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Simulating of a pressing process of a viscoelastic polymer melt
Author(s) -
AlBaldawi Ammar,
Wünsch Olaf
Publication year - 2012
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201210224
Subject(s) - viscoelasticity , pressing , viscosity , newtonian fluid , materials science , rheology , generalization , anisotropy , polymer , deformation (meteorology) , tensor (intrinsic definition) , flow (mathematics) , work (physics) , process (computing) , mechanics , composite material , thermodynamics , computer science , mathematics , mathematical analysis , physics , geometry , optics , operating system
A well known and often used method to obtain anisotropic polymer films is the so‐called pressing process. Here, films are squeezed under high temperatures, pressure and deformation rates. To simulate such a process, the polymeric matrix is treated as a non‐Newtonian, viscoelastic melt. The modeling of such melts is done with the anisotropic molecule movement tensor generalization of the Maxwell Model for high deformation rates. The viscoelastic flow simulations are done with DEVSS stabilization techniques and an ALE based dynamic mesh Method. In this work we present simulations in order to show the difference between classical approaches using a generalized Newtonian viscosity to model the melt and the used viscoelastic models. (© 2012 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)