Effective Pressures Measured During Indentation Tests in Freshwater Iceby Devinder S. Sodhi, U.S. Army Cold Regions Research and, Engineering Lab, Hanover, United States,
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: Material properties | Ice | Pressure measurement | Fresh water | Material tests | Deformation (mechanics) | Creep | Stiffening | North America | Minnesota | United States
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