Sea Ice: Part II. Estimating the Full-Scale Tensile, Flexural, and Compressive Strength of First-Year Ice

• Main Author: Kovacs, Austin
• Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
• Format: Text
• Language: English
• Published: 1996
• Subjects: Snow; Ice and Permafrost; Physical and Dynamic Oceanography; *SALINITY; *SEA ICE; *BRINES; TEMPERATURE; TENSILE STRENGTH; CONDUCTIVITY; MODULUS OF ELASTICITY; ICE MECHANICS; ELECTRICAL CONDUCTIVITY; POROSITY; STRAIN RATE; FLEXURAL STRENGTH; FLOW CHARTING; COMPRESSIVE STRENGTH; BEAUFORT SEA; DENSIMETERS; PH METERS; SALINOMETERS; ICE FLOES; ICE STRUCTURE INTERACTIONS; Beaufort Sea; Ice; Ice Sheet; permafrost; Sea ice
• Online Access: http://www.dtic.mil/docs/citations/ADA317247; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA317247

Sea-ice salinity, density, and temperature data were used to develop new methods for determining the bulk brine volume and porosity of sea-ice floes. Methods for estimating full-thickness ice sheet strength, based on large-scale field tests, are presented. The relationships among bulk sea-ice properties, strain rate, and strength are illustrated. A new constitutive equation was developed for predicting the full-thickness horizontal compressive strength of first-year sea ice as a function of the applied strain rate and bulk porosity. An estimate of the horizontal force that may develop between first-year sea ice and a 90-m-wide structure is given. Estimating sea-ice strength based on remote ice conductivity measurements is also discussed conceptually.