Author(s): B. L. Parsons
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Abstract: A series of tests have been performed with pairs of vertical flat plates at various separations edge loaded against floating columnar freshwater ice. The load on each indenter and the total load on the two plates was measured as a function of interaction speed (v=0,2-2000 mm/s), indenter width (D = 2.7 - 380 mm), indenter separation centre to center (S = 0 - 6D), strain rate (v/ (S+D) ) = (10-1 to 10-3), aspect ratio ( (D + S) /h = 0.1 - 30). All tests were done on ice thickness of 25 mm. A scale effect was observed; as indenter size increased, effective pressure decreased. Also the pressure was found to increase with increasing strain rate. Both these results differ from the results of previous workers. The dependence of pressure on separation and absolute size indicate that the damage zone size, and thus the micro mechanism of ice crushing, does not depend linearly on the area of indentation.
Year: 1990