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Sammonds, P.
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article
Recrystallisation and damage of ice in winter sports
Abstract
Ice samples, after sliding against a steel runner, show evidence of recrystallization and microcracking under the runner, as well as macroscopic cracking throughout the ice. The experiments which produced these ice samples are designed to be analogous to sliding in the winter sport of skeleton. Changes in the ice fabric are shown using thick and thin sections under both diffuse and polarised light. Ice drag is estimated as 40-50% of total energy dissipation in a skeleton run. The experimental results are compared to visual inspections of skeleton tracks, and to similar behaviour in rocks during sliding on earthquake faults. The results presented may be useful to athletes and designers of winter sports equipment.