Accession Number : ADA319202

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

Descriptive Note : Final rept. 1 Nov 92-31 May 95,

Corporate Author : CLARKSON UNIV POTSDAM NY

Personal Author(s) : Dempsey, John P.

PDF Url : ADA319202

Report Date : 31 MAY 1995

Pagination or Media Count : 19

Abstract : 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.

Descriptors :   *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.

Subject Categories : Snow, Ice and Permafrost

Distribution Statement : APPROVED FOR PUBLIC RELEASE