Abstract
Structural vibration caused by ice crushing is an
important phenomenon which has to be taken
account in the design of structures. The crushing failure
mode and rate can often be the cause
of the vibration. Beside the dynamic properties of
structure the velocity of ice is known to be
important variable in the process.
Simulation of crushing is a challenging task. During the
continuous crushing process initially
intact ice is broken into flakes and fragments of
different sizes. The interaction of fragments
with structure and intact ice must be considered in the
analysis as previous failures affect
subsequent failures. The cohesive surface methodology is
known to be suitable for the
numerical analysis of fragmentation.
The cohesive surface methodology is applied in this
paper. The methodology is based on
inserting possible fracture planes between all elements
of the simulation model. This limits
the cracking to element boundaries but allows
fragmentation and subsequent interaction of
fragments. A new rate dependent stress-separation law has
been proposed and implemented
into the explicit solver of Abaqus software. The applied
method has been verified by
simulating structure-ice interaction with varying ice
velocity. The simulations in this paper
focus on determining velocity effects of ice crushing.
The simulated results have been compared with the
existing laboratory experiments. The
failure modes obtained in the simulation were similar to
the modes obtained in the
experimental tests. In the simulation the contact
pressure was found to be not evenly
distributed but concentrated into spots. The location of
the hot spot was varying during the
simulations as it is in the experiments. The highest load
was obtained at the beginning of the
simulation, similar as in the experiments. After initial
failure the results show fluctuations in
the contact force. The simulation results are promising.
Original language | English |
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Title of host publication | Proceedings of the 22nd International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 2013 |
Publisher | Aalto University |
Number of pages | 15 |
ISBN (Print) | 978-1-63266-549-2 |
Publication status | Published - 2013 |
MoE publication type | A4 Article in a conference publication |
Event | 22nd International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 2013 - Espoo, Finland Duration: 9 Jun 2013 → 13 Jun 2013 Conference number: 22 |
Conference
Conference | 22nd International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 2013 |
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Abbreviated title | POAC 2013 |
Country/Territory | Finland |
City | Espoo |
Period | 9/06/13 → 13/06/13 |