Friction Variability in Slip Rings: Geometry and Stiffness Effects

This study explores the frictional dynamics in wire-on-V-groove contacts, particularly in slip rings, by examining the effects of contact geometry and loading stiffness. Our experimental setup, using three different custom tribometers, allowed precise control and measurement of these variables. Results show a significant deviation of the friction coefficient from traditional Amonton–Coulomb predictions, highlighting an increased sensitivity to the aforementioned factors. These findings challenge the conventional understanding of tribology, emphasizing the need for a refined theoretical model that better accounts for the complexities in V-groove contacts. The study's implications are far-reaching, particularly in improving the design and reliability of slip rings in high-precision instruments and satellite technologies.