Rheological parameters identification using in-situ experimental data of a flat die extrusion

Abstract : Viscosity is an important characteristic of flow property and process ability for polymeric materials. A flat die was developed and brought into service at Maillfer[8], to make rheological characterizations. Measurements were made with two different slit heights, at different extrusion speeds, for one type of material (LDPE). In this paper, the optimization by response surface method, with the moving least squares approximate (MLS) [5-6], is used to identify the rheological parameters of thermoplastic melt. The objective is to minimize the difference between the measurement pressure obtained in flat die and the numerical pressure calculated by one dimensional finite difference programme by sections [1]. Global relative error between these both pressure is the objective function. This objective function is minimised by varying the rheological parameters. For this minimization two methods are used i.e. local response surface and global response surface. The rheological parameters obtained by these methods allow calculating the viscosity, validated by comparing an experimental viscosity measured on a capillary rheometer.
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Communication dans un congrès
AMPT'2005 -8th International Conference on Advances in Materials and Processing Technologies, May 2005, Gliwice-WIsla, Poland. THE INSTITUTE OF ENGINEERING MATERIALS AND BIOMATERIALS OF THE SILESIAN UNIVERSITY OF TECHNOLOGY IN GLIWICE, POLAND, Extrait de : COMMENT'2005 Congress proceedings -Short papers / sous la dir. de L.A. DOBRZANSKI. - ISBN 83-89728-13-3, 4 p., 2005
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https://hal.archives-ouvertes.fr/hal-01788421
Contributeur : Imt Mines Albi Ecole Nationale Supérieure Des Mines d'Albi-Carmaux <>
Soumis le : mardi 5 mars 2019 - 17:23:51
Dernière modification le : mercredi 13 mars 2019 - 09:49:01

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  • HAL Id : hal-01788421, version 1

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Nadhir Lebaal, Stéphan Puissant, Fabrice Schmidt. Rheological parameters identification using in-situ experimental data of a flat die extrusion. AMPT'2005 -8th International Conference on Advances in Materials and Processing Technologies, May 2005, Gliwice-WIsla, Poland. THE INSTITUTE OF ENGINEERING MATERIALS AND BIOMATERIALS OF THE SILESIAN UNIVERSITY OF TECHNOLOGY IN GLIWICE, POLAND, Extrait de : COMMENT'2005 Congress proceedings -Short papers / sous la dir. de L.A. DOBRZANSKI. - ISBN 83-89728-13-3, 4 p., 2005. 〈hal-01788421〉

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