Distribution Analysis of Local Ice Pressures in the Indentation Test at Various Velocities
When sea ice acts on vertical structures, there are much higher pressures in localized areas known as high-pressure zones (HPZs) than in other areas. The damage failure mode of sea ice varies with the sea ice velocity and affects the distribution of HPZs. In this study, an indentation test that driv...
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2022
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ftdoajarticles:oai:doaj.org/article:685c84a186c64fb1b30c2fc0ccf779b1 2023-05-15T16:41:34+02:00 Distribution Analysis of Local Ice Pressures in the Indentation Test at Various Velocities Guojun Wang Qianjin Yue Dayong Zhang Yanghua Fu Xin Peng Rui Dong 2022-03-01T00:00:00Z https://doi.org/10.3390/jmse10030433 https://doaj.org/article/685c84a186c64fb1b30c2fc0ccf779b1 EN eng MDPI AG https://www.mdpi.com/2077-1312/10/3/433 https://doaj.org/toc/2077-1312 doi:10.3390/jmse10030433 2077-1312 https://doaj.org/article/685c84a186c64fb1b30c2fc0ccf779b1 Journal of Marine Science and Engineering, Vol 10, Iss 433, p 433 (2022) local ice pressure sea ice failure mode distribution of local ice pressures probability distribution Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 article 2022 ftdoajarticles https://doi.org/10.3390/jmse10030433 2022-12-31T13:41:44Z When sea ice acts on vertical structures, there are much higher pressures in localized areas known as high-pressure zones (HPZs) than in other areas. The damage failure mode of sea ice varies with the sea ice velocity and affects the distribution of HPZs. In this study, an indentation test that drives ice sheet interaction with a vertical rigid plate (indentor) was designed, and a pressure sensor (consisting of 32 × 32 small pressure units of 100 mm 2 ) was installed on the indentor face to measure the local ice pressure (LIP) at various velocities. The distribution of the LIPs along the ice thickness, the probability distribution of the LIPs and the distribution relationship of the LIPS in space and time were obtained from the measurement. The results show that the LIPs were mainly distributed in the middle of the sea ice, which is consistent with full-scale observations and previous research. Ductile failure of the sea ice results in a larger LIP distribution area than brittle failure at the same threshold k t ( k t = σ L /σ cr ). The probability distribution of the LIPs decreases exponentially with increasing pressure and follows a lognormal distribution. The maximum LIP appears at the peak moment of the global force when the sea ice failure mode is mainly ductile failure. However, the maximum LIP may not occur at the peak moment when the sea ice failure is mainly brittle failure and, instead can appear at any moment in the global force time history curve. The HPZ (which is larger than 7/8 times the maximum LIP) area is less than 2% of the nominal contact area at various velocities. The influence of the sea ice velocity on the spatial and temporal distribution of LIP is analyzed, and the results provide a reference for designing structures with local strength in ice regions. Article in Journal/Newspaper Ice Sheet Sea ice Directory of Open Access Journals: DOAJ Articles Journal of Marine Science and Engineering 10 3 433 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
local ice pressure sea ice failure mode distribution of local ice pressures probability distribution Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 |
spellingShingle |
local ice pressure sea ice failure mode distribution of local ice pressures probability distribution Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 Guojun Wang Qianjin Yue Dayong Zhang Yanghua Fu Xin Peng Rui Dong Distribution Analysis of Local Ice Pressures in the Indentation Test at Various Velocities |
topic_facet |
local ice pressure sea ice failure mode distribution of local ice pressures probability distribution Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 |
description |
When sea ice acts on vertical structures, there are much higher pressures in localized areas known as high-pressure zones (HPZs) than in other areas. The damage failure mode of sea ice varies with the sea ice velocity and affects the distribution of HPZs. In this study, an indentation test that drives ice sheet interaction with a vertical rigid plate (indentor) was designed, and a pressure sensor (consisting of 32 × 32 small pressure units of 100 mm 2 ) was installed on the indentor face to measure the local ice pressure (LIP) at various velocities. The distribution of the LIPs along the ice thickness, the probability distribution of the LIPs and the distribution relationship of the LIPS in space and time were obtained from the measurement. The results show that the LIPs were mainly distributed in the middle of the sea ice, which is consistent with full-scale observations and previous research. Ductile failure of the sea ice results in a larger LIP distribution area than brittle failure at the same threshold k t ( k t = σ L /σ cr ). The probability distribution of the LIPs decreases exponentially with increasing pressure and follows a lognormal distribution. The maximum LIP appears at the peak moment of the global force when the sea ice failure mode is mainly ductile failure. However, the maximum LIP may not occur at the peak moment when the sea ice failure is mainly brittle failure and, instead can appear at any moment in the global force time history curve. The HPZ (which is larger than 7/8 times the maximum LIP) area is less than 2% of the nominal contact area at various velocities. The influence of the sea ice velocity on the spatial and temporal distribution of LIP is analyzed, and the results provide a reference for designing structures with local strength in ice regions. |
format |
Article in Journal/Newspaper |
author |
Guojun Wang Qianjin Yue Dayong Zhang Yanghua Fu Xin Peng Rui Dong |
author_facet |
Guojun Wang Qianjin Yue Dayong Zhang Yanghua Fu Xin Peng Rui Dong |
author_sort |
Guojun Wang |
title |
Distribution Analysis of Local Ice Pressures in the Indentation Test at Various Velocities |
title_short |
Distribution Analysis of Local Ice Pressures in the Indentation Test at Various Velocities |
title_full |
Distribution Analysis of Local Ice Pressures in the Indentation Test at Various Velocities |
title_fullStr |
Distribution Analysis of Local Ice Pressures in the Indentation Test at Various Velocities |
title_full_unstemmed |
Distribution Analysis of Local Ice Pressures in the Indentation Test at Various Velocities |
title_sort |
distribution analysis of local ice pressures in the indentation test at various velocities |
publisher |
MDPI AG |
publishDate |
2022 |
url |
https://doi.org/10.3390/jmse10030433 https://doaj.org/article/685c84a186c64fb1b30c2fc0ccf779b1 |
genre |
Ice Sheet Sea ice |
genre_facet |
Ice Sheet Sea ice |
op_source |
Journal of Marine Science and Engineering, Vol 10, Iss 433, p 433 (2022) |
op_relation |
https://www.mdpi.com/2077-1312/10/3/433 https://doaj.org/toc/2077-1312 doi:10.3390/jmse10030433 2077-1312 https://doaj.org/article/685c84a186c64fb1b30c2fc0ccf779b1 |
op_doi |
https://doi.org/10.3390/jmse10030433 |
container_title |
Journal of Marine Science and Engineering |
container_volume |
10 |
container_issue |
3 |
container_start_page |
433 |
_version_ |
1766032020687814656 |