Confined compressive strength of sea ice

The confined compressive strength has been measured for both vertical (A-type) and lateral (B-type) confinement conditions for sea ice from the Beaufort Sea. The results show that the confined compressive strength is extremely sensitive to the structure of the ice. For granular ice, the confined com...

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Main Authors: Timco, G. W., Frederking, R. M. W.
Format: Article in Journal/Newspaper
Language:English
Published: 1983
Subjects:
ice
Online Access:https://nrc-publications.canada.ca/eng/view/ft/?id=d95e8b3b-5cf0-4a0b-86b7-24e92c0ac5da
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spelling ftnrccanada:oai:cisti-icist.nrc-cnrc.ca:cistinparc:20375311 2023-05-15T14:22:44+02:00 Confined compressive strength of sea ice Timco, G. W. Frederking, R. M. W. 1983 text https://nrc-publications.canada.ca/eng/view/ft/?id=d95e8b3b-5cf0-4a0b-86b7-24e92c0ac5da https://nrc-publications.canada.ca/eng/view/object/?id=d95e8b3b-5cf0-4a0b-86b7-24e92c0ac5da https://nrc-publications.canada.ca/fra/voir/objet/?id=d95e8b3b-5cf0-4a0b-86b7-24e92c0ac5da eng eng issn:0357-9387 issn:1455-0873 The Seventh International Conference on Port and Ocean Engineering under Arctic Conditions. POAC 83, The Seventh International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 83, April 5, 1983, Helsinki, Finland, ISBN: 951-38-1703-2, Volume: 1, Publication date: 1983, Pages: 243–253 report_number:DBR-P-1152 ice glace compressive strength résistance à la compression particle size distribution granularité Beaufort Sea vertical (a-type) and lateral (b-type) ice confinement conditions ice structure effects granular ice columnar ice basal- plane glide plasticity theory plane strain plane stress yield surface freshwater ice comparison article 1983 ftnrccanada 2021-09-01T06:33:58Z The confined compressive strength has been measured for both vertical (A-type) and lateral (B-type) confinement conditions for sea ice from the Beaufort Sea. The results show that the confined compressive strength is extremely sensitive to the structure of the ice. For granular ice, the confined compressive strength for both A and B type confinement is 19% higher than for unconfined compressive strength. For columnar ice, the compressive strength for A- type confinement can be four times as high as the strength of unconfined or B-type confined compressive strength. These results are explained in terms of basal-plane glide in the ice. The results of the tests are used to evaluate the coefficients of an n-type yield function from plasticity theory. The functional form of the yield surface for the cases of plane strain and plane stress in the plane of the ice cover are presented and compared to the corresponding functions for freshwater ice. On a mesuré la résistance à la compression de plusieurs échantillons de glace d'eau de la mer de Beaufort confinés par des plaques verticales (type A) et latérales (type B). Les résultats montrent que la résistance en compression dépend nettement de la structure de la glace. Pour la glace granulaire, la résistance en compression avec les plaques A et B est de 19% plus grande que celle sans les plaques. Pour la glace columnaire la résistance en compression avec les plaques A peut être jusqu'à quatre fois supérieure à celle sans les plaques ou avec seulement les plaques B. Les résultats des essais sont commentés en expliquant le rôle des plans de glissement principaux. Les résultats des essais permettent de déterminer les coefficients d'une fonction reliant les contraintes du type n à partir de la théorie de la plasticité. Les fonctions de la surface de rupture pour des contraintes et des déformations dans le plan de la couverture de glace sont comparées aux fonctions correspondantes pour la glace d'eau douce. Peer reviewed: Yes NRC publication: Yes Article in Journal/Newspaper Arctic Beaufort Sea Mer de Beaufort Sea ice National Research Council Canada: NRC Publications Archive Mer de Beaufort ENVELOPE(-138.005,-138.005,69.500,69.500)
institution Open Polar
collection National Research Council Canada: NRC Publications Archive
op_collection_id ftnrccanada
language English
topic ice
glace
compressive strength
résistance à la compression
particle size distribution
granularité
Beaufort Sea
vertical (a-type) and lateral (b-type) ice confinement conditions
ice structure effects
granular ice
columnar ice
basal- plane glide
plasticity theory
plane strain
plane stress
yield surface
freshwater ice comparison
spellingShingle ice
glace
compressive strength
résistance à la compression
particle size distribution
granularité
Beaufort Sea
vertical (a-type) and lateral (b-type) ice confinement conditions
ice structure effects
granular ice
columnar ice
basal- plane glide
plasticity theory
plane strain
plane stress
yield surface
freshwater ice comparison
Timco, G. W.
Frederking, R. M. W.
Confined compressive strength of sea ice
topic_facet ice
glace
compressive strength
résistance à la compression
particle size distribution
granularité
Beaufort Sea
vertical (a-type) and lateral (b-type) ice confinement conditions
ice structure effects
granular ice
columnar ice
basal- plane glide
plasticity theory
plane strain
plane stress
yield surface
freshwater ice comparison
description The confined compressive strength has been measured for both vertical (A-type) and lateral (B-type) confinement conditions for sea ice from the Beaufort Sea. The results show that the confined compressive strength is extremely sensitive to the structure of the ice. For granular ice, the confined compressive strength for both A and B type confinement is 19% higher than for unconfined compressive strength. For columnar ice, the compressive strength for A- type confinement can be four times as high as the strength of unconfined or B-type confined compressive strength. These results are explained in terms of basal-plane glide in the ice. The results of the tests are used to evaluate the coefficients of an n-type yield function from plasticity theory. The functional form of the yield surface for the cases of plane strain and plane stress in the plane of the ice cover are presented and compared to the corresponding functions for freshwater ice. On a mesuré la résistance à la compression de plusieurs échantillons de glace d'eau de la mer de Beaufort confinés par des plaques verticales (type A) et latérales (type B). Les résultats montrent que la résistance en compression dépend nettement de la structure de la glace. Pour la glace granulaire, la résistance en compression avec les plaques A et B est de 19% plus grande que celle sans les plaques. Pour la glace columnaire la résistance en compression avec les plaques A peut être jusqu'à quatre fois supérieure à celle sans les plaques ou avec seulement les plaques B. Les résultats des essais sont commentés en expliquant le rôle des plans de glissement principaux. Les résultats des essais permettent de déterminer les coefficients d'une fonction reliant les contraintes du type n à partir de la théorie de la plasticité. Les fonctions de la surface de rupture pour des contraintes et des déformations dans le plan de la couverture de glace sont comparées aux fonctions correspondantes pour la glace d'eau douce. Peer reviewed: Yes NRC publication: Yes
format Article in Journal/Newspaper
author Timco, G. W.
Frederking, R. M. W.
author_facet Timco, G. W.
Frederking, R. M. W.
author_sort Timco, G. W.
title Confined compressive strength of sea ice
title_short Confined compressive strength of sea ice
title_full Confined compressive strength of sea ice
title_fullStr Confined compressive strength of sea ice
title_full_unstemmed Confined compressive strength of sea ice
title_sort confined compressive strength of sea ice
publishDate 1983
url https://nrc-publications.canada.ca/eng/view/ft/?id=d95e8b3b-5cf0-4a0b-86b7-24e92c0ac5da
https://nrc-publications.canada.ca/eng/view/object/?id=d95e8b3b-5cf0-4a0b-86b7-24e92c0ac5da
https://nrc-publications.canada.ca/fra/voir/objet/?id=d95e8b3b-5cf0-4a0b-86b7-24e92c0ac5da
long_lat ENVELOPE(-138.005,-138.005,69.500,69.500)
geographic Mer de Beaufort
geographic_facet Mer de Beaufort
genre Arctic
Beaufort Sea
Mer de Beaufort
Sea ice
genre_facet Arctic
Beaufort Sea
Mer de Beaufort
Sea ice
op_relation issn:0357-9387
issn:1455-0873
The Seventh International Conference on Port and Ocean Engineering under Arctic Conditions. POAC 83, The Seventh International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 83, April 5, 1983, Helsinki, Finland, ISBN: 951-38-1703-2, Volume: 1, Publication date: 1983, Pages: 243–253
report_number:DBR-P-1152
_version_ 1766295256858361856