DOI: 10.5194/tc-14-2849-2020
论文题名: Strain response and energy dissipation of floating saline ice under cyclic compressive stress
作者: Wei M. ; Polojärvi A. ; M. Cole D. ; Prasanna M.
刊名: Cryosphere
ISSN: 19940416
出版年: 2020
卷: 14, 期: 9 起始页码: 2849
结束页码: 2867
语种: 英语
英文关键词: cyclic loading
; energy dissipation
; ice mechanics
; sea ice
; seawater
; temperature gradient
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164620
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
Wei M.,Polojärvi A.,M. Cole D.,et al. Strain response and energy dissipation of floating saline ice under cyclic compressive stress[J]. Cryosphere,2020-01-01,14(9)