In order to determine whether a ship will experience flooding in case of collision and grounding, a method to predict the ductile fracture was proposed. Based on studies within the framework of continuum damage mechanics, a rupture index IR was introduced. The true stress-strain relationship as well as the stress triaxiality were taken into account. the critical failure load and the location of crack initiation were reliably predicted. Computations based on the nonlinear FEM program MARC showed good agreement between numerical results and experimental values. Compared to another criteria using damage parameters, it is simpler to use the rupture index because it did not require complicated measurement of damage, i.e. one conventional stress-strain diagram from tension test was sufficient.
On ductile rupture criteria for structural tear in the case of ship collision and grounding
Über Dehnungsbruchkriterien für Konstruktionseinrisse bei Schiffskollisionen und -aufgrundlaufen
1998
8 Seiten, 11 Bilder, 13 Quellen
Conference paper
English
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