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The Cryosphere An interactive open-access journal of the European Geosciences Union
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© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 07 Feb 2020

Submitted as: research article | 07 Feb 2020

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This preprint is currently under review for the journal TC.

Strain response and energy dissipation of floating saline ice under cyclic compressive stress

Mingdong Wei1, Arttu Polojärvi1, David M. Cole2, and Malith Prasanna1 Mingdong Wei et al.
  • 1Aalto University, School of Engineering, Department of Mechanical Engineering, P.O. Box 14100, 00076 Aalto, Finland
  • 2ERDC-CRREL (Ret.), 72 LymeRd., Hanover, NH 03768, USA

Abstract. Understanding the mechanical behavior of sea ice is the basis of ice mechanics applications. Laboratory-scale work on saline ice has often involved dry, isothermal ice specimens due to the relative ease of testing. This approach does not address the fact that the natural sea ice is practically always floating in seawater and typically has a significant temperature gradient. To address this important issue, we have developed equipment and methods for conducting compressive loading experiments on floating laboratory-prepared saline ice specimens. The present effort describes these developments and presents the results of stress-controlled cyclic compression experiments. We conducted the experiments on dry, isothermal (−10 °C) ice specimens and on floating ice specimens with a naturally occurring temperature gradient. The experiments involved ice salinities of 5 and 7 ppt, cyclic stress levels ranging from 0.04–0.12 MPa to 0.08–0.25 MPa and cyclic loading frequencies of 10−3 Hz to 1 Hz. The constitutive response and energy dissipation under cyclic loading were successfully analyzed using an existing physically based constitutive model for sea ice. The results highlight the importance of testing warm and floating ice specimens and demonstrate that the experimental method proposed in this study provides a convenient and practical approach to perform laboratory experiments on floating ice.

Mingdong Wei et al.

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Mingdong Wei et al.

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Latest update: 05 Apr 2020
Publications Copernicus
Short summary
Laboratory-scale work on saline ice is usually limited to the use of dry, isothermal specimens. We developed techniques for conducting indoor floating ice experiments. The mechanical behavior of floating ice specimens under cyclic compression was compared with that of dry specimens. Moreover, both of them were successfully analyzed using a theoretical model. Results demonstrate the importance of the work on warm and floating ice, increasingly existing in the polar regions due to climate change.
Laboratory-scale work on saline ice is usually limited to the use of dry, isothermal specimens....