Numerical model for a failure process of an ice sheet
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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13
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Computers & Structures, Volume 269
Abstract
Model for describing a three-dimensional continuous failure process of an ice sheet is introduced. The presented model is based on the combined finite-discrete element method. The ice sheet consists of polyhedral rigid discrete elements joined by a lattice of Timoshenko beam elements, which go through cohesive softening upon sheet failure. The contact model accounts for inter-particle friction and local failure of ice in contacts. The model is carefully validated against a laboratory experiment, where an ice sheet is pushed against an inclined plane. Convincing agreement between the modelled and experimental failure process is found. The effect of ice sheet tessellation and element size is tested and found to be only moderate. The model compares favorably to earlier ones: The modelling and the experimental results agree, the domain sizes used can be large, and the modelled failure processes are long in duration. Requirements for numerical modelling of ice failure processes are discussed. (C) 2022 The Author(s). Published by Elsevier Ltd.Description
Funding Information: The author is grateful for the financial support from the Academy of Finland research project (309830) Ice Block Breakage: Experiments and Simulations (ICEBES). Dr. Janne Ranta and Dr. Devin O’Connor are thanked for the insightful discussions on the contact force model, its parameterization, and estimates on added mass. The research leading to this article was partly performed while visiting Thayer School of Engineering at Dartmouth College (Hanover, NH, USA) during spring 2020. Thanks are extended to Prof. Erland Schulson for hosting and the Finnish Maritime Foundation for partial funding of the visit. CSC–IT Center for Science (Finland) is acknowledged for computational resources under the project (2000971) Mechanics and Fracture of Ice. Author also wishes to thank the five anonymous reviewers whose comments helped to improve the manuscript. Funding Information: The author is grateful for the financial support from the Academy of Finland research project (309830) Ice Block Breakage: Experiments and Simulations (ICEBES). Dr. Janne Ranta and Dr. Devin O'Connor are thanked for the insightful discussions on the contact force model, its parameterization, and estimates on added mass. The research leading to this article was partly performed while visiting Thayer School of Engineering at Dartmouth College (Hanover, NH, USA) during spring 2020. Thanks are extended to Prof. Erland Schulson for hosting and the Finnish Maritime Foundation for partial funding of the visit. CSC–IT Center for Science (Finland) is acknowledged for computational resources under the project (2000971) Mechanics and Fracture of Ice. Author also wishes to thank the five anonymous reviewers whose comments helped to improve the manuscript. Publisher Copyright: © 2022 The Author(s)
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Polojärvi, A 2022, 'Numerical model for a failure process of an ice sheet', Computers & Structures, vol. 269, 106828. https://doi.org/10.1016/j.compstruc.2022.106828