Effects of Specimen Size and Geometry Effects, Loading Rate and Microstructure on the Tensile Fracture of Saline Ice.

This report contains the details of the experimental program on large-scale in-situ arctic sea ice tests. A total of six field trips were completed. The experiments conducted included flexure tests, fracture tests as well as tests where the ice specimen was subjected to cyclic and creep-recovery typ...

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Bibliographic Details
Main Author: Dempsey, John P.
Other Authors: CLARKSON UNIV POTSDAM NY
Format: Text
Language:English
Published: 1995
Subjects:
Snow
Ice and Permafrost
*ICE MECHANICS
*SEA ICE
*PLANE GEOMETRY
TENSILE STRENGTH
MICROSTRUCTURE
LOADS(FORCES)
CRACKING(FRACTURING)
ICE FORMATION
FRACTURE(MECHANICS)
SEASONAL VARIATIONS
FLEXURAL STRENGTH
CYCLIC TESTS
CREEP TESTS
BEAUFORT SEA
ARCTIC OCEAN
CREEP STRENGTH
Arctic
Arctic Ocean
Griffith
Beaufort Sea
Ice
permafrost
Sea ice
Online Access:http://www.dtic.mil/docs/citations/ADA319202
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA319202
Description
Summary:This report contains the details of the experimental program on large-scale in-situ arctic sea ice tests. A total of six field trips were completed. The experiments conducted included flexure tests, fracture tests as well as tests where the ice specimen was subjected to cyclic and creep-recovery type loading. A maximum size range ratio of 1 to 160 was accomplished in fracture tests specifically to study the effect of variation in size. About six different geometries, (3 point bend, cantilever beam, griffith crack geometry, reverse taper geometry, square plate geometry, and rectangular plate geometry) were utilized to study the effect of geometry on tensile fracture. Since the field trips occurred in three seasons, seasonal variations in ice properties including sea ice thickness variation were studied. The ice types were S1 freshwater ice, S2 freshwater ice, S2 sea ice, thin lead ice and multiyear sea ice.

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