ゴム摺動材の静止摩擦係数に及ぼす接線方向負荷履歴の影響

抄録

This study discussed the effects of tangential loading history on static friction coefficient of rubber slider with a split contact interface. First, numerical calculations with a simplified analytical model was performed to demonstrate the tangential loading history dependence of static friction coefficient. From the calculations, it was found that the stop-andrestart motion (SRM) works to increase the magnitude of static friction, while the stop-and-inversion motion (SIM) reduces static friction. Thus, the static friction is not a material (system) contestant; it strongly depends on operation conditions such as the loading sequence and the setting method of specimens. Additionally, this loading history dependence pointed out in this study was demonstrated by a model experiment, in which time change in friction force between a silicon rubber slider with a split contact interface and a rigid flat place was measured. In the experiment, as predicted in the calculation, it was observed that SRM increases static friction, while SIM decreases static friction force.