Activities

  • The collected data from the field expeditions will be analyzed in cold climate laboratories.
  • Compression and tensile strength properties are important input data for constitutive modeling, of ice. Strength properties of ridged ice are not yet sufficiently investigated.
  • Analysis of ice samples, anisotropic behavior, strain rate dependency and strain softening at strain rates between 10-3 to 10-1 s-1.
  • The aim is to investigate structure and strength of pressure ridges. Core samples from different ridges and the surrounding level ice will be taken during field expeditions and transported to the laboratory. Studies on thin sections of the ice samples under cross-polarized light delivered information about internal structure of the ice. Uniaxial compressive and tensile strength tests will be performed with horizontal and vertical loading directions. The experimental procedure is Salinity and porosity may be measured for each sample. The mechanical properties obtained from the testing will be documented by consideration of crystal type, ice depth and total porosity.
  • Compressive strength of sea ice at higher strain rates (i.e. higher than 10-1 s-1) is not well studied and is of great interest for calibrating constitutive models for sea ice at high strain rates and brittle behavior of ice during ice-structure interactions.
  • Detailed planning of the required analysis.