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High-performance creations / Rosen, David in JEC COMPOSITES MAGAZINE, N° 115 (08-09/2017)  

[article]  inJEC COMPOSITES MAGAZINE > N° 115 (08-09/2017) . - p. 22-23 Titre : High-performance creations : additive manufacturing and composites Type de document : texte imprimé Auteurs : Rosen, David, Auteur ; Doetzer, Florian, Auteur Année de publication : 2017 Article en page(s) : p. 22-23 Langues : Anglais (eng) Catégories : Composites Impression tridimensionnelle Index. décimale : 668.4 Plastiques, vinyles Résumé : This article focuses on the combination of additive manufacturing (AM)and composites. In fact, we all know that composites manufacturing is "additive" by definition. CCS and SUTD started exploring the inegration of additive manufacturing and composites in order to develop specific design guidelines and rules. This paper is the first of a series of articles highlighting the opportunities of integrating both technologies, as well as examples of implementation. Note de contenu : - Non-isotropic properties versus complexity and customization - What applications would benefit most from such a combination of manufacturing technologies ? - FIGURES : 1. Synergies between AM and Composites - 2. Examples for AM/Composite components, helicopter tail-rotor shaft and H2 pressure vessel with integrated end-caps En ligne : https://drive.google.com/file/d/1AYsHyu4ytgUYihZWwG5CKSERSEaM74qL/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29164 [article]

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Hollow HP-RTM carbon fiber parts / Jansen, Tobias in JEC COMPOSITES MAGAZINE, N° 115 (08-09/2017)  

[article]  inJEC COMPOSITES MAGAZINE > N° 115 (08-09/2017) . - p. 24-27 Titre : Hollow HP-RTM carbon fiber parts Type de document : texte imprimé Auteurs : Jansen, Tobias, Auteur Année de publication : 2017 Article en page(s) : p. 24-27 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composites à fibres de carbone Corps creux Motocyclettes -- Matériaux Moulage par transfert de résine sous vide Index. décimale : 668.4 Plastiques, vinyles Résumé : Along with several partners, Hennecke developed a process to produce complex-geometry hollow HP-RTM parts combining epoxy or PU resin systems with woven or sheet carbon fiber materials. The process uses a sand core that can withstand pressures up to 200 bar and is held together by a binder. This binder is eco-friendly and can be flushed out with regular water and without any solvents. Even better, the core material is 98% recyclable. Note de contenu : - HP-RTM technology - CAVUS technology - R.A.C.E project - FIGURES : 1. RTM process flow - 2. Cavus process flow - 3. license plate holder design study - 4. Final license plate holder mounted on the KTM 1290 Super Duke - 5. Simulation of the braiding process - 6. Simulation of the injection process - 7. Sand dissolving process - 8. Snapcure effect of the Vitrox system - 9. HP-RTM tool with Murlock sealing En ligne : https://drive.google.com/file/d/1uE7ErFoV-eowWvg77Eg8hpYL4WrmL46I/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29165 [article]

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In-line coated profiles : optimizing the pultrusion process / Nora Lardiès Miazza in JEC COMPOSITES MAGAZINE, N° 115 (08-09/2017)  

[article]  inJEC COMPOSITES MAGAZINE > N° 115 (08-09/2017) . - p. 28-30 Titre : In-line coated profiles : optimizing the pultrusion process Type de document : texte imprimé Auteurs : Nora Lardiès Miazza, Auteur Année de publication : 2017 Article en page(s) : p. 28-30 Langues : Anglais (eng) Catégories : Capteurs (technologie) Composites Formulation (Génie chimique) Micro-ondes Polyesters Polymérisation Primaire (revêtement) Procédés de fabrication Pultrusion Thermométrie Index. décimale : 668.4 Plastiques, vinyles Résumé : The pultrusion process in an effective way to process composites, however several drawbacks that reduce the competitiveness of pultruded profiles in comparaison to traditional materials still need to be addressed. On the one hand, the process is limited by the time required to polymerize the resin inside the die, which results in a low-speed process. On the other hand, when a coating is needed to improve surface properties, the surface of this profile must be carefully prepared off-line, requiring additional sanding and painting steps that are expensive, highly labour-intensive and polluting. Note de contenu : - Creating a specific microwave antenna for the pultrusion die - Formulating the resin with the necessary microwave susceptors - Modelling the pultrusion process for die design - Developing a specific sensor system to continuously monitor the curing degree of the resin and coating inside the pultrusion mould - Manufacturing the molds and integrating all the subsystems - Formulating a fast-curing primer to coat the composite profile and foster the adhesion of a debondable adhesive - FIGURES: 1. Antenna MW for the curing of the ALKE's profile (automotive sector) - 2. Open antenna system available in AIMPLAS' facilities and temperature vs. time for the curing of the polyester resin with susceptor C - 3. First curved sensor developed for an in-line process - 4. The real-time temperature measurements of the 4 heating zones together with the temperature at the Microwave heating area and the profile speed are displayed - 5. Online prediction of the degree of cure from the 4 cure sensors. At the top right-hand-side the real-time degree of cure are displayed for the 2 sensors in the resin region and the other 2 cure sensors at the primer area - 6. First coated pultrusion profile obtained in-line - 7. Assembly of the full cargo bed by adhesive join and easy debonding picture En ligne : https://drive.google.com/file/d/12IuSL86RZkzKNJgfIO_B9aZ9IFggERka/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29170 [article]

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Arkema 3 Mini 6.50 : a model of innovation / Roucayrol, Lalou in JEC COMPOSITES MAGAZINE, N° 115 (08-09/2017)  

[article]  inJEC COMPOSITES MAGAZINE > N° 115 (08-09/2017) . - p. 41-43 Titre : Arkema 3 Mini 6.50 : a model of innovation Type de document : texte imprimé Auteurs : Roucayrol, Lalou, Auteur ; Neyhousser, Romaric, Auteur ; Pierre Gérard, Auteur ; Cledat, Guillaume, Auteur Année de publication : 2017 Article en page(s) : p. 41-43 Langues : Anglais (eng) Catégories : Bateaux -- Matériaux Composites à fibres de carbone -- Moulage par infusion Composites à fibres de carbone -- Propriétés mécaniques Composites thermoplastiques -- Moulage par infusion Construction sandwich Epoxydes Essais dynamiques Fibres à orientation unidirectionnelle Polyacryliques Index. décimale : 668.4 Plastiques, vinyles Résumé : The Arkema 3 Mini 6.50 brings together a large number of innovations in terms of construction as well as a new high-performance liquid and reactive thermoplastic resin, Elium by Arkema. It is often said that the Mini 6.50 class is a laboratory for offshore racing. The Mini 6.50 prototype, designed by Romaric Nayhousser and built by Lalou Multi, confirms this concept more than ever. Note de contenu : - A revolutionary rig - Adjustable foils in line with the times - A hull with a rounded bow suitable for foils - A self-supporting bowsprit that retracts inside the boat - Innovative resins and other high-performance materials - FIGURES : 1. Tensile property retention versus degree of saturation with sea water, acrylic and epoxy matrix resins - 2. Infusion of Elium resin to produce the Arkema 3 Mini 6.50 prototype - 3. The mini 6.50 Arkema 3 skippered by Quentin Vlamynck - TABLES : 1. Properties of the Elium resin used for the Arkema 3 Mini 6.50 ( polymerization at room temperature + annealing at 60°C for 24 hours ) - 2. Creep behaviour of UD carbon / Elium versus UD carbon / epoxy En ligne : https://drive.google.com/file/d/1bm8wP_C9-O5F2BlhJd_nUbZPA77h1HMe/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29186 [article]

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Fastening solutions for marine composites / Cowell, Martin in JEC COMPOSITES MAGAZINE, N° 115 (08-09/2017)  

[article]  inJEC COMPOSITES MAGAZINE > N° 115 (08-09/2017) . - p. 46-47 Titre : Fastening solutions for marine composites Type de document : texte imprimé Auteurs : Cowell, Martin, Auteur Année de publication : 2017 Article en page(s) : p. 46-47 Langues : Anglais (eng) Catégories : Bateaux -- Matériaux Composites à fibres de carbone Fixations Index. décimale : 668.4 Plastiques, vinyles Résumé : For bonding fastener solution provider bigHead, marine industry applications follow many of the same characteristic requirements as other industries where composite materials are being increasingly used for structures, components and panels. The company offers efficiency and cost saving in manufactured parts and assemblies, as well as the flexibility required for design innovation - especially when they are engineered-in at the earliest stages of a project. Note de contenu : - A high-strengh fastening solution - Various applications - Other industries En ligne : https://drive.google.com/file/d/1kmhCbHmBuWfdoTCfW-nOjFyrMNfEQ80y/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29187 [article]

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Repair against the clock / Stray, Gary in JEC COMPOSITES MAGAZINE, N° 115 (08-09/2017)  

[article]  inJEC COMPOSITES MAGAZINE > N° 115 (08-09/2017) . - p. 50-52 Titre : Repair against the clock Type de document : texte imprimé Auteurs : Stray, Gary, Auteur Année de publication : 2017 Article en page(s) : p. 50-52 Langues : Anglais (eng) Catégories : Bateaux -- Entretien et réparations Composites à fibres de carbone -- Moulage par infusion Mousses plastiques Structure en nid d'abeilles Index. décimale : 668.4 Plastiques, vinyles Résumé : At the last offshort racing catamaran championship, the Miss Geico Race Team had to manage a huge repair of its boat hull during the competition. Thanks to the mouldability of composites and a team of experts, they went through this challenge with panache. Note de contenu : - Running against the clock - Good infusion in a tight time frame - Bonding the part - FIGURES : 1. The impressive damage to the Miss Geico Team boat hull - 2. The mould made from the Maritima Race Team hull - 3. The mould with wax sheets to simulate the carbon tapes used to attach the part of the hull - 4. The carbon fibre layup - 5. Placing the core material - 6. Ready for infusion - 7. A high-resolution vaccum gauge to ensure the best result - 8. The final repair En ligne : https://drive.google.com/file/d/1RyHWgw1CsJZl3EW0LJLTgPtJd7pElixD/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29188 [article]

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Virtual allowables approach for the design phase of a composite fuselage / Miraglia, Antonio in JEC COMPOSITES MAGAZINE, N° 115 (08-09/2017)  

[article]  inJEC COMPOSITES MAGAZINE > N° 115 (08-09/2017) . - p. 58-60 Titre : Virtual allowables approach for the design phase of a composite fuselage Type de document : texte imprimé Auteurs : Miraglia, Antonio, Auteur ; Malacaria, Danilo, Auteur ; Giugno, Matteo, Auteur Année de publication : 2017 Article en page(s) : p. 58-60 Langues : Anglais (eng) Catégories : Analyse des défaillances (fiabilité) Analyse multiéchelle Avions -- Fuselage Avions -- Matériaux Composites à fibres Eléments finis, Méthode des Matériaux -- Allègement Index. décimale : 668.4 Plastiques, vinyles Résumé : The development of a new composite materials in the aerospace field has been limited due to high cost and time impacts against their promise of lightweighting advantages and optimization of tailored design space. Advancement in non-linear finite element analysis methods with a multiscale approach let virtual testing approach a new challenging scenario that can enhance physical testing. Note de contenu : - Design and industrialization - Validated procedure - Strengh and stiffness - Material and process - FIGURES: 1. Contoured fuselage barrel - 2. Project phases - 3. Digimat-VA shell - 4. Virtual specimen - 5. Virtual allowable comparison - 6. Failure index map En ligne : https://drive.google.com/file/d/13SrZwNKvHr4hrHiilBgYtV3tziFeuwJ8/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29189 [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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