ICE FRICTION DURING SPEED SKATING

被引:81
作者
DEKONING, JJ
DEGROOT, G
SCHENAU, GJV
机构
[1] Faculty of Human Movement Sciences, Vrije Universiteit, 1081 BT Amsterdam
关键词
Ice--Friction;
D O I
10.1016/0021-9290(92)90099-M
中图分类号
Q6 [生物物理学];
学科分类号
071011 ;
摘要
During speed skating, the external power output delivered by the athlete is predominantly used to overcome the air and ice frictional forces. Special skates were developed and used to measure the ice frictional forces during actual speed skating. The mean coefficients of friction for the straights and curves were, respectively, 0.0046 and 0.0059. The minimum value of the coefficient of ice friction was measured at an ice surface temperature of about -7-degrees-C. It was found that the coefficient of friction increases with increasing speed, In the literature, it is suggested that the relatively low friction in skating results from a thin film of liquid water on the ice surface. Theories about the presence of water between the rubbing surfaces are focused on the formation of water by pressure-melting, melting due to frictional heating and on the 'liquid-like' properties of the ice surface. From our measurements and calculations, it is concluded that the liquid-like surface properties of ice seem to be a reasonable explanation for the low friction during speed skating.
引用
收藏
页码:565 / 571
页数:7
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