The borehole jack: is it a useful arctic tool?
As the working temperatures in ice are very close to its melting point, it behaves visco-elastically and experiences what is commonly known as high temperature embrittlement. Its mechanical properties are rate and temperature sensitive and analysis must include load and displacement history. Borehol...
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ftnrccanada:oai:cisti-icist.nrc-cnrc.ca:cistinparc:20338115 2023-05-15T14:21:23+02:00 The borehole jack: is it a useful arctic tool? Sinha, N. K. 1986 text https://nrc-publications.canada.ca/eng/view/ft/?id=fb694972-b256-45b3-b412-c7098d113afe https://nrc-publications.canada.ca/eng/view/object/?id=fb694972-b256-45b3-b412-c7098d113afe https://nrc-publications.canada.ca/fra/voir/objet/?id=fb694972-b256-45b3-b412-c7098d113afe eng eng Proceedings of the 5th International Offshore Mechanics and Arctic Engineering Symposium, 5th International Offshore Mechanics and Arctic Engineering Symposium, April 13, 1986, Tokyo, Japan, Volume: 4, Publication date: 1986, Pages: 328–335 report_number:IRC-P-1415 jacks vérin stresses contrainte ice glace ice - working temperatures viscoelasticity high temperature embrittlement mechanical properties of ice electrohydraulic pump pressure diametral displacement as a function of time borehole jack test procedures - modifications article 1986 ftnrccanada 2021-09-01T06:34:36Z As the working temperatures in ice are very close to its melting point, it behaves visco-elastically and experiences what is commonly known as high temperature embrittlement. Its mechanical properties are rate and temperature sensitive and analysis must include load and displacement history. Borehole jack tests can be improved by the use of an electrohydraulic pump in conjunction with simultaneous recording of pressure and diametral displacement as a function of time. These small but significant modifications in the test procedures permit analysis of the response of a borehole jack test system under operational winter conditions in the High Arctic in first-year and multi-year sea ice. Les températures de service de la glace étant très proches de son point de fonte, la glace se comporte de facon visco-élastique et présente ce qu'on appelle communément une fragilité aux températures élevées. Ses propriétés mécaniques sont sensibles à la vitesse et à la température, et l'analyse doit prendre en compte les données concernant les charges et les déplacements. On peut améliorer les essais au vérin de forage en utilisant une pompe électro-hydraulique tout en enregistrant simultanément la pression et le déplacement diamétral en fonction du temps. Ces légères mais importantes modifications du mode opératoire permettent d'analyser la réponse d'un système d'essais au vérin de forage sur les glaces de mer de l'année ou pluriannuelles dans des conditions hivernales opérationnelles, dans l'Extrême Arctique. Peer reviewed: Yes NRC publication: Yes Article in Journal/Newspaper Arctic Arctic Arctique* Sea ice National Research Council Canada: NRC Publications Archive Arctic |
institution |
Open Polar |
collection |
National Research Council Canada: NRC Publications Archive |
op_collection_id |
ftnrccanada |
language |
English |
topic |
jacks vérin stresses contrainte ice glace ice - working temperatures viscoelasticity high temperature embrittlement mechanical properties of ice electrohydraulic pump pressure diametral displacement as a function of time borehole jack test procedures - modifications |
spellingShingle |
jacks vérin stresses contrainte ice glace ice - working temperatures viscoelasticity high temperature embrittlement mechanical properties of ice electrohydraulic pump pressure diametral displacement as a function of time borehole jack test procedures - modifications Sinha, N. K. The borehole jack: is it a useful arctic tool? |
topic_facet |
jacks vérin stresses contrainte ice glace ice - working temperatures viscoelasticity high temperature embrittlement mechanical properties of ice electrohydraulic pump pressure diametral displacement as a function of time borehole jack test procedures - modifications |
description |
As the working temperatures in ice are very close to its melting point, it behaves visco-elastically and experiences what is commonly known as high temperature embrittlement. Its mechanical properties are rate and temperature sensitive and analysis must include load and displacement history. Borehole jack tests can be improved by the use of an electrohydraulic pump in conjunction with simultaneous recording of pressure and diametral displacement as a function of time. These small but significant modifications in the test procedures permit analysis of the response of a borehole jack test system under operational winter conditions in the High Arctic in first-year and multi-year sea ice. Les températures de service de la glace étant très proches de son point de fonte, la glace se comporte de facon visco-élastique et présente ce qu'on appelle communément une fragilité aux températures élevées. Ses propriétés mécaniques sont sensibles à la vitesse et à la température, et l'analyse doit prendre en compte les données concernant les charges et les déplacements. On peut améliorer les essais au vérin de forage en utilisant une pompe électro-hydraulique tout en enregistrant simultanément la pression et le déplacement diamétral en fonction du temps. Ces légères mais importantes modifications du mode opératoire permettent d'analyser la réponse d'un système d'essais au vérin de forage sur les glaces de mer de l'année ou pluriannuelles dans des conditions hivernales opérationnelles, dans l'Extrême Arctique. Peer reviewed: Yes NRC publication: Yes |
format |
Article in Journal/Newspaper |
author |
Sinha, N. K. |
author_facet |
Sinha, N. K. |
author_sort |
Sinha, N. K. |
title |
The borehole jack: is it a useful arctic tool? |
title_short |
The borehole jack: is it a useful arctic tool? |
title_full |
The borehole jack: is it a useful arctic tool? |
title_fullStr |
The borehole jack: is it a useful arctic tool? |
title_full_unstemmed |
The borehole jack: is it a useful arctic tool? |
title_sort |
borehole jack: is it a useful arctic tool? |
publishDate |
1986 |
url |
https://nrc-publications.canada.ca/eng/view/ft/?id=fb694972-b256-45b3-b412-c7098d113afe https://nrc-publications.canada.ca/eng/view/object/?id=fb694972-b256-45b3-b412-c7098d113afe https://nrc-publications.canada.ca/fra/voir/objet/?id=fb694972-b256-45b3-b412-c7098d113afe |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Arctique* Sea ice |
genre_facet |
Arctic Arctic Arctique* Sea ice |
op_relation |
Proceedings of the 5th International Offshore Mechanics and Arctic Engineering Symposium, 5th International Offshore Mechanics and Arctic Engineering Symposium, April 13, 1986, Tokyo, Japan, Volume: 4, Publication date: 1986, Pages: 328–335 report_number:IRC-P-1415 |
_version_ |
1766294052991401984 |