Modelling & Observation of Crack Nucleation in Ice Due to Elastic & Plastic Anisotropy.

• Main Author: Frost, Harold J.
• Other Authors: DARTMOUTH COLL HANOVER NH
• Format: Text
• Language: English
• Published: 1996
• Subjects: Snow; Ice and Permafrost; *ICE MECHANICS; *CRACK PROPAGATION; SINGLE CRYSTALS; TOUGHNESS; NUCLEATION; ICE FORMATION; FRACTURE(MECHANICS); FRESH WATER; BRITTLENESS; ANISOTROPY; CRYSTAL GROWTH; POLYCRYSTALLINE; STRESS CONCENTRATION; FRACTURE TOUGHNESS; Ice; permafrost
• Online Access: http://www.dtic.mil/docs/citations/ADA317344; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA317344

The primary result of this project are a clear understanding of the processes which initial cracks in columnar ice under typical conditions. The primary material of study was laboratory-grown freshwater ice, in which the crystals grew as long columns with diameters in the range of a few millimeters. For some fracture toughness measurements we used large single crystals of freshwater ice. Some related work has also been done on laboratory-grown columnar saline ice.