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Title: Internal friction of H2O, D2O and natural glacier ice
Authors: Kuroiwa, Daisuke.
Keywords: Ice
Internal friction
Ice mechanics
Ice crystals
Glacier ice
Publisher: Cold Regions Research and Engineering Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Research report (Cold Regions Research and Engineering Laboratory (U.S.)) ; 131.
Description: Research Report
Summary: The three parts of this report are entitled (1) internal friction of pure H20, D20 and doped ice crystals, (2) internal friction at crystal boundaries, and (3) the internal friction of natural glacier ice. Part 1 uses the flexural vibration method and expresses internal friction as a logarithmic decrement of free oscillation. Equations are given for the logarithmic decrement, internal friction, and the resonant frequency of a rectangular bar. In Part 2 the grain boundary internal friction of ice grown from a melt was measured by cutting blocks containing individual crystal boundaries from polycrystalline ice and in laying these in single crystal bars. This friction depends upon concentrated chemical impurities. In Part 3 the internal friction of glacier ice was measured in specimens from Antarctica, Greenland, and Le Conte Glacier, Canada. Distinctively different curves were obtained for the specimens. These differences can be attributed to (1) environmental conditions at the time of formation, and (2) the environmental conditions that acted on the sample from the time of formation until the time of sampling.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Research Report

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