抄録
A series of basic researches was formerly made by the authors on static frictional phenomena. Recently, some experiments have been carried out with special reference to high-polymeric specimens in order to show the existence of minute deformation of the contact part before breaking in static frictional measurements.
Various micro-flow curves are observed, each one of which seems to correspond to the bulk properties of specimens used.
The method of applying external driving force is also studied in regard to its effect upon the value of maximum static frinctional force obtained thereby. As for the time rate of applying force, no remarkable differnce is found in the range between 0.5gr/sec. and 8, 000gr/sec. The negative dynamic load continuing for longer than 1/200 sec. is found to behave quite similarly as static load for the measurement of static friction.
