High speed video observations of fracture from beam bending experiments on sea ice
A series of beam bending experiments were conducted on sea ice using a high speed video camera (6000 frames/s) to capture the propagation of the fractures. Crack propagation was found to be intermittent and average velocities were lower than that reported for crack propagation in freshwater ice. Pea...
| Main Authors: | , , |
|---|---|
| Format: | Article in Journal/Newspaper |
| Language: | unknown |
| Published: |
1999
|
| Subjects: | |
| Online Access: | https://nrc-publications.canada.ca/eng/view/object/?id=2793bf74-8796-4037-8842-51e75b8e53fe https://nrc-publications.canada.ca/fra/voir/objet/?id=2793bf74-8796-4037-8842-51e75b8e53fe |
| Summary: | A series of beam bending experiments were conducted on sea ice using a high speed video camera (6000 frames/s) to capture the propagation of the fractures. Crack propagation was found to be intermittent and average velocities were lower than that reported for crack propagation in freshwater ice. Peak crack velocities ranged from 30 to 62 ms and average velocities for propagation through the entire beam ranged from 3.6 to 20.5 m/s. Fracture toughness and average crack velocity correlated positively. Analysis of thin sections from tested beams suggested that crustal grain structure inflienced the direction of crack propagation and may have contributed to the intermittent propagation behaviour. Peer reviewed: Yes NRC publication: Yes |
|---|