Mechanical properties of PVA brushes and its relation with hysteresis friction

In this study, we measured share forces generated during brush sliding with different sliding speed and brush rotation. We also observed the brush deformation during brush sliding with a high-speed video camera. The share forces were increased with the increase of brush sliding speed and decreased with the increase of brush rotation. Large deformation of brush was observed without brush rotation. However, the brush deformation was suppressed by the brush rotation. From these results, we conclude that part of the shear forces was generated by brushes deformation, not the contact condition.