| Abstract: | The axisymmetric two-dimensional flow of a polymer melt in the plane gap of a disk extruder produced by the normal stress effect is considered. The polymer is assumed to be a nonlinear viscoelastic medium, whose strain history is expressed by means of kinematic matrices. A rheological equation of state of the medium, in which all the invariants of the kinematic matrices are function of strain rate intensity, is established. The laws of distribution of the radial and tangential velocity components over the gap are found from the solution of the equations of motion, and expressions are obtained for the radial pressure distribution and the integral thrust.Volgograd Polytechnic Institute. Translated from Mekhanika Polimerov, No. 3, pp. 515–521, May–June, 1971. |
