Characterization and flexural strength of iceberg and glacier ice
Abstract Flexural strength of iceberg and glacier ice was determined from Four-point beam-bending experiments. A large quantity of glacial ice was collected from four icebergs and one glacier, and a detailed ice-characterization program was performed on samples from the five sources. Beam-bending ex...
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Language: | English |
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Cambridge University Press (CUP)
1995
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Online Access: | http://dx.doi.org/10.1017/s0022143000017809 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000017809 |
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crcambridgeupr:10.1017/s0022143000017809 2024-04-07T07:53:42+00:00 Characterization and flexural strength of iceberg and glacier ice Gagnon, R.E. Gammon, P.H. 1995 http://dx.doi.org/10.1017/s0022143000017809 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000017809 en eng Cambridge University Press (CUP) Journal of Glaciology volume 41, issue 137, page 103-111 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1995 crcambridgeupr https://doi.org/10.1017/s0022143000017809 2024-03-08T00:33:48Z Abstract Flexural strength of iceberg and glacier ice was determined from Four-point beam-bending experiments. A large quantity of glacial ice was collected from four icebergs and one glacier, and a detailed ice-characterization program was performed on samples from the five sources. Beam-bending experiments were conducted at four temperatures in the range −1 ° to-16 °C and at strain rates of 10 −3 and 10 −5 s −1 . The flexural strength was found to increase with increasing strain rate (based on extreme fibre strain and decreasing temperature. The data suggest than air-bubble inclusions play an important role in determining the flexural strength of glacial ice and this can explain the significant differences in mean strength of the ice from the five sources. At a strain rate of 10 −3 s −1 and temperature of —11 °C, the flexural strength was found to increase as the number of bubbles per unit volume increased. Reduction of crack-initiating stresses at grain boundaries by “softening” of grains due to intragranular air-bubble inclusions is thought to be the mechanism. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 41 137 103 111 |
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Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Gagnon, R.E. Gammon, P.H. Characterization and flexural strength of iceberg and glacier ice |
topic_facet |
Earth-Surface Processes |
description |
Abstract Flexural strength of iceberg and glacier ice was determined from Four-point beam-bending experiments. A large quantity of glacial ice was collected from four icebergs and one glacier, and a detailed ice-characterization program was performed on samples from the five sources. Beam-bending experiments were conducted at four temperatures in the range −1 ° to-16 °C and at strain rates of 10 −3 and 10 −5 s −1 . The flexural strength was found to increase with increasing strain rate (based on extreme fibre strain and decreasing temperature. The data suggest than air-bubble inclusions play an important role in determining the flexural strength of glacial ice and this can explain the significant differences in mean strength of the ice from the five sources. At a strain rate of 10 −3 s −1 and temperature of —11 °C, the flexural strength was found to increase as the number of bubbles per unit volume increased. Reduction of crack-initiating stresses at grain boundaries by “softening” of grains due to intragranular air-bubble inclusions is thought to be the mechanism. |
format |
Article in Journal/Newspaper |
author |
Gagnon, R.E. Gammon, P.H. |
author_facet |
Gagnon, R.E. Gammon, P.H. |
author_sort |
Gagnon, R.E. |
title |
Characterization and flexural strength of iceberg and glacier ice |
title_short |
Characterization and flexural strength of iceberg and glacier ice |
title_full |
Characterization and flexural strength of iceberg and glacier ice |
title_fullStr |
Characterization and flexural strength of iceberg and glacier ice |
title_full_unstemmed |
Characterization and flexural strength of iceberg and glacier ice |
title_sort |
characterization and flexural strength of iceberg and glacier ice |
publisher |
Cambridge University Press (CUP) |
publishDate |
1995 |
url |
http://dx.doi.org/10.1017/s0022143000017809 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000017809 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 41, issue 137, page 103-111 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000017809 |
container_title |
Journal of Glaciology |
container_volume |
41 |
container_issue |
137 |
container_start_page |
103 |
op_container_end_page |
111 |
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1795669783701618688 |