Simulation of dynamic ice indentation failure

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

1 Citation (Scopus)

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 languageEnglish
Title of host publicationProceedings of the 22nd International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 2013
PublisherAalto University
Number of pages15
ISBN (Print)978-1-63266-549-2
Publication statusPublished - 2013
MoE publication typeA4 Article in a conference publication
Event22nd International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 2013 - Espoo, Finland
Duration: 9 Jun 201313 Jun 2013
Conference number: 22

Conference

Conference22nd International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 2013
Abbreviated titlePOAC 2013
CountryFinland
CityEspoo
Period9/06/1313/06/13

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Indentation
Ice
Crushing
Failure modes
Experiments
Numerical analysis

Cite this

Kuutti, J., & Kolari, K. (2013). Simulation of dynamic ice indentation failure. In Proceedings of the 22nd International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 2013 Aalto University.
Kuutti, Juha ; Kolari, Kari. / Simulation of dynamic ice indentation failure. Proceedings of the 22nd International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 2013. Aalto University, 2013.
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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.",
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Kuutti, J & Kolari, K 2013, Simulation of dynamic ice indentation failure. in Proceedings of the 22nd International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 2013. Aalto University, 22nd International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 2013, Espoo, Finland, 9/06/13.

Simulation of dynamic ice indentation failure. / Kuutti, Juha; Kolari, Kari.

Proceedings of the 22nd International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 2013. Aalto University, 2013.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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AB - 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.

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Kuutti J, Kolari K. Simulation of dynamic ice indentation failure. In Proceedings of the 22nd International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 2013. Aalto University. 2013