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Calculated trajectories of curling stones sliding under asymmetrical friction
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences. (Tribomaterialgruppen, Tribomaterials group)
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences. (Tribomaterialgruppen, Tribomaterials group)
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences. (Tribomaterialgruppen, Tribomaterials group)
2012 (English)In: Nordtrib 2012, 15th Nordic Symposium on Tribology, 2012Conference paper, Oral presentation with published abstract (Refereed)
##### Abstract [en]

In the sport of curling, stones are slid across an ice sheet, aimed towards a target area. A sliding stone does not move in a straight line, but follows a curled trajectory, deviating in a direction determined by its rotation. As of yet, no satisfactory explanation for this motion has been presented, although many attempts have been made. In many of them, the curling motion has been attributed to an asymmetrical distribution of the friction force acting on the sliding stone, typically such that the friction on the rear of the stone (as seen in the direction of motion) is higher than that on the front. In this paper, the motion of a rotating curling stone sliding over ice is calculated, for different assumed distributions of the coefficient of friction in the contact between stone and ice, using a numerical method. It is shown that no redistribution of the friction, no matter how extreme, can explain the observed motion of a real curling stone.

2012.
##### Keywords [en]
Curling, ice friction, asymmetrical friction
##### National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
##### Research subject
Engineering Science with specialization in Tribo Materials; Engineering Science with specialization in Materials Science
##### Identifiers
OAI: oai:DiVA.org:uu-181816DiVA, id: diva2:559586
##### Conference
Nordtrib 2012, 15th Nordic Symposium on Tribology, 12-15 June 2012, Trondheim, Norway
Available from: 2012-10-09 Created: 2012-10-01 Last updated: 2018-01-12

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#### Authority records BETA

Nyberg, HaraldHogmark, StureJacobson, Staffan

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##### By author/editor
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Applied Materials Sciences
##### On the subject
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)

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Cite
Citation style
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