SciPost Phys. 8, 059 (2020) ·
published 16 April 2020
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The friction felt by a speed skater is calculated as function of the velocity
and tilt angle of the skate. This calculation is an extension of the more
common theory of friction of upright skates. Not only in rounding a curve the
skate has to be tilted, but also in straightforward skating small tilt angles
occur, which turn out to be of noticeable influence on the friction. As for the
upright skate the friction remains fairly insensitive of the velocities
occurring in speed skating.
SciPost Phys. 3, 042 (2017) ·
published 23 December 2017
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The friction of a stationary moving skate on smooth ice is investigated, in
particular in relation to the formation of a thin layer of water between skate
and ice. It is found that the combination of ploughing and sliding gives a
friction force that is rather insensitive for parameters such as velocity and
temperature. The weak dependence originates from the pressure adjustment inside
the water layer. For instance, high velocities, which would give rise to high
friction, also lead to large pressures, which, in turn, decrease the contact
zone and so lower the friction. The theory is a combination and completion of
two existing but conflicting theories on the formation of the water layer.
