The sound of materials / Johannes Benz in KUNSTSTOFFE INTERNATIONAL, Vol. 106, N° 11 (11/2016)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 106, N° 11 (11/2016) . - p. 46-49 Titre : The sound of materials : Acoustic emission analysis predicts damage and material failure Type de document : texte imprimé Auteurs : Johannes Benz, Auteur ; Fabian Willems, Auteur ; Christian Bonten, Auteur Année de publication : 2016 Article en page(s) : p. 46-49 Langues : Anglais (eng) Catégories : Composites à fibres de verre Détection de dommages (matériaux) Emission acoustique Polycarbonates Index. décimale : 668.4 Plastiques, vinyles Résumé : Although the first microdamage in a part occurs long before its total failure, the damage is extremely difficult to detect from outside. However, the Institut für Kunststofftechnik (IKT) is investigating a method using acoustic emission analysis to detect the onset of material-specific damage as precisely as possible. This permits an improved and more reliable design of components. Note de contenu : - Glass-fiber-reinforced polycarbonate under test - More sound events - Differentiation of sound events - FIGURES : 1. Stress-strain diagrams of the examined materials - 2. Diagram of the recorded sound events for PC reinforced with 20 wt. % short fibers - 3. Diagram of the recorded sound events for PC reinforced with 35 wt. % long fibers - 4. Reduction of sound events with cyclic loading PC-GF 20 - 5. Damage mechanisms in glass-fiber-reinforced polycarbonate - 6. Comparison between onset of damage and failure of the material En ligne : https://drive.google.com/file/d/1oA0k3iiD5Bed5B0clPmcz0hBgcZ4v8gZ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27519 [article]

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When fibers mix with platelets / Sebastian Joas in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 12 (12/2019)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 109, N° 12 (12/2019) . - p. 31-35 Titre : When fibers mix with platelets : Simulating the orientation behavior of additive mixtures Type de document : texte imprimé Auteurs : Sebastian Joas, Auteur ; Fabian Willems, Auteur ; Julian Kattinger, Auteur ; Marc Kreutzbruck, Auteur Année de publication : 2019 Article en page(s) : p. 31-35 Langues : Anglais (eng) Catégories : Composites à fibres de verre Cuivre Distribution et orientation des fibres Matières plastiques -- Additifs Microsphères Particules (matières) Simulation par ordinateur Index. décimale : 668.4 Plastiques, vinyles Résumé : Additives often consist of additive mixtures of heterogeneous components. Their anisometry leads to part properties that depend very strongly on the orientation of the additives. For this reason, it is essential to ‧describe such orientation behavior at an early phase of development when additized plastics parts are being designed. Note de contenu : - First model and measurements - Method for determining interaction coefficients - Determining the coefficients of interaction - Development of a simulation model - Fig. 1 : Interaction coefficient dependent on the product of filling ratio and aspect ration in various models and measurements - Schematic illustration of a Couette Rheometer - Fig. 3 Experimental procedure for determining interaction coefficients - Fig. 4 : Detection of filler orientation : color images taken on the microscope are extracted by binarizing the particle edges. Orientation is obtained from the particles modeled as ellipses, and the particle type using a threshold - Fig. 5 : Example for an orientation distribution function - Fig. 6 : Interaction coefficient for a mixture of glass microspheres and copper platelets - Fig. 7 : Interaction coefficient for a mixture of short glass fibers and copper platelets - Fig. 8 : Simulationi geometry of the flowed flat channel with cylindrical gap En ligne : https://drive.google.com/file/d/1KkrvZG3K9KVMpJ3G6mL--586aZ2NFIGq/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33716 [article]

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