Mechanisms of ice softening under high pressure and shear

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Auteur	Rechercher : Jordaan, Ian; Rechercher : Li, Chuanke; Rechercher : Barrette, Paul Identifiant ORCID : https://orcid.org/0000-0002-0975-8884; Rechercher : Duval, Paul; Rechercher : Meyssonnier, Jacques
Format	Texte, Article
Conférence	18th International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 2005, June 26-30, 2005, Potsdam, NY; USA
Résumé	Under high hydrostatic pressure combined with shear, the structure of polycrystalline ice breaks down into fine-grained material by a process of recrystallization. Accompanying this process is a substantial softening of the material. Measurements of activation energy at low strains prior to the breakdown of structure, at temperatures of -10 °C, show an increase of activation energy from about 80 kJ mol-1 to about 120 kJ mol -1 as the pressure increases, with values at about 70 MPa similar to those found by other researchers for temperatures between -10 and 0 °C. These results suggest that grain boundary effects might result in the increased strain rates. The various energies that might drive the subsequent recrystallization process have been investigated. The results suggest strongly that elastic strain energy is the driving force in the process.
Date de publication	2005
Maison d’édition	Lulea University of Technology
Dans	Proceedings of the International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 2005 1 (2005) : 249–259.
Langue	anglais
Publications évaluées par des pairs	Oui
Publication du CNRC	Cette publication n’est pas du CNRC Ce sont des publications qui ont été rédigées par un auteur du CNRC, mais avant que celui-ci soit employé du CNRC.
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Identificateur de l’enregistrement	e5531835-24b5-4198-ae45-b7cf69d76019
Enregistrement créé	2019-05-10
Enregistrement modifié	2021-03-26

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Date de modification :: 2026-07-10