FRACTURE OF LAKE AND SEA ICE
The increased activity in cold regions has made a thorough understanding of fracture in lake and sea ice quite desirable. Inasmuch as this information has application to a number of problems of geophysical as well as engineering importance. This survey starts with a discussion of the structure of ice and the macro- and microstructure of sea and lake ice as well as their chemistry and phase relations. Recent work on the direct observation of dislocations as well as the formation of cracks in ice is summarized. Formal ice-brine-air models for analyzing variations in ice strength are also reviewed. The results of the different types of tests are discussed and compared (compressive, indentation, direct and ring-tension, small beam flexture and in situ cantilevers and simple beams, shear, and impact). Scale effects are considered as well as the rapid strength deterioration experienced by ice sheets in the spring. Finally, a number of recommendations are made concerning future research in this field. (Author)
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Supplemental Notes:
- Sponsored by Office of Naval Research, Washington, D.C.
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Corporate Authors:
U.S. Army Cold Regions Research and Engineering Laboratory
72 Lyme Road
Hanover, NH United States 03755-1290 -
Authors:
- Weeks, Wilford F
- Assur, A
- Publication Date: 1969-9
Media Info
- Pagination: 88 p.
Subject/Index Terms
- TRT Terms: Cracking; Ice; Icebreaking; Sea ice; Strength of materials
- Old TRIS Terms: Crack formation; Ice strength
- Subject Areas: Marine Transportation; Materials;
Filing Info
- Accession Number: 00015152
- Record Type: Publication
- Source Agency: Defense Documentation Center
- Report/Paper Numbers: CRREL-RR-269
- Files: TRIS
- Created Date: May 13 1972 12:00AM