Force flux-maintaining spot connections / Holger Seidlitz in KUNSTSTOFFE INTERNATIONAL, Vol. 101, N° 3 (03/2011)

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 101, N° 3 (03/2011) . - p. 25-28 Titre : Force flux-maintaining spot connections Type de document : texte imprimé Auteurs : Holger Seidlitz, Auteur ; Lothar Kroll, Auteur ; Lars Ulke-Winter, Auteur Année de publication : 2011 Article en page(s) : p. 25-28 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Assemblages (technologie) Matières plastiques Métaux Index. décimale : 668.4 Plastiques, vinyles Résumé : Heavy-Duty Lightweight Structures - A hybrid construction principle for joining fiber-reinforced plastic composites and metals can be used to develop weightoptimized structures with high stiffness and load-bearing capability. For such applications, a novel joining process which maintains the force flux and, in addition, is suitable for mass production has been developed for high-performance applications. Note de contenu : - Joining technique for composite/metal structures - Thermo mechanically flow-formed connection Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11743 [article]

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FRP component design using forming simulations / Lothar Kroll in JEC COMPOSITES MAGAZINE, N° 115 (08-09/2017)  

[article]  inJEC COMPOSITES MAGAZINE > N° 115 (08-09/2017) . - p. 61-65 Titre : FRP component design using forming simulations Type de document : texte imprimé Auteurs : Lothar Kroll, Auteur ; Brands, Dennis, Auteur ; Brymerski, Wojciech, Auteur ; Haanappel, Sebastiaan, Auteur ; Meyer, Marcel, Auteur ; Wolfgang Nendel, Auteur Année de publication : 2017 Article en page(s) : p. 61-65 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Automobiles -- Matériaux Composites à fibres de verre Composites à fibres de verre -- Propriétés mécaniques Polyamide 6 Procédés de fabrication Stratifiés Index. décimale : 668.4 Plastiques, vinyles Résumé : The development of automotive components is governed by many criteria related to energy, materials and cost issues, as well as environmental requirements. These complex problems lead to the need for reliable simulation technologies to improve forming prediction and optimize complex assembled lightweight components using fiber-reinforced thermoplastic materials. During the first step of the investigation described in this paper, the developed simulation approach is shown to be able to determinate the optimum blank geometry for the manufacturing of parts, which leads to the best match with the designed part geometry. Finally, the adopted simulation method has shown its ability to perform virtual optimization of composite components. Note de contenu : - ASSEMBLED COMPOSITE COMPONENT : Component design - Manufacturing process - SIMULATION APPROACH FOR COMPOSITE LAMINATES : Simulation approach for composite laminates - Model input - Tooling input - Laminate structure input - Processing steps input - INVERTIGATION OF VIRTUAL AND ACTUAL FORMING : Validation of the formed component - Optimization potential by exploration - FIGURES : 1. Complex assembled lightweight battery carrier made of organo sheets, an injection-moulded rib component and metal bushings - 2. Complete process chain with ratating worktable for manufacturing a complex battery carrier - 3. AniForm shell element and input to simulate composite components - 4. Input and output data of the simulation - 5. Laminate blank and forming tool elements considered in the simulation model for composite components forming - 6. AniForm model's qualitative in-plane shear response at 270°C and three different extension speeds, as calibrated on "glass fibre/PA6" measurement data from bias extension experiments - 7. AniForm model's qualitative bending response at 270°C and three different bleding speeds, as calibrated on "glass fibre/PA6" measurement data from rhemeter bending experiments - 8. AniForm model's qualitative friction response at 270°C and three different sliding velocities, and three different normal pressures, as calibrated on "glass fibre/PA6" measurement data from friction experiments - 9. Raster grid on a composite component after forming ; deformation with a raster grid calculated by simulation - 10. Formed component with simulation of stresses and wrinkles ; simulation of the designed vs. simulated bottom part - 11. Optimized blank outline a nearly constant clearance with respect to the edge for a stable injection moulding process - 12. Comparison of the original blank with the optimized blank outline resulting from the simulation - 13. Alternative process configuration with new blank holder and changed forming direction - 14. Forming instances at 4 mm remaining tool travel for the initial and alternative process configurations En ligne : https://drive.google.com/file/d/1wVxlQM8gg-7zwizPSHSnTUqPgJymUAa4/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29202 [article]

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Getting results faster / Stefan Schierl in KUNSTSTOFFE INTERNATIONAL, Vol. 104, N° 10 (10/2014)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 104, N° 10 (10/2014) . - p. 94-97 Titre : Getting results faster : Processing combinations smooth the way for manufacturing lightweight fiber-reinforced Components with high-grade surfaces Type de document : texte imprimé Auteurs : Stefan Schierl, Auteur ; Roman Rinberg, Auteur ; Aleksandr Todorov, Auteur ; Lothar Kroll, Auteur ; Falk Broberg, Auteur Année de publication : 2014 Article en page(s) : p. 94-97 Langues : Anglais (eng) Catégories : Automobiles -- Habitacles Automobiles -- Matériaux Composites à fibres végétales Matériaux -- Allègement Matières plastiques -- Moulage par injection Polypropylène Index. décimale : 668.4 Plastiques, vinyles Résumé : Large-surface components reinforced with natural fibers, which are used for the interior trim of vehicles must be light and strong. In addition, they must be fitted with integral functional elements, and have high-quality surface coatings. Intelligent combination of the processing methods thermoforming, injection molding, and reaction technology enables these complex requirements to be met efficiently. Initial close-to-production tests have confirmed the compound strength of the three processes, and demonstrate their potential for industrial applications. Note de contenu : - Cycle times of about 60 seconds - From semi-finished fiber fleece to functional lightweight components - Material characterization of a sample component En ligne : https://drive.google.com/file/d/1d2De8Huige1qyEgco74MjcOpuDMe0YXd/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22355 [article]

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Interactive composite bridge / Sandra Gelbrich in KUNSTSTOFFE INTERNATIONAL, Vol. 105, N° 12 (12/2015)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 105, N° 12 (12/2015) . - p. 53-57 Titre : Interactive composite bridge : Lightweight bridge design demonstrated by the example of an interactive honeycomb bridge based on a GFRP sandwich structure Type de document : texte imprimé Auteurs : Sandra Gelbrich, Auteur ; Andreas Ehrlich, Auteur ; Enrico Rudolph, Auteur ; Meike Röhrkohl, Auteur ; Lothar Kroll, Auteur ; Matthias Pfalz, Auteur Année de publication : 2015 Article en page(s) : p. 53-57 Langues : Anglais (eng) Catégories : Composites à fibres de verre Construction sandwich Diodes électroluminescentes Eléments finis, Méthode des Matériaux -- Allègement Ponts -- Conception et construction Structure en nid d'abeilles Index. décimale : 668.4 Plastiques, vinyles Résumé : To create lightweight load-bearing structures, fiber-reinforced plastics (FRP) offer an excellent solution. But for efficient and sustainable use of FRP, it is important to ensure that the special characteristics of the material are correctly taken into account in design and production. Using the example of a free-formed arch bridge with adaptive lighting in Chemnitz, Germany, the potential of FRP for modern architecture is shown. Note de contenu : - Lightweight bridge construction - Load-Bearing translucent material - Design of an asymmetric arch bridge - Dimensioning and structural analysis - Production of the GFRP honeycomb sandwich modules - Integral stitched sensors control the lighting En ligne : https://drive.google.com/file/d/1-3G1atWQSh0OA9KFoxMC9DY6iog0X_t0/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25392 [article]

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Lean material mix for lightweight interiors / Christoph Menzel in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 5 (05/2017)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 5 (05/2017) . - p. 53-56 Titre : Lean material mix for lightweight interiors : Microsandwich made from a fiber-reinforced PP nonwoven and a PET foam core for vehicle trim components Type de document : texte imprimé Auteurs : Christoph Menzel, Auteur ; Benno Simon Stamp, Auteur ; Lothar Kroll, Auteur ; Roman Rinberg, Auteur ; Tobias Blumenstock, Auteur ; Hubert Bieder, Auteur Année de publication : 2017 Article en page(s) : p. 53-56 Langues : Anglais (eng) Catégories : Analyse thermique Automobiles -- Portières Construction sandwich -- Propriétés mécaniques Flexion (mécanique) Matériaux -- Allègement Matières plastiques dans les automobiles Mousses plastiques Nontissés Polyéthylène téréphtalate Polypropylène Index. décimale : 668.4 Plastiques, vinyles Résumé : The first series application of the lightweight material microsandwich in 2018 will reduce the weight of vehicle interior trim components by up to 50 %. The efficient one-shot process on existing manufacturing systems offers cost-effective component production by virtue of its short cycle times, as illustrated by the example of a door pocket. Note de contenu : - Foam reduces areal weight - Combination of material properties contributed by cover and core layers - Sample application : Door pocket - FIGURES : 1. Material structure of microsandwich composite systems consisting of PP nonwoven and a PET foam core including decorative material - 2. Results of dynamic scanning calorimetry (DSC) performed on the PP and PEt materials under N2 atmosphere - 3. Steps in the production of microsandwich components - 4. Results of a 4-point bending test on sample components made from PP-NF compact or NF-PP microsandwich (adapted from DIN 53293 - 5. Structure of door trim as illustrated by the Mercedes-Benz GI.C (X253) - 6. Primary energy requirements of door pockets made in compact and sandwich construction across the production, use and disposal phases En ligne : https://drive.google.com/file/d/1sqxPLsZzxLo90rPV27HqUHGKUlkSZyE1/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28725 [article]

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Luminous fibers as design elements in plastics parts / Franz Dziuba in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 12 (12/2018)  

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Ready for large-scale production / Wolfgang Stenbeck in KUNSTSTOFFE INTERNATIONAL, Vol. 106, N° 8 (08/2016)  

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Towards the functionalized FRP Tube / Udo Engelmann in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 12 (12/2017)  

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Vibro-acoustic design of composites / Olaf Täger in KUNSTSTOFFE PLAST EUROPE, Vol. 94, N° 11/2004 (11/2004)

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