An experimental study, including three experimental devices, is presented in order to investigate dry friction phenomena in a wide range of sliding speeds for the steel on steel contact. A ballistic setup, with an air gun launch, allows to estimate the friction coefficient between 20?m/s and 80?m/s. Tests are completed by an adaptation of the sensor on a hydraulic tensile machine (0.01?m/s to 3?m/s) and a pin-on-disk tribometer mounted on a CNC lathe (1 to 30?m/s). The interactions at the asperity scale are characterized by a white light interferometer surface analysis.
Loading....