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

Abstract:

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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