气候变化领域集成服务门户(CCPortal): Strain response and energy dissipation of floating saline ice under cyclic compressive stress

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DOI	10.5194/tc-14-2849-2020
	Strain response and energy dissipation of floating saline ice under cyclic compressive stress
	Wei M.; Polojärvi A.; M. Cole D.; Prasanna M.
发表日期	2020
ISSN	19940416
起始页码	2849
结束页码	2867
卷号	14 期号:9
英文摘要	Understanding the mechanical behavior of sea ice is the basis of applications of ice mechanics. Laboratoryscale 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 sinusoidal 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 to 0.08 0.25MPa and cyclic loading frequencies of 0.001 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 floatingice specimens and demonstrate that the experimental method proposed in this study provides a convenient and practical approach to perform laboratory experiments on floating ice. © 2020 EDP Sciences. All rights reserved.
英文关键词	cyclic loading; energy dissipation; ice mechanics; sea ice; seawater; temperature gradient
语种	英语
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202242
作者单位	School of Engineering, Department of Mechanical Engineering, Aalto University, P.O. Box 14100, Aalto, 00076, Finland; ERDC-CRREL (Ret.), 72 Lyme Rd, Hanover, NH 03768, United States
推荐引用方式 GB/T 7714	Wei M.,Polojärvi A.,M. Cole D.,et al. Strain response and energy dissipation of floating saline ice under cyclic compressive stress[J],2020,14(9).
APA	Wei M.,Polojärvi A.,M. Cole D.,&Prasanna M..(2020).Strain response and energy dissipation of floating saline ice under cyclic compressive stress.Cryosphere,14(9).
MLA	Wei M.,et al."Strain response and energy dissipation of floating saline ice under cyclic compressive stress".Cryosphere 14.9(2020).