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Modeling wound rolls using explicit FE methods

Kandadai, B. K.
Good, J. K.
A new method of wound roll analysis using an explicit finite element formulation is presented in this paper. The stresses developed in center wound rolls with and without an undriven nip roller are discussed and compared with analyses found in literature. For center wound rolls with an undriven nip roller, the results show that the Nip-Induced-Tension (NIT) is proportional to the coefficient of friction between web layers and the nip load. The NIT is also found to be independent of the web tension. The conditions of slip that exist between the layers in the wound roll, the effect of start-up web to core discontinuities, advantages and limitations of this modeling technique have also been discussed.