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Auteur M. R. Mackley |
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Ajouter le résultat dans votre panier Affiner la rechercheA personal perspective on the use of modelling simulation for polymer melt processing / Jean-François Agassant in INTERNATIONAL POLYMER PROCESSING, Vol. XXX, N° 1 (03/2015)
Titre : A personal perspective on the use of modelling simulation for polymer melt processing Type de document : texte imprimé Auteurs : Jean-François Agassant, Auteur ; M. R. Mackley, Auteur Année de publication : 2015 Article en page(s) : p. 121-140 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Etat fondu (matériaux)
Modélisation tridimensionnelle
Polymères
Rhéologie
Simulation par ordinateurIndex. décimale : 668.9 Polymères Résumé : This paper gives a personal view on the state of art in relation to the modelling of polymer melt processing. The paper briefly reviews both industrial, laboratory and modelling developments over the last forty years and highlights the key aspects now required for realistic modelling of polymer melt processing. The paper summarizes elements relating to the numerical simulation of specific and general polymer processes and also provides topical examples of the application of numerical modelling to certain commercial processes. The paper concludes with identifying areas of polymer processing that still remain a challenge in relation to accurate prediction. Note de contenu : - BACKGROUND TO POLYMER PROCESSING, RHEOLOGY AND MODELLING : The development of industrial processes - The development of new polymer materials - Modeling polymer processing
- FUNDAMENTALS RELEVANT TO POLYMER PROCESSING MODELLING : The high viscosity of polymer melts - The nonlinear behavior of molten polymers - Temperature effects - Base equations, boundary conditions and model simplification - Numerical schemes
- LABORATORY EXPERIMENTAL FLOW GEOMETRIES : Multipass rheometer - Smooth convergent flow
- SOME INDUSTRIAL FLOW GEOMETRIES : Fiber spinning - Optimization of a film-blowing die - Flat film "coat hanger" die processing - Extrusion profiles dies - Injection molding - Blow moldingDOI : 10.3139/217.3020 En ligne : https://drive.google.com/file/d/1TgwTQU4LTy1kHfCO4tCGZEJ3WrWMo5FM/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23433
in INTERNATIONAL POLYMER PROCESSING > Vol. XXX, N° 1 (03/2015) . - p. 121-140[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17016 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Polymer processing extrusion instabilities and methods for their elimination or minimisation Type de document : texte imprimé Auteurs : Jean-François Agassant, Auteur ; Bruno Vergnes, Auteur ; L. Robert, Auteur ; M. R. Mackley, Auteur ; H. Münstedt, Auteur ; A. Merten, Auteur ; C. Combeaud, Auteur ; D. R. Arda, Auteur Année de publication : 2006 Article en page(s) : p. 239-255 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : This paper presents and reviews findings in relation to three key areas where polymer processing instabilities occur. The paper also describes methods that can be utilised to reduce, or eliminate, the particular instability. Using previously published results in each of the three areas and work presented in the paper, physical insight into the three mechanisms is reviewed and compared. Extrusion instabilities develop with increasing extrusion rate and the onset of extrusion instability is often a key limitation to the maximum output of an extrusion line. The sharkskin instability is an exit effect instability that can be modified by changing exit geometries and eliminated using certain additives. The stick-spurt instability is intimately related to wall boundary conditions which can be influenced by certain wall and polymer formulations. Finally volume instabilities occur in the entry region of a die and result in a highly distorted product. The instabilities are related to viscoelastic effects within the die and can be minimised by appropriate die and polymer modification. The paper provides sufficient experimental background to identify the key physical aspects associated with each of the instabilities and this in turn provides insight into the different way each instability occurs and how they can be minimised. DOI : 10.3139/217.0084 En ligne : https://drive.google.com/file/d/10hHIv-ZkJl2JxKlmSkVKcF1XyjhKA-tT/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2838
in INTERNATIONAL POLYMER PROCESSING > Vol. XXI, N° 3 (07/2006) . - p. 239-255[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 005042 - Périodique Bibliothèque principale Documentaires Disponible
Titre : The matching of experimental polymer processing flows to viscoelastic vumerical simulation Type de document : texte imprimé Auteurs : Jean-François Agassant, Auteur ; F. Baaijens, Auteur ; A. Bernnat, Auteur ; A. C. B. Bogaerds, Auteur ; T. Coupez, Auteur ; B. Debbaut, Auteur ; A. L. Gavrus, Auteur ; A. Goublomme, Auteur ; M. van Gurp, Auteur ; R. J. Koopmans, Auteur ; H. M. Laun, Auteur ; K. Lee, Auteur ; O. H. Nouatin, Auteur ; M. R. Mackley, Auteur ; G. W. M. Peters, Auteur ; G. Rekers, Auteur ; W. M. H. Verbeeten, Auteur ; Bruno Vergnes, Auteur ; M. H. Wagner, Auteur ; E. Wassner, Auteur ; W. F. Zoetelief, Auteur ; H. Bastian, Auteur Année de publication : 2002 Article en page(s) : p. 3-10 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : This paper describes work carried out in order to match experimental processing flows to numerical simulations. The work has brought together a consortium that has developed reliable experimental methods by which processing flows can be achieved in the laboratory and then ranked against numerical simulation.
A full rheological characterisation of a selected range of polymers was made and the results compared from different laboratories. The data was fitted to a number of rheological models. Multi-mode parameter fitting was universal for the linear viscoelastic response. Particular attention was paid to the non linear response of the material. Prototype industrial flow experiments were carried out for a number of geometries in different laboratories and the flow birefringence technique was used to map out the experimentally observed stress fields for different polymers in a range of complex flows that contained both extensional and shear flow components. Numerical simulation was carried out using a number of algorithms and a range of constitutive equations.
In order to make a quantitative comparison between experiment and simulation, an Advanced Rheological Tool (ART) module was developed that was able in some cases to quantify the level of fit between the numerically predicted and the experimentally observed stress patterns. In addition the ART module was able to optimise certain non-linear parameters in order to improve the quality of fit between experiment and simulation.Note de contenu : - Rheological characterisation and choice of constitutive equation
- Prototype industrial flows (PIF)
- Numerical simulation
- The ART module
- Conclusions and future perspectivesDOI : 10.3139/217.1675 En ligne : https://drive.google.com/file/d/1-xYcLm5cmWTCdrcTRx-sugAgOaEiZqnR/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15955
in INTERNATIONAL POLYMER PROCESSING > Vol. XVII, N° 1 (03/2002) . - p. 3-10[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001019 - Périodique Bibliothèque principale Documentaires Disponible
