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Thermal, morphological, rheological and deformation under mechanical loading analyses of recycled polyethylene terephthalates / Kivanc Bakir in INTERNATIONAL POLYMER PROCESSING, Vol. 37, N° 3 (2022)
[article]
Titre : Thermal, morphological, rheological and deformation under mechanical loading analyses of recycled polyethylene terephthalates Type de document : texte imprimé Auteurs : Kivanc Bakir, Auteur ; Deniz Aydemir, Auteur ; Timucin Bardak, Auteur ; Murat Emre Kartal, Auteur Année de publication : 2022 Article en page(s) : p. 287-302 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermique
Déformations (mécanique)
Eléments finis, Méthode des
Imagerie numérique
Matières plastiques -- Propriétés thermiques
Matières plastiques -- Recyclage
Morphologie (matériaux)
Polyéthylène téréphtalate
RhéologieIndex. décimale : 668.4 Plastiques, vinyles Résumé : This study aims at determining the mechanical deformation behavior of recycled poly (ethylene terephthalate) (r-PET) with digital image correlation (DIC) and finite element method (FEM), and to investigate the morphological, thermal, and rheological properties of r-PETs. Waste bottles were collected in trash bins and granulated with a cutter. Neat PET (n-PET) was also was used to determine accurately the changes in the properties of r-PET. PET test samples were obtained by injection molding at 260, 265, 270, and 275 °C. DIC and FEM were conducted to detect the deformation behavior of the PETs under mechanical loading. The data showed that the behavior of n-PETs and r-PETs were similar, and the stress distribution was found to densify in various areas for both PETs. The mechanical properties generally increased with increasing processing temperature, the best mechanical properties being obtained for thPETs processed at 275 °C. Scanning electron microscopy (SEM) analysis showed that the morphology of all the PETs were similar. Thermal stability was also found to be similar. The rheological moduli of n-PET processed at 260 °C were the highest, while processing r-PET at 275 °C improved its rheological properties. Note de contenu : - MATERIALS AND METHODS : Materials - Preparation of PET test samples - Methods
- RESULTS AND DISCUSSION : Mechanical properties of the PETs and the deformation analysis with DIC and FEM under mechanical testing - Morphological analysis - Thermal properties - Rheological properties
- Table 1 : TGA Data for n-PET and r-PET processed at different temperaturesDOI : https://doi.org/10.1515/ipp-2021-4165 En ligne : https://drive.google.com/file/d/13qTzJI31__flej8f48rzLT0zepAVN-Da/view?usp=shari [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37907
in INTERNATIONAL POLYMER PROCESSING > Vol. 37, N° 3 (2022) . - p. 287-302[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23738 - Périodique Bibliothèque principale Documentaires Disponible Thermoplastic composite wishbone : the future of automotive composites / Agnès Exertier in JEC COMPOSITES MAGAZINE, N° 82 (07/2013)
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Titre : Thermoplastic composite wishbone : the future of automotive composites Type de document : texte imprimé Auteurs : Agnès Exertier, Auteur ; Christian Fagiano, Auteur Année de publication : 2013 Article en page(s) : p. 40-43 Langues : Anglais (eng) Catégories : Automobiles -- Matériaux
Automobiles -- Pièces
Composites à fibres -- Surmoulage
Composites à fibres de carbone
Composites à fibres de verre
Composites thermoplastiques
Conception technique
Coût -- Contrôle
Eléments finis, Méthode des
Matériaux -- Allègement
Matières plastiques dans les automobiles
ProductionIndex. décimale : 668.4 Plastiques, vinyles Résumé : To meet weight-saving requirements in the automotive industry, composite materials need to comply with mechanical specifications while being able to meet this sector's cost and production rate requirements. In order to achieve these objectives, it is essential to take the process into account as early as the part design stage. Note de contenu : - Vehicle weight reduction an essential requirement to comply with European regulations
- The wishbone arm : an essential mechanical part
- FEA dimensioning
- An innovative process
- Well-designed assemblies
- Concept validation - simulation control
- High production rates for cost optimisation : the project is taking shapeEn ligne : https://drive.google.com/file/d/1H0EC_Zc5RE2En8yijmgXnrhT6xMKtYFW/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21045
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Code-barres Cote Support Localisation Section Disponibilité 15401 - Périodique Bibliothèque principale Documentaires Disponible A thermoplastic T-profile with effective lay-up in one shot / Josef Krena in JEC COMPOSITES MAGAZINE, N° 135 (07-08/2020)
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Titre : A thermoplastic T-profile with effective lay-up in one shot Type de document : texte imprimé Auteurs : Josef Krena, Auteur ; Zdenec Padovec, Auteur ; Radek Sedlacek, Auteur ; Tereza Zamecnikova, Auteur Année de publication : 2020 Article en page(s) : p. 27-29 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse des défaillances (fiabilité)
Eléments finis, Méthode des
Essais dynamiques
Fibres à orientation unidirectionnelle
ProfilésIndex. décimale : 668.4 Plastiques, vinyles Résumé : The range of applications of reinforced thermoplastics is growing, and there is a need to optimize the manufacturing process for these materials. This paper reports on a project conducted by Latecoere and the Czech Technical University in Prague to design and implement a quick process for manufacturing a T-profile with high mechanical performance in a required shape. The part was stamped in a sophoisticated tool, ensuring that the layers were positioned in a way that provides high strength. The stress analysis carried out by the finite element method (FEM) for a typical load was verified by mechanical testing. Note de contenu : - L-profiles versus T-profiles
- Innovative structure
- one-shot process
- Demonstrator
- Experiment
- Comparing the experiment and the FEM results
- Fig. 1 : Positions of the layers inside the profile
- Fig. 2 : Examples of T-profiles and Y-profiles
- Fig. 3 : A rib with a titanium T-profile and an alternative composite T-profile
- Fig. 4 : Failure index according to the maximum stress theory for a given lead applied to the Y-profile
- Fig. 5 : Specimen loaded in the testing machine
- Fig. 6 : Force/displacement graph for both tested profiles
- Fig. 7 : First failure area evaluated from a CT scan
- Fig. 8 : S33 stress field displayed at the surface of the profilePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35390
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Code-barres Cote Support Localisation Section Disponibilité 22570 - Périodique Bibliothèque principale Documentaires Disponible Three-dimensional finite element solution of the flow in single and twin-screw extruders / F. Ilinca in INTERNATIONAL POLYMER PROCESSING, Vol. XXV, N° 4 (09/2010)
[article]
Titre : Three-dimensional finite element solution of the flow in single and twin-screw extruders Type de document : texte imprimé Auteurs : F. Ilinca, Auteur ; J.-F. Hétu, Auteur Année de publication : 2010 Article en page(s) : p. 275-286 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Ecoulement tridimensionnel
Eléments finis, Méthode des
Extrudeuse bi-vis
Imagerie tridimensionnelleIndex. décimale : 668.9 Polymères Résumé : This work is aimed at the numerical modeling of the flow inside single and twin-screw extruders. Numerical solutions are obtained using a recently developed immersed boundary finite element method capable of solving the flow in the presence of complex non-stationary solid boundaries. The method is first validated against the solution obtained on a body-conforming grid for a single screw extruder and then applied to a twin-screw mixer. The time dependent single screw problem can also be solved in a rotating reference frame for which a steady state solution can be obtained. This allows the evaluation of time integration errors of the moving immersed interface algorithm. For instance the flow is considered isothermal and the material behaves as a Generalized Newtonian fluid. Because the viscosity depends on the shear rate, solutions will be shown for various rotation velocities of the screw and compared with solutions obtained on body-conforming grids. The method is shown to give very accurate results and can be used for a more in-depth investigation of the material behavior in extruders. DOI : 10.3139/217.2351 En ligne : https://drive.google.com/file/d/1iWUIP-2Z-d0vIVBdf6d6wmacgaM4k19P/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9824
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Code-barres Cote Support Localisation Section Disponibilité 012380 - Périodique Bibliothèque principale Documentaires Disponible Trailing edge formation during slot coating of rectangular patches / D. Maza in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
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Titre : Trailing edge formation during slot coating of rectangular patches Type de document : texte imprimé Auteurs : D. Maza, Auteur ; M. S. Carvalho, Auteur Année de publication : 2017 Article en page(s) : p. 1003-1013 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Eléments finis, Méthode des
Enduction par filière
Ligne de contact (chimie physique)(Chimie physique) Ligne correspondant à l’intersection apparente de deux interfaces contigües.
Médicaments -- Administration par timbres
Modèles mathématiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Different products, such as adhesives, pharmaceutical patches, batteries, and fuel cell membranes, require coating discrete patches onto moving substrates. For coating rectangular patches, intermittent slot die coating is the preferred method. The patches can be obtained by rapidly starting and stopping the flow out of the coating die. Controlling the flow start-up and shutdown to produce sharp and uniform leading and trailing edges of each patch is challenging. Different ways to control the liquid feeding are used to optimize the process. Even if the start-up and shutdown of the feeding system are well designed, the transient flow in the coating bead contributes to the formation of nonuniform leading and trailing edges of coated patches. In this work, we analyze how the operating conditions, die geometry, and liquid properties affect the coating bead breakup process and the trailing edge configuration. The process is directly related to the contact line dynamics. The results show that the uniformity of the trailing edge of each coated patch can be improved by changing the die shoulder angle and wetting characteristics of the die surface. DOI : 10.1007/s11998-017-9962-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9962-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29136
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible Vibration analysis of laminated composite plates with and without square holes under compressive loads / Bahi-Eddine Lahouel in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 23, N° 2 (05-06-07-08/2013)
PermalinkVirtual allowables approach for the design phase of a composite fuselage / Miraglia, Antonio in JEC COMPOSITES MAGAZINE, N° 115 (08-09/2017)
PermalinkVirtual testing of composite armour probabilistic penetration / Gaurav Nilakantan in JEC COMPOSITES MAGAZINE, N° 123 (08-09/2018)
PermalinkWeight and cost reduction with double-doble laminates / Stephen W. Tsai in JEC COMPOSITES MAGAZINE, N° 137 (11-12/2020)
PermalinkWrinkle free draping / Matthias Hübner in KUNSTSTOFFE INTERNATIONAL, Vol. 103, N° 9 (09/2013)
PermalinkX-ray computed tomography for assessment of mechanical properties and monitoring damage / Abderrahmane Ayadi in JEC COMPOSITES MAGAZINE, N° 113 (06/2017)
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