The development of a new method to acquire friction creepage curve

Theoretical analysis on wear and adhesion at rolling-sliding contacts relies on the friction creepage curve. The measurement of the friction creepage curve, however, is quite difficult, such as the stability of longitudinal creepage adjustment and the measurement of vertical force and friction force, which affect the measurement of the friction creepage curve. To measure the friction creepage curve, a rolling contact twin wheelset test rig that can introduce longitudinal creepage is developed in this research. The longitudinal creepage between the upper and lower wheels can be adjusted by varying the radii of the wheels of the upper wheelset. The corresponding friction coefficients at various longitudinal creepage values can be acquired by the measurement of vertical force and torque proposed in this research. Furthermore, this measurement method can be applied to acquire the friction creepage curve, providing a reference for the investigation of friction characteristics.