A failure envelope for saline ice in the brittle regime

• Main Author: Derradji-Aouat, A.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: 2002
• Subjects: ice failure criterion; failure envelope; saline ice; sea ice; freshwater ice; iceberg ice; ice strength; multi-surface failure theory; Sea ice
• Online Access: https://nrc-publications.canada.ca/eng/view/object/?id=79f84587-6ae6-495f-82d2-cd1157918b0c; https://nrc-publications.canada.ca/fra/voir/objet/?id=79f84587-6ae6-495f-82d2-cd1157918b0c

Gratz and Schulson (1994) and Gratz (1996) published the results of a large set of true-triaxial (3-D) strength experiments using Laboratory Grown Saline Ice (LGSI). In this paper, their results were used to develop a 3-D failure criterion "failure envelope" for saline ice. The latter was formulated on the basis of the multi-surface failure theory using the same set of elliptical equations as those used for fresh water isotropic ice and iceberg ice (previously, developed by Derradji-Aouat, 2000). The comparisons between the predicted and measured strength values demonstrate that the multi-surface formulation is appropriate to model the 3-D failure of saline ice. A global analysis reveals that there may exist a unified failure criterion for all three types of ice (freshwater isotropic ice, iceberg ice, and saline ice). If the existence of such a general failure envelope is demonstrated, the present failure envelope becomes all inclusive failure formulation "a universal failure envelope for all types of ice". NRC publication: Yes