Effective Pressures Measured During Indentation Tests in Freshwater Ice

by Devinder S. Sodhi, U.S. Army Cold Regions Research and, Engineering Lab, Hanover, United States,

Document Type: Proceeding Paper

Part of: Cold Regions Engineering


Indentation tests were conducted by pushing flat, vertical indentors of two different widths (50 and 100 mm) against the edges of floating, freshwater ice at different velocities (0.6-150 mm s-1). The stiffness of the indentor support system and the ice thickness were in the range of 0.8-3.5 MN m-1 and 18-57 mm, respectively. Three different modes of ice-structure interactions were observed: creep deformation at low velocities, intermittent crushing at intermediate velocities and continuous crushing at high velocities. The maximum effective pressures measured at different indentor velocities were found to differ by a factor of 3 to 5; high pressures (8-13 MPa) were measured at low indentor velocities (<20 mm s-1), and low pressures (1.2-4.3 MPa) at high indentor velocities (>100 mm s-1).

Subject Headings: Ice | Material properties | Pressure measurement | Material tests | Fresh water | Deformation (mechanics) | Offshore structures

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