Plastic Faulting in Saltwater Ice

Compression experiments on laboratory-grown columnar S2 saltwater ice loaded triaxially through proportional loading at T = –20°C at applied strain rates of ε = 10–5–10–1 s–1 demonstrate that plastic (P) faulting is a mode of failure in saltwater ice when rapidly loaded under a high degree of confin...

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Bibliographic Details
Published in:Journal of Glaciology
Main Authors: Golding, Narayana, Snyder, Scott A, Schulson, Erland M, Renshaw, Carl E
Format: Text
Language:unknown
Published: Dartmouth Digital Commons 2014
Subjects:
ice dynamics
ice physics
ice rheology
sea ice
sea-ice dynamics
Earth Sciences
Glaciology
Physical Sciences and Mathematics
Sea ice
Online Access:https://digitalcommons.dartmouth.edu/facoa/1755
https://doi.org/10.3189/2014JoG13J178
https://digitalcommons.dartmouth.edu/context/facoa/article/2758/viewcontent/j13J178.pdf
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Summary:Compression experiments on laboratory-grown columnar S2 saltwater ice loaded triaxially through proportional loading at T = –20°C at applied strain rates of ε = 10–5–10–1 s–1 demonstrate that plastic (P) faulting is a mode of failure in saltwater ice when rapidly loaded under a high degree of confinement. In terms of microstructure, mechanical behavior and strength, saltwater ice that fails via P-faulting is almost indistinguishable from columnar S2 freshwater ice that fails via P-faulting loaded under the same conditions. The results also demonstrate that saltwater ice loaded rapidly may exhibit yet another mode of failure, in addition to P-faulting, through what appears to be a mechanism of pore collapse.

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