The core layer is decisive / Didier Neuhaus in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 4 (04/2017)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 4 (04/2017) . - p. 40-43 Titre : The core layer is decisive : Influence of the wall thickness in fiber-reinforced plastic components Type de document : texte imprimé Auteurs : Didier Neuhaus, Auteur ; Bernard Masserey, Auteur ; Bruno Bürgisser, Auteur Année de publication : 2017 Article en page(s) : p. 40-43 Langues : Anglais (eng) Catégories : Composites à fibres de verre -- Propriétés mécaniques Distribution et orientation des fibres Eléments finis, Méthode des Matériaux -- Epaisseur Polybutylène téréphtalate Rhéologie Simulation par ordinateur Index. décimale : 668.4 Plastiques, vinyles Résumé : The mechanical properties of reinforced plastic components are not only influenced by the orientation of the fibers during the injection process but also by the wall thickness of the component. Rigidity deviations in a range up to 20 % are seen with wall thicknesses of 1 to 4 mm. Comparing the results of numeric simulations and experimental tests sheds light on this issue. Note de contenu : - Tensile tests with specimens - Analysis of the fiber layers - Simulation of the fiber orientation - Comparaison of pratical and theoretical results - Parallel or perpendicular to the flow direction - Practical implication - FIGURES : 1. Schematic layer structure : The fiber orientation in the edge layer (yellow fibers) differs from the core layer (red fibers) - 2. With the step-by-step variation of the wall thickness from 1 to 4 mm, the modulus of elasticity in the flow direction decreases by 4% while a significant increase of 16% is noted perpendicular to the flow direction - 3. Flow chart for transferring the fiber orientations from a rheological simulation to an FE analysis - 4 Comparison between the predicted fiber orientation using Autodesk Moldflow (RSC model) and the experimentally determined fiber orientation for a tie rod with a wall thickness of 4 mm - TABLES : 1. Thickness of the measured edge and core layers (plastic material : PBT-GF30) in proportion to overall wall thickness - 2. Comparison of the modulus of elasticity values from tensile tests and FE analysis (plastic material : PBT-GF30), here for specimens oriented parallel to the flow direction and different wall thicknesses - 3. Comparison of the modulus of elasticity values from tensile tests and FE analysis (plastic material : PBT-GF30), here for specimens oriented perpendicular to the flow direction and different wall thicknesses En ligne : https://drive.google.com/file/d/1KGDnCLM73UIMDzxqmHCOF0ZX1pXunvfo/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28481 [article]

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