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MARSTRUCT benchmark study on nonlinear FE simulation of an experiment of an indenter impact with a ship side-shell structure

Lookup NU author(s): Professor Zhiqiang Hu

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).

Abstract

Explicit finite element (FE) analysis is an established method which is used to simulate ship collisions and analyse the crashworthiness of the structures involved. The recent advancement of computational capacity, resources and commercial FE software have reduced the computation time and made it easy for engineers and researchers to carry out crashworthiness studies of large-scale and complex marine structures. This paper presents a benchmark study on collision simulations and it was initiated by the MARSTRUCT Virtual Institute. The objective was to compare assumptions, models, modelling techniques and experiences between established researchers within the field. Fifteen research groups world-wide participated in the study. An experiment of an indenter that penetrates a ship-side structure was used as the case study. A description of how the experiment was performed, a geometry model of it, and material properties, were distributed to the participants prior to their simulations. The paper presents the results from the fifteen FE simulations and the experiment. It presents a comparison of among others the reaction force versus the indenter displacement, internal energy absorbed by the structure versus the indenter displacement, and analyses of the participants’ ability to predict failure modes and events that were observed in the experiment. The outcome of the study is a discussion and recommendations regarding mesh element size, failure criterion and damage models, interpretation of material data and how it is used in a constitutive material model, and finally, uncertainties in general.

Publication metadata

Author(s): Ringsberg J, Amdahl J, Chen B, Cho S, Ehlers S, Hu Z, Körgesaar M, Liu B, Niklas K, Parunov J, Samuelides M, Soares C, Tabri K, Quinton B, Yamada Y, Zhang S

Publication type: Article

Publication status: Published

Journal: Marine Structures

Year: 2018

Volume: 59

Pages: 142-157

Print publication date: 01/05/2018

Online publication date: 06/02/2018

Acceptance date: 22/01/2018

Date deposited: 25/01/2018

ISSN (print): 0951-8339

Publisher: Elsevier

URL: https://doi.org/10.1016/j.marstruc.2018.01.010

DOI: 10.1016/j.marstruc.2018.01.010

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