A DEVELOPMENT OF MULTI PURPOSE TESTING MACHINE FOR FRICTION, WEAR AND ROLLING CONTACT FATIGUE

development and implementation of an optimized control strategy for induction machine in an electric vehicle

in the area of automotive engineering there is a tendency to more electrification of power train. in this work control of an induction machine for the application of electric vehicle is investigated. through the changing operating point of the machine, adapting the rotor magnetization current seems to be useful to increase the machines efficiency. in the literature there are many approaches wh...

Rolling Contact Fatigue in Ultra High Vacuum

Rolling contact fatigue of surface coatings—a review

The aim of this review is to survey the state of the art relating to the rolling contact fatigue (RCF) investigation of various overlay coatings and also, to ascertain the influence of design parameters such as the type of deposition process, coating material and thickness on the RCF performance. Rolling contact fatigue is a significant factor in the failure of components in rolling/sliding con...

Rolling friction and bistability of rolling motion

The rolling motion of a rigid cylinder on an inclined flat viscous surface is investigated and the nonlinear resistance force against rolling, FR(v), is derived. For small velocities FR(v) increases with velocity due to increasing deformation rate of the surface material. For larger velocity it decreases with velocity due to decreasing contact area between the rolling cylinder and the deformed ...

Friction and Wear Testing Can Steer the Development of Ceramic Tribo Materials

The development of materials for tribological applications requires test methods for the determination of friction and wear behaviour of these materials. One of many different test methods useful for this task is the "oscillating sliding test", working with a ball-on-disk configuration. This test is applicable on rather small specimens and can provide preliminary information on friction and wea...