Abstract By means of ADINA extended by fracture mechanical options elastic-plastic calculations were carried out for an experimental burst vessel with a long axial outer notch. With a 2-d model initiation, stable growth and instability of the crack is investigated. At the burst pressure the crack becomes a slit. Then the vessel is loaded by time dependent internal pressure distributions which were evaluated with a fluid code. The dynamic, elastic-plastic behaviour is analyzed with a 3-d model. Concerning fluid-structure interaction, the influence of modifications in the pressure distributions is investigated. Instable crack growth and crack arrest are taken into account. Dynamic J-integral values and leak areas were calculated using additional routines implemented in the ADINA program. Analytical and experimental results are compared.