1. Simulation-based High-Speed Elongational Rheometer for Carreau-type Materials
- Author
-
Kannengiesser, Lukas, Arne, Walter, Bier, Alexander, Marheineke, Nicole, Schubert, Dirk W., and Wegener, Raimund
- Subjects
Mathematics - Numerical Analysis ,76-XX, 34B08, 34H05, 65-XX - Abstract
For the simulation-based design of fiber melt spinning processes, the accurate modeling of the processed polymer with regard to its material behavior is crucial. In this work, we develop a high-speed elongational rheometer for Carreau-type materials, making use of process simulations and fiber diameter measurements. The procedure is based on a unified formulation of the fiber spinning model for all material types (Newtonian and non-Newtonian), whose material laws are strictly monotone in the strain rate. The parametrically described material law for the elongational viscosity implies a nonlinear optimization problem for the parameter identification, for which we propose an efficient, robust gradient-based method. The work can be understood as a proof of concept, a generalization to other, more complex materials is possible.
- Published
- 2024