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Global Ice Fracture Experiments at Spitsbergen and Its Impact on Numerical Simulation of Ice Actions

Presented by: 
Sveinung Loset Norwegian University of Science and Technology, Norwegian University of Science and Technology, University Centre in Svalbard (UNIS)
Date: 
Thursday 7th December 2017 - 14:30 to 15:30
Venue: 
INI Seminar Room 1
Abstract: 
Co-author: Wenjun Lu (Norwegian University of Science and Technology)

The ice cover in the Arctic is both diminishing in areal extent and thinning. This leads to a situation where gravity waves are more prone to break up the ice cover into floe ice, and penetrate deeper into the ice fields in the Arctic. When this type of broken ice is interacting with offshore structures and ships, global fracturing of small or larger floes will be a major part of the interaction process and should be considered when either physically or numerically simulating the interaction process. An ice floe may fracture in different patterns. For example, it can be local bending failure or global splitting failure depending on the contact properties, geometry and confinement of the ice floe. Modelling these different fracture patterns as a natural outcome of numerical simulations is rather challenging. This is mainly because the effects of crack propagation, crack branching, multi fracturing modes and eventual fragmentation within a solid material are still questions to be answered by the on-going research in the Computational Mechanic community. In addition, the scale fracture properties of sea ice are still under discussions. To remedy some of these questions for ice we have conducted a number of physical fracture experiments at Spitsbergen during the winter of 2015-2017. The outcome of this research will be reported as well as the impact on numerical simulations of ice-structure interaction.
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    Clay Mathematics Institute London Mathematical Society NM Rothschild and Sons