Mid-winter mechanical properties of ice in the Southern Beaufort Sea

Ice property measurements were carried out during ice breaking trials of the "CANMAR KIGORIAK" during the winter of 1979-80, primarily in landfast ice in the Southern Beaufort Sea in the vicinity of McKinley Bay. They included crystallographic analysis to establish ice type and structure, temperature and salinity profiles, and uniaxial compression and "Brazil" strength tests. The work was performed on board ship at the time of the trials. The ice under study included samples of first-year ice covers and multi-year pressure ridges. Sampling and measurement techniques are described. The strength results are discussed in terms of salinity, loading rate, grain structure, sample orientation and position in the ice cover. Strength results were found to agree generally with values in the literature.Pendant les essais du brise-glace "CANMAR KIGORIAK" durant l'hiver 1979-1980, on a mesur\ue9 les propri\ue9t\ue9s de la glace de la banquise c\uf4ti\ue8re pr\ue8s de McKinley Bay dans le Sud de la mer de Beaufort. On a effectu\ue9 des analyses cristallographiques pour d\ue9terminer le type de glace et sa structure, \ue9tablir des profils de temp\ue9rature et de salinit\ue9 et r\ue9aliser des essais de r\ue9sistance \ue0 la compression axiale et l'essai br\ue9silien. Le travail a \ue9t\ue9 effectu\ue9 \ue0 bord du brise-glace pendant les essais. Parmi les \ue9chantillons test\ue9 s, il y avait des glaces de premi\ue8re ann\ue9e et de glaces comprim\ue9es depuis de nombreuses ann\ue9es. On trouvera dans cette \ue9tude les descriptions des techniques de mesure et d'\ue9chantillonage. Les valeurs de r\ue9sistance obtenues sont compar\ue9es selon les conditions d'essais (salinit\ue9, charge, structure des cristaux, orientation de l'\ue9chantillon, et position de l'\ue9chantillon dans la couche de glace). Les r\ue9sultats sont en g\ue9n\ue9ral voisins de ceux de la litt\ue9rature traitant du sujet.Peer reviewed: YesNRC publication: Ye