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Tribological conditions of curling - the ultimate friction sport?
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences. (Tribomaterial, Tribomaterials)
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences. (Tribomaterial, Tribomaterials)
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences. (Tribomaterial, Tribomaterials)
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences. (Tribomaterial, Tribomaterials)
2011 (English)In: 18th International Conference on Wear of Materials, Philadelphia, USA, April 3-7, 2011, 2011Conference paper, Poster (with or without abstract) (Refereed)
Abstract [en]

Curling is an Olympic winter sport in which 8 players forming two teams slide stones across a sheet of ice towards a target area. The two teams have eight stones each and take turns to slide the stones over to the target area, some 28 m away from the release line. After being released, the stone is only affected by the sliding friction. However, this friction may be somewhat modified by sweeping the ice just in front of the sliding stone, using special curling brooms. Further, the trajectory of the stone becomes slightly curled. By slowly turning the stone clockwise when it is released, it will turn to the right, and vice versa. The best team in each round of 16 stones score one point for each stone resting closer to the target than the best stone from the opponent team.

The game makes up a very interesting tribological system, presenting a number of challenging problems. These problems include understanding exactly:

  • what determines the level of friction, and how it is affected by the sweeping,
  • how the roughness of the stone influences the friction, and how the sliding surface should best be prepared to give a stable and repeatable friction,
  • how the intentionally bumpy "pebbled" ice structure influences the friction,
  • the size and distribution of the contact spots between the rough stone and the pebbled ice,
  • the mechanism causing the curl of the stone - "Why does the stone curl?".

This poster is based on an experimental project, and presents this very intriguing tribological system. It offers some ready explanations and challenges the visiting tribologists to contribute their insights.

Place, publisher, year, edition, pages
2011.
National Category
Other Materials Engineering
Research subject
Engineering Science with specialization in Tribo Materials; Engineering Science with specialization in Materials Science
Identifiers
URN: urn:nbn:se:uu:diva-165141OAI: oai:DiVA.org:uu-165141DiVA: diva2:472007
Conference
Wear of Materials
Available from: 2012-01-03 Created: 2012-01-03 Last updated: 2016-04-19

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Nyberg, HaraldHogmark, StureJacobson, Staffan

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