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| DOI | 10.5194/tc-15-2415-2021 |
| Behavior of saline ice under cyclic flexural loading | |
| Murdza A.; Schulson E.M.; Renshaw C.E. | |
| 发表日期 | 2021 |
| ISSN | 19940416 |
| 起始页码 | 2415 |
| 结束页码 | 2428 |
| 卷号 | 15期号:5 |
| 英文摘要 | New systematic experiments reveal that the flexural strength of saline S2 columnar-grained ice loaded normal to the columns can be increased upon cyclic loading by about a factor of 1.5. The experiments were conducted using reversed cyclic loading over ranges of frequencies from 0.1 to 0.6 Hz and at a temperature of-10 ĝ C on saline ice of two salinities: 3.0 ± 0.9 and 5.9 ± 0.6 ‰. Acoustic emission hit rate during cycling increases with an increase in stress amplitude of cycling. Flexural strength of saline ice of 3.0 ± 0.9 ‰ salinity appears to increase linearly with increasing stress amplitude, similar to the behavior of laboratory-grown freshwater ice (Murdza et al., 2020b) and to the behavior of lake ice (Murdza et al., 2021). The flexural strength of saline ice of 5.9 ± 0.6 ‰ depends on the vertical location of the sample within the thickness of an ice puck; i.e., the strength of the upper layers, which have a lower brine content, was found to be as high as 3 times that of lower layers. The fatigue life of saline ice is erratic. Cyclic strengthening is attributed to the development of an internal back stress that opposes the applied stress and possibly originates from dislocation pileups. © 2021 Andrii Murdza et al. |
| 英文关键词 | cryosphere; cyclic loading; experiment; laboratory method; saline lake |
| 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/202390 |
| 作者单位 | Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, United States; Department of Earth Sciences, Dartmouth College, Hanover, NH 03755, United States |
| 推荐引用方式 GB/T 7714 | Murdza A.,Schulson E.M.,Renshaw C.E.. Behavior of saline ice under cyclic flexural loading[J],2021,15(5). |
| APA | Murdza A.,Schulson E.M.,&Renshaw C.E..(2021).Behavior of saline ice under cyclic flexural loading.Cryosphere,15(5). |
| MLA | Murdza A.,et al."Behavior of saline ice under cyclic flexural loading".Cryosphere 15.5(2021). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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