Flooded cracks in first year sea ice refreeze rapidly, their physical and mechanical properties being governed by heat flow to the ice-air interface and laterally to the surrounding ice sheet. Here we investigate the crack strength by first finding the flexural strength of the pristine ice sheet usi...
| Main Authors: | , |
|---|---|
| Other Authors: | |
| Format: | Text |
| Language: | English |
| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.503.5718 http://www.physics.otago.ac.nz/research/ice/publications/Langhorne_ISOPE2004.pdf |
| Summary: | Flooded cracks in first year sea ice refreeze rapidly, their physical and mechanical properties being governed by heat flow to the ice-air interface and laterally to the surrounding ice sheet. Here we investigate the crack strength by first finding the flexural strength of the pristine ice sheet using an in situ cantilever beam test. An artificial crack was then formed at the hinge of the beam and allowed to refreeze. The flexural strength of the ice containing the partially refrozen crack was then tested, and examined as a function of refreezing time and of crack width. The results are interpreted in relation to the brine fraction within the partially refrozen crack. KEY WORDS: Refrozen cracks; land-fast; sea-ice; cantilever beam; flexural strength |
|---|