スウィーピングのカーリング・ストーン運動に対する影響

―摩擦による温度上昇，摩耗による局所傾斜および氷微粒子生成―

抄録

Friction and abrasion are inevitable when the ice surface is swept with any smooth brush head. Heat produced by friction reduces the ice friction coefficient and makes the stone slide farther. Abrasion produces a local slope and fine ice particulates through mechanical deformation and destruction of pebbles. The gravity force due to the local slope formed in front of the stone must be taken into consideration in the stone motion. Our calculation showed that with powerful sweeping it is possible in principle to manipulate the trajectory of a stone, that is, to accelerate or change the direction and extent of curl. Sweeping using a brush head with hard rough surface is not discussed in the present paper, which may produce serious mechanical damage on ice surfaces, e.g., scratches and ditches, and may not be used in usual curling games.