Abstract:

A simulation of forces acting in model-yarns transported through the drawing zone was carried out. The model is characterised by two random variables: the length of a yarn segment (link) and the yarn’s drawing rigidity. The drawing zone consists of two pairs of rolls working with different tangential velocities. Computer simulations carried out indicate the causes of the stochastic character of tensions, which is connected with the irregularity of the yarn’s mechanical properties. The simulations also determine the ranges of changes to the force dispersion in dependence on the length of the drawing zone, the coefficients of variation of the drawing rigidity, and the lengths of the component yarn segments which have various mechanical characteristics.