In a rolling element system, the period of transition between motion commencement and the attainment of steady state, gross\r\nrolling, and termed prerolling is of common concern to many engineering applications. This region is marked by hysteresis friction\r\nbehavior, with a characteristic friction-displacement curve, which is in particular relevant to motion characterization and control\r\nissues. In a previous paper, the authors carried out a theoretical analysis of tractive prerolling, leading to a model for simulating this\r\nphenomenon. The present paper is dedicated to the experimental investigation of tractive prerolling friction behavior, including\r\nvalidation of the theoretical model. Firstly, a kinematic analysis of the rolling motion in V-grooved tracks is carried out. Secondly,\r\nthe influence of the normal load on the frictional behavior, in prerolling up to the attainment of gross rolling, is investigated on\r\na dedicated test setup. Finally, the newly developed theoretical model is validated by comparison with the experimental results.\r\nSatisfactory agreement is obtained between theory and experiment.
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