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The effect of fiber content and aspect ratio on anisotropic flow front and fiber orientation for injection-molded fiber composites / Huan-Chang Tseng in INTERNATIONAL POLYMER PROCESSING, Vol. 39, N° 1 (2024)
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Titre : The effect of fiber content and aspect ratio on anisotropic flow front and fiber orientation for injection-molded fiber composites Type de document : texte imprimé Auteurs : Huan-Chang Tseng, Auteur Année de publication : 2024 Article en page(s) : p. 47-58 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composites à fibres de verre -- Moulage par injection
Distribution et orientation des fibres
Polyamide 66
Prévision technologique
Simulation par ordinateurTags : 'composites de fibres moulés par injection' 'Orientation des coque-cœur' 'Front d'écoulement anisotrope' 'Effet propriétés fibres' 'Modèle couplé flux-fibre' Index. décimale : 668.4 Plastiques, vinyles Résumé : In state-of-the-art predictive engineering software for injection molded fiber composites, it is challenging to discuss the effect of fiber properties, including fiber content and aspect ratio, on the shell-core fiber orientation and anisotropic flow front. Recently, the flow-fiber coupled model of informed isotropic (IISO) viscosity was proposed for simulating the realistic flow-induced fiber orientation. At present, one attempts to improve the IISO viscosity in relation to fiber content and aspect ratio. Therefore, injection molding simulations of 30 wt% and 50 wt% short glass fiber-reinforced Polyamide66 (30 wt% SGF/PA66 and 50 wt% SGF/PA66) are performed in the IISO flow-fiber couple 3D-FVM (three-dimensional finite volume method) computation under the fixed aspect ratio of a r = 20. As a result, the predicted fiber orientation distributions are in good agreement with related experimental data, while the core width is increased with fiber contents. In addition, the anisotropic ear flow occurs at the higher content. Based on shear viscosity of 30 wt% SGF/PA66, one can directly alter fiber content as 50 wt% SGF/PA66 in the IISO computation to anticipate the reliable trend of fiber orientation and flow behavior. When the a r = 20 short fiber is lengthened as the a r = 50 long fiber, the core obviously becomes the wider. It is significant to investigate the difference between the decoupled and coupled computation, as well as the influence of the flow-fiber coupled and fiber orientation model parameters. Note de contenu : - THEORETICAL BACKGROUND : Cross-WLF shear viscosity model - IISO flow-fiber coupled viscosity - iARD-RPR fiber orientation equation
- RESULTS AND DISCUSSION : Used materials and experimental data - Difference between decoupling and coupling flow-fiber computations - Examination of IISO and iARD-RPR parameters - Effect of aspect ratio and fiber contentDOI : https://doi.org/10.1515/ipp-2023-4386 En ligne : https://drive.google.com/file/d/1FHWVafTKnDAQz_Nsyfj-h4kDRz2dWWhV/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40850
in INTERNATIONAL POLYMER PROCESSING > Vol. 39, N° 1 (2024) . - p. 47-58[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24673 - Périodique Bibliothèque principale Documentaires Disponible The effect on bending stiffness of drying leather under strain / E. J. Sturrock in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 1 (01-02/2002)
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Titre : The effect on bending stiffness of drying leather under strain Type de document : texte imprimé Auteurs : E. J. Sturrock, Auteur ; Geoffrey E. Attenburrow, Auteur ; C. Boote, Auteur ; K. M. Meek, Auteur Année de publication : 2002 Article en page(s) : p. 6-10 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Analyse
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de bovins
Distribution et orientation des fibres
Fibrilles de collagèneLa fibrille de collagène est une structure constituée d'un assemblage de fibres de tropocollagène (assemblage de 3 protéines de collagène alpha (alpha 1 - alpha 1 - alpha 2) en une hélice droite.
Flexion (mécanique)
Rigidité (physique)
Tannage au chromeIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Chrome tanned bovine leather has been dried under uniaxial strain and its relative bending modulus has been determined as a function of the amount of strain applied during drying and of the angle h between the test piece and the applied strain axis (long axis of sample). The orientation distribution of collagen fibres in the leather was also examined using wide angle X-ray diffraction at the Synchrotron Radiation Source at Daresbury. It was found that the bending modulus showed a marked dependence on both the amounts of applied strain and the angle h. This dependence could be understood in terms of the changes in fibre orientation caused by the action of the strain applied during drying. En ligne : https://drive.google.com/file/d/1Rz2BmW5Ts6-SUSDAetjFzo2iEagvlsTB/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40190
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 86, N° 1 (01-02/2002) . - p. 6-10[article]The relationship between the organoleptic properties of leather and the aggregate structure of collagen fibres / Ren Bianli in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 6 (11-12/2018)
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Titre : The relationship between the organoleptic properties of leather and the aggregate structure of collagen fibres Type de document : texte imprimé Auteurs : Ren Bianli, Auteur ; F. Qi, Auteur ; Chai Yuye, Auteur ; Lan Yunjun, Auteur ; Zou Xianglong, Auteur Année de publication : 2018 Article en page(s) : p. 289-292 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Collagène
Cuir -- Structure
Cuirs et peaux -- Finition
Cuirs et peaux -- Propriétés organoleptiques
Cuirs et peaux de moutons
Distribution et orientation des fibres
RetannageIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Sample of chromed sheep leather were prepared to establish the relationship between the organoleptic properties of leather and its structure after being retanned and oiled. The organoleptic properties and structure of them were characterized by stress-stain analysis, SEM and organoleptic test. The relationship was investigated from the point of fibre mobility. The results show that, when fibre bundles become thin and porosity increases, fibre mobility increases, as does softness, but tightness weakens. With the extent of fibre orientation decreasing, thicknessincreases, and smoothness decreases. Fullness is a special parameter related of leather thickness and fibre mobility. As collagen fibres have better motion capability when there is a decrease in the degree of orientation, fullness improves. Note de contenu : - MATERIALS AND METHODS : Materials - Methods - SEM observation - Extent of orientation of the collagen fibres - Organoleptic test
- RESULTS AND DISCUSSION : Effects of AR on the leather's organoleptic properties - Effects of AR on collagen fibres' aggregate structure - Analysis of the relationship between the organoleptic properties and the collagen fibres' aggregate structureEn ligne : https://drive.google.com/file/d/1fPHIhuT41jQwtelgmcgLpJ7L_V3uWDW_/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31322
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 102, N° 6 (11-12/2018) . - p. 289-292[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20391 - Périodique Bibliothèque principale Documentaires Disponible Wetlaid forming technology for glass fiber nonwovens / Leo Bos in CHEMICAL FIBERS INTERNATIONAL, Vol. 70, N° 1 (03/2020)
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Titre : Wetlaid forming technology for glass fiber nonwovens Type de document : texte imprimé Auteurs : Leo Bos, Auteur Année de publication : 2020 Article en page(s) : p. 49-51 Langues : Anglais (eng) Catégories : Distribution et orientation des fibres
Fibres de verre
Hydroenchevêtrement (nontissés)
Nontissés
TapisIndex. décimale : 677.6 Tissus obtenus par des procédés spéciaux, quelle que soit leur composition : jacquard, feutres tissés et non tissés, tapisseries, tissus ajourés Résumé : Glass fiber mats can be used for a very wide range of applications, and this is a growing market. Different types of lines are available — from small to large capacities. The following aspects are important for good web formation and lower consumption of expensive chemicals : Give the fibers enough room to move freely by applying sufficient turbulence to the water-fiber suspension ; lay the fibers with the best fiber orientation and ensure that they are well distributed ; double diffusor concept reduces the raw material costs. Note de contenu : - Good formation
- Give fibers space
- Keep the fibers moving
- Fiber laying with good distribution and orientationEn ligne : https://drive.google.com/file/d/1J183lTRzcXkfl5YZblT6NWg-wj8-n7ht/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33944
in CHEMICAL FIBERS INTERNATIONAL > Vol. 70, N° 1 (03/2020) . - p. 49-51[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21651 - Périodique Bibliothèque principale Documentaires Disponible Wetlaid forming technology for glass fiber nonwovens / Leo Bos in CHEMICAL FIBERS INTERNATIONAL, Vol. 70, N° 4 (12/2020)
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Titre : Wetlaid forming technology for glass fiber nonwovens Type de document : texte imprimé Auteurs : Leo Bos, Auteur Année de publication : 2020 Article en page(s) : p. 182-184 Langues : Anglais (eng) Catégories : Distribution et orientation des fibres
Fibres de verre
Formage
Nontissés
TapisIndex. décimale : 677.6 Tissus obtenus par des procédés spéciaux, quelle que soit leur composition : jacquard, feutres tissés et non tissés, tapisseries, tissus ajourés Résumé : Glass fiber mats can be used for a very wide range of applications, and this is a growing market. Different types of lines are available - from small to large capacities. The following aspects are important for good web formation and lower consumption of expensive chemicals : Give the fibers enough room to move freely by applying sufficient turbulence to the water-fiber suspension ; lay the fibers with the best fiber orientation and ensure that they are well distributed ; double diffusor concept reduces the raw material costs. Note de contenu : - Good formation
- Give fibers spece
- Keep the fibers moving
- Fiber laying good distribution and orientationEn ligne : https://drive.google.com/file/d/1PBP6Yyruu7LFAKrPRhIQU10mBpfbX6hl/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35041
in CHEMICAL FIBERS INTERNATIONAL > Vol. 70, N° 4 (12/2020) . - p. 182-184[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22511 - Périodique Bibliothèque principale Documentaires Disponible 22474 - Périodique Bibliothèque principale Documentaires Disponible When fibers mix with platelets / Sebastian Joas in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 12 (12/2019)
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PermalinkWood-polypropylene composites : influence of processing on the particle shape and size in correlation with the mechanical properties using dynamic image analysis / P. Sälzer in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIII, N° 5 (11/2018)
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