抄録
Friction between finger skin and an object plays an important role in the picking-up motion. Some researchers have reported friction coefficient values exceeding 1.0 [-] for skin samples. This is a rare phenomenon not observed in friction between artificial materials. This frictional behavior appears to be affected by sweat on the finger surface and elastic deformation of the dactylogram. In this report, we describe the influences of normal load and loading duration on the frictional behavior between the skin and a glass. A sliding tester and optical microscope were utilized. Normal load was applied to the glass with a lever system. That could adjust contact pressure. At light normal load, increased loading duration produced a higher frictional force. However, at heavy normal load the loading time displayed no apparent effect on frictional force. Frictional coefficient was decreased by an increase in load, and the highest value, 14.0 [-], was recorded at the lowest load tested.
