Flexural and compressive strength of the landfast sea ice in the Prydz Bay, East Antarctic
A total of 25 flexural and 55 uniaxial compressive strength tests were conducted in laboratory using landfast sea ice samples collected in the Prydz Bay. Three-point bending tests were performed at ice temperatures of −12 to −3 ∘C with force applied vertically to original ice surface, and compressiv...
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Copernicus Publications
2022
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00061097 2023-05-15T13:49:21+02:00 Flexural and compressive strength of the landfast sea ice in the Prydz Bay, East Antarctic Wang, Qingkai Li, Zhaoquan Lu, Peng Xu, Yigang Li, Zhijun 2022-05 electronic https://doi.org/10.5194/tc-16-1941-2022 https://noa.gwlb.de/receive/cop_mods_00061097 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00060604/tc-16-1941-2022.pdf https://tc.copernicus.org/articles/16/1941/2022/tc-16-1941-2022.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-16-1941-2022 https://noa.gwlb.de/receive/cop_mods_00061097 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00060604/tc-16-1941-2022.pdf https://tc.copernicus.org/articles/16/1941/2022/tc-16-1941-2022.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2022 ftnonlinearchiv https://doi.org/10.5194/tc-16-1941-2022 2022-05-22T23:11:02Z A total of 25 flexural and 55 uniaxial compressive strength tests were conducted in laboratory using landfast sea ice samples collected in the Prydz Bay. Three-point bending tests were performed at ice temperatures of −12 to −3 ∘C with force applied vertically to original ice surface, and compressive strength tests were performed at −3 ∘C with a strain-rate level of 10−6–10−2 s−1 in the directions vertical and horizontal to ice surface. Judging from crystal structure, the ice samples were divided into congelation ice, snow ice, and a mixture of the two. The results of congelation ice showed that the flexural strength had a decreasing trend depending on porosity rather than brine volume, based on which a mathematical equation was established to estimate flexural strength. Both flexural strength and effective modulus of elasticity increased with increasing platelet spacing. The uniaxial compressive strength increased and decreased with strain rate below and above the critical regime, respectively, which is 8.0 × 10−4–1.5 × 10−3 s−1 for vertically loaded samples and 2.0 × 10−3–3.0 × 10−3 s−1 for horizontally loaded samples. A drop-off in compressive strength was shown with increasing sea ice porosity. Consequently, a model was developed to depict the combined effects of porosity and strain rate on compressive strength in both ductile and brittle regimes. The mechanical strength of mixed ice was lower than congelation ice, and that of snow ice was much weaker. To provide a safe guide for the transportation of goods on landfast sea ice in the Prydz Bay, the bearing capacity of the ice cover is estimated with the lower and upper envelopes of flexural strength and effective elastic modulus, respectively, which turned out to be a function of sea ice porosity. Article in Journal/Newspaper Antarc* Antarctic Prydz Bay Sea ice The Cryosphere Niedersächsisches Online-Archiv NOA Antarctic Prydz Bay The Cryosphere 16 5 1941 1961 |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Wang, Qingkai Li, Zhaoquan Lu, Peng Xu, Yigang Li, Zhijun Flexural and compressive strength of the landfast sea ice in the Prydz Bay, East Antarctic |
topic_facet |
article Verlagsveröffentlichung |
description |
A total of 25 flexural and 55 uniaxial compressive strength tests were conducted in laboratory using landfast sea ice samples collected in the Prydz Bay. Three-point bending tests were performed at ice temperatures of −12 to −3 ∘C with force applied vertically to original ice surface, and compressive strength tests were performed at −3 ∘C with a strain-rate level of 10−6–10−2 s−1 in the directions vertical and horizontal to ice surface. Judging from crystal structure, the ice samples were divided into congelation ice, snow ice, and a mixture of the two. The results of congelation ice showed that the flexural strength had a decreasing trend depending on porosity rather than brine volume, based on which a mathematical equation was established to estimate flexural strength. Both flexural strength and effective modulus of elasticity increased with increasing platelet spacing. The uniaxial compressive strength increased and decreased with strain rate below and above the critical regime, respectively, which is 8.0 × 10−4–1.5 × 10−3 s−1 for vertically loaded samples and 2.0 × 10−3–3.0 × 10−3 s−1 for horizontally loaded samples. A drop-off in compressive strength was shown with increasing sea ice porosity. Consequently, a model was developed to depict the combined effects of porosity and strain rate on compressive strength in both ductile and brittle regimes. The mechanical strength of mixed ice was lower than congelation ice, and that of snow ice was much weaker. To provide a safe guide for the transportation of goods on landfast sea ice in the Prydz Bay, the bearing capacity of the ice cover is estimated with the lower and upper envelopes of flexural strength and effective elastic modulus, respectively, which turned out to be a function of sea ice porosity. |
format |
Article in Journal/Newspaper |
author |
Wang, Qingkai Li, Zhaoquan Lu, Peng Xu, Yigang Li, Zhijun |
author_facet |
Wang, Qingkai Li, Zhaoquan Lu, Peng Xu, Yigang Li, Zhijun |
author_sort |
Wang, Qingkai |
title |
Flexural and compressive strength of the landfast sea ice in the Prydz Bay, East Antarctic |
title_short |
Flexural and compressive strength of the landfast sea ice in the Prydz Bay, East Antarctic |
title_full |
Flexural and compressive strength of the landfast sea ice in the Prydz Bay, East Antarctic |
title_fullStr |
Flexural and compressive strength of the landfast sea ice in the Prydz Bay, East Antarctic |
title_full_unstemmed |
Flexural and compressive strength of the landfast sea ice in the Prydz Bay, East Antarctic |
title_sort |
flexural and compressive strength of the landfast sea ice in the prydz bay, east antarctic |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/tc-16-1941-2022 https://noa.gwlb.de/receive/cop_mods_00061097 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00060604/tc-16-1941-2022.pdf https://tc.copernicus.org/articles/16/1941/2022/tc-16-1941-2022.pdf |
geographic |
Antarctic Prydz Bay |
geographic_facet |
Antarctic Prydz Bay |
genre |
Antarc* Antarctic Prydz Bay Sea ice The Cryosphere |
genre_facet |
Antarc* Antarctic Prydz Bay Sea ice The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-16-1941-2022 https://noa.gwlb.de/receive/cop_mods_00061097 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00060604/tc-16-1941-2022.pdf https://tc.copernicus.org/articles/16/1941/2022/tc-16-1941-2022.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tc-16-1941-2022 |
container_title |
The Cryosphere |
container_volume |
16 |
container_issue |
5 |
container_start_page |
1941 |
op_container_end_page |
1961 |
_version_ |
1766251225409388544 |