Affiliations: Department of Mechanical Engineering, Helsinki University of Technology, Helsinki, Finland | Schelde Naval Shipbuilding, Vlissingen, The Netherlands | Department of Marine Technology, The Norwegian University of Science and Technology, Trondheim, Norway | Technical University of Hamburg, Institute for Ship Structural Design and Analysis, Hamburg, Germany
Note: [] Corresponding author: S. Ehlers, Department of Mechanical Engineering, Ship Laboratory, Helsinki University of Technology, Tietotie 1C, 02015 TKK, Helsinki, Finland. Tel.: +358 9 451 3497; Fax: +358 9 451 4173; E-mail: soeren.ehlers@tkk.fi.
Abstract: Simulations of the collision response of three different ship side structures are performed using the finite element method. The aim is to obtain a force–penetration curve based on the inner mechanics without considering outer dynamics. Respective structures were previously tested in large scale under the right angle ship–ship collision with a bulbous bow and these experiments were used to validate the simulations. The analysis focus is to determine the influence on the collision results from different failure criteria including the mesh size sensitivity. This paper applies the Germanischer Lloyd (GL) criterion based on thru thickness plastic strain, the criterion based on studies of Peschmann and the Rice–Tracey and Crockcroft–Latham (RTCL) criterion. The comparison of results attained here with the experimental results brings an insight into the sensitivity of the failure criteria. The final conclusion of this work is the performance of the studied failure criteria and further guidelines for collision or grounding simulations.
Keywords: FEM, non-linear, LS-DYNA, failure criteria, large scale experiments
