Creep constitutive equations for polycrystalline ice and effect of microcracking

Auteur	Rechercher : Duval, P.; Rechercher : Kalifa, P.; Rechercher : Meyssonnier, J.
Format	Texte, Article
Conférence	Ice-Structure Interaction, IUTAM-IAHR Symposium, 14-17 August 1989, St. John's, Newfoundland
Résumé	The deformation modes of polycrystalline ice are reviewed. Whereas single crystals of ice deform easily by shear on the basal plane, the minimum creep rate of polycrystalline ice is largely controlled by processes occurring on non-basal planes. Three main models describing the transient behaviour of polycrystalline ice are presented and discussed. Evidence that the occurrence of the first cracks, in the ductile-brittle transition, is related to a critical delayed elastic strain is presented. The mechanical behaviour of damaged ice is discussed. It is shown that damage enhances the creep rate notably.
Date de publication	1991
Langue	anglais
Identificateur	IR-1991-41
Numéro du CNRC	NRC-IOT-6139
Numéro NPARC	8895530
Exporter la notice	Exporter en format RIS
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Identificateur de l’enregistrement	b7489acb-72dc-4e48-a022-0844f49a79f8
Enregistrement créé	2009-04-22
Enregistrement modifié	2023-05-16