of accidents. The fuel tank must particularly be free from failure. This study discusses impact analyses of pressurized fibre-reinforced plastic (FRP) cylinders by simulation, using the finite element method. The FRP material is defined as orthotropic, and different failure conditions are defined for every failure mode. After failure, the elastic moduli are reduced, based on the appropriate damage mechanics. To represent a fluid-filled vessel, inner pressure is added to the cylinder, and nodal forces are loaded on the inner surface and side section nodes. A bar impactor hits the centre of the cylinder, vertical to the axis. As a result, the relationship between burst mode and inner pressure can be clarified.