Abstract
Several kinds of wound roll defects like telescoping, dishing, starring, and wrinkles often appear in many manufacturing lines of web handling companies. In order to investigate how the dishing or telescoping is developed, three web winding processes are simulated by using a three dimensional FEM model which is composed of an isotropic web and a rigid core. The results show that (1) the web is wound around the core executing a slow vibratory motion in the lateral direction when the core is inclined against the web or winding tensions of both sides of the web are different. (2) The telescoping suddenly occurs when a lateral distributed load acting on a normally wound roll increases gradually. The critical lateral load gets larger as a winding tension or friction coefficient increases.
