When an elastic body of revolution rolls tractively over another, the period from commencement of rolling until gross rolling\r\nensues is termed the prerolling regime. The resultant tractions in this regime are characterized by rate-independent hysteresis behavior\r\nwith nonlocal memory in function of the traversed displacement. This paper is dedicated to the theoretical characterization\r\nof traction during prerolling. Firstly, a theory is developed to calculate the traction field during prerolling in function of the instantaneous\r\nrolling displacement, the imposed longitudinal, lateral and spin creepages, and the elastic contact parameters. Secondly,\r\nthe theory is implemented in a numerical scheme to calculate the resulting traction forces and moments on the tractive rolling of a\r\nball. Thirdly, the basic hysteresis characteristics are systematically established by means of influence-parameters simulations using\r\ndimensionless forms of the problem parameters. The results obtained are consistent with the limiting cases available in literature\r\nand they confirm experimental prerolling hysteresis observations. Furthermore, in a second paper, this theory is validated experimentally\r\nfor the case of V-grooved track.
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