Field measurements of the shear strength of columnar- grained sea ice
The asymmetric four-point loading method was used successfully to measure the shear strength of columnar- grained sea ice. The tests were performed during the icebreaking trials of the R.V. "Polarstern" off the Labrador coast in May 1984. Brine volume, air content, ice temperature, and gra...
| Main Authors: | , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
1986
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| Subjects: | |
| Online Access: | https://nrc-publications.canada.ca/eng/view/ft/?id=503c7f9b-49da-4f87-8530-55266d4108a8 https://nrc-publications.canada.ca/eng/view/object/?id=503c7f9b-49da-4f87-8530-55266d4108a8 https://nrc-publications.canada.ca/fra/voir/objet/?id=503c7f9b-49da-4f87-8530-55266d4108a8 |
| Summary: | The asymmetric four-point loading method was used successfully to measure the shear strength of columnar- grained sea ice. The tests were performed during the icebreaking trials of the R.V. "Polarstern" off the Labrador coast in May 1984. Brine volume, air content, ice temperature, and grain-structure effects on shear strength were investigated. Shear strength values were between 550 kPa and 900 kPa, depending on total porosity and grain orientation with respect to the loading direction. Les auteurs ont utilisé avec succès la méthode du chargement asymétrique en quatre points pour mesurer la résistance au cisaillement de la glace de mer à grains prismatiques. Les mesures ont été réalisées en mai 1984 lors des essais effectués par le navire de recherche brise-glace " Polarstern" au large de la côte du Labrador. A cette occasion, on a étudié les effets du volume de saumure, de la teneur en air, de la température de la glace ainsi que de la structure granulaire sur la résistancde au cissaillement. Les valeurs de résistance au cisaillement se situaient entre 550 et 900 kPa, selon la porosité totale et l'orientation des grains en fonction de la direction de chargement. Peer reviewed: Yes NRC publication: Yes |
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