Adhesion promoter for unequal pairs / Tobias Kleffel in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 10 (10/2017)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 10 (10/2017) . - p. 80-83 Titre : Adhesion promoter for unequal pairs : Primer joins metal and plastic components with adhesive bond Type de document : texte imprimé Auteurs : Tobias Kleffel, Auteur ; Karl Kuhmann, Auteur ; Dietmar Drummer , Auteur Année de publication : 2017 Article en page(s) : p. 80-83 Langues : Anglais (eng) Catégories : Assemblages collés Automobiles -- Pièces Essais dynamiques Matériaux -- Allègement Matières plastiques Matières plastiques dans les automobiles Métaux Promoteurs d'adhésion Torsion (mécanique) Index. décimale : 668.4 Plastiques, vinyles Résumé : Plastic/metal hybrid structures for industrial applications have been established for years, e. g. for front-end carriers in automotive vehicles. Previously, in assembly injection molding joints were based on form/force fit or friction locking. Novel adhesion promoters now permit adhesive bonding of hybrid structures with improved component properties. Note de contenu : - The hylight process - Confirmed by close-to-production tests - Weight savings of some 20 percent possible - FIGURES : Established plastic/metal hybrid structures : front-end carriers, for example, are mounted in automobiles (here in the Ford C-MAX) as mass-produced lightweight hybrid components - 1. Improved component properties : concepts for joining metal and plastic components and their characteristics - 2. Erlanger carrier : the model component combines important design features of series parts, thereby permitting complex components tests - 3. Hylight process : the processing chain for producing plastic/metal hybrid components - 4. Test setup : hood latch test and torsion test - 5. Overview of the front-end carrier's performance increase - 6. Ford C-MAX test vehicle with integral hylight front-end carrier En ligne : https://drive.google.com/file/d/1Tdc8N1wXGFf1zorgppg9M9fo7JNc_zR3/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29287 [article]

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Influence of stitching parameters on the joint strength of welded-stitched composites / Lisa-Maria Wittmann in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIII, N° 5 (11/2018)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXXIII, N° 5 (11/2018) . - p. 706-713 Titre : Influence of stitching parameters on the joint strength of welded-stitched composites Type de document : texte imprimé Auteurs : Lisa-Maria Wittmann, Auteur ; Tobias Kleffel, Auteur ; Dietmar Drummer Année de publication : 2018 Article en page(s) : p. 706-713 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composites à fibres Couture Polypropylène Soudage Soudures Température Index. décimale : 668.4 Plastiques, vinyles Résumé : Regarding the necessity of lightweight construction, performance and design, composites are well established. At this moment, the joining of these composites still is often a major challenge. While suitable technologies like welding, sticking or riveting do exist, there are several drawbacks of these technologies such as damaging the fiber structure and low bonding strength. The combination of welding and sewing is a novel approach to improve the bonding of glass fibre-reinforced polypropylene and the influence of the processing parameters is not yet well understood. This study aims at analyzing the influence of parameters such as operating temperature, overlap length, needle temperature and thread material on the tensile strength of thermoplastic composites joined in the previously described hybrid approach. Furthermore, the interaction between thread and composite material is investigated by a microscopical analysis. The joint strength has been found to depend on the overlap length of the joint and the results suggest a contribution of the seam to the joint strength, especially for lower overlap lengths. Influences of the processing temperature, the thread material and needle temperature are also present, however, due to the complex interaction, no systematic conclusions could be drawn for these yet. The optical analysis confirms the findings of thermoset composites stitched before impregnation, where additional seams cause dislocations and local agglomeration of fibers. Additional investigations are necessary to determine the effect of the stitching on the joint and to further the understanding of the interaction between composite and thread material. Note de contenu : - MATERIAL AND METHODS : Material - Stitching-process - Tensile test - Microscopical analysis - RESULTS AND DISCUSSION : Joint strength - Microscopical analysis DOI : 10.3139/217.3518 En ligne : https://drive.google.com/file/d/1ItGkRQ1gYZH-2Hdahkdlkqx42eZYpTz6/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31410 [article]

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Micrometer accurate measurement of tooth wear / Bernhard Gierl in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 9 (09/2019)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 109, N° 9 (09/2019) . - p. 107-109 Titre : Micrometer accurate measurement of tooth wear : Application-specific in-situ transmission testing of injection molded plastic gears Type de document : texte imprimé Auteurs : Bernhard Gierl, Auteur ; Sebastian Hertle, Auteur ; Tobias Kleffel, Auteur ; Dietmar Drummer , Auteur Année de publication : 2019 Article en page(s) : p. 107-109 Langues : Anglais (eng) Catégories : Déformations (mécanique) Engrenages Essais dynamiques Mesure Transmission (mécanique) Usure (mécanique) Index. décimale : 668.4 Plastiques, vinyles Résumé : Until now, the dimensioning of plastic gear required the measurement of the tooth selectively and manually before, during and after a transmission test. A newly developed in-situ transmission test bench makes it possible to investigate tooth deformation and wear behavior quasi-continuously during the transmission test, thus reducing effort and operator influence. Non-linear behavior can also be better detected. Note de contenu : - The limits of conventional methods - High-resolution in-situ transmission testing - In-situ transmission testing versus manual measurement - Fig. 1 : Schematic representation of real and interpolated tooth width reduction during the running-in phase and stationary phase in accordance - Fig. 2 : In-situ transmission test bench with identification of the main components - Fig. 3 : Comparison of manually and in-situ measured gear tooth wear - Fig. 4 : Example of an in-situ measurement of tooth width decrease over test time En ligne : https://drive.google.com/file/d/1QVH_Y75BMQBqfaLWU8omVQ0VnJKADBSh/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33176 [article]

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