Surface Roughness and Normal Force Effects on the Sliding and Rolling Behavior of POM-H Rolls
Sprache des Vortragstitels:
Englisch
Original Tagungtitel:
The 8th International Conference on Fracture Fatigue and Wear (FFW 2020)
Sprache des Tagungstitel:
Englisch
Original Kurzfassung:
Polymer bearings are increasingly used due to their simple mass production
and good tribological properties. The current contribution presents a macroscopic
study of the effects of surface roughness and normal force on the sliding and
rolling behavior of POM-H rolls. The counter-face roughness Ra was varied from
0.01 to 0.5 ?m and the normal force from 150 up to 350 N. A polynomial regression
model was used to analyze the effects of the two parameters and their interaction.
The experiments showed that the coefficient of sliding friction depends strongly on
the roughness with a distinct minimum at around 0.1 ?m and only slightly on the
normal force. In contrast, the coefficient of rolling resistance increases strongly with
higher normal forces. From 150 to 350 N the coefficient of rolling resistance doubles
in value. The roughness has a minor influence in rolling. The difference between
sliding and rolling expresses also in the opposite interaction effects of the roughness
and normal forces.
Forschungs-