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Organo-sheet evolves from niche products to standards series production / Christian Götze in JEC COMPOSITES MAGAZINE, N° 109 (11-12/2016)  

[article]  inJEC COMPOSITES MAGAZINE > N° 109 (11-12/2016) . - p. 22-25 Titre : Organo-sheet evolves from niche products to standards series production Type de document : texte imprimé Auteurs : Christian Götze, Auteur Année de publication : 2016 Article en page(s) : p. 22-25 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Automobiles -- Matériaux Automobiles -- Portières Composites à fibres -- Surmoulage Composites à fibres -- Thermoformage Composites à fibres de verre Matériaux -- Allègement Index. décimale : 668.4 Plastiques, vinyles Résumé : The processing of organo-sheet into lightweight structural components featuring high strength and rigidity is now ready for standard series production, as illustrated by the production of a seat pan for a sports car in a fully automated production cell. The shell consists of blanks cut from organo-sheet, onto which reinforcing ribs, fastening elements and a glass fibre-reinforced plastic edging surround are moulded. Note de contenu : - The key to success : "marrying" thermoforming and injection moulding processes - LIPA : the answer to the market's needs - Thin organo sheet : a breakthrough in lightweight engineering - Market requirements and demands - FIGURES : 1. Manufactured from organo-sheet this seat pan is an example of the successful development of lightweight structural components all the way through to series production - 2. Production cell for the fully-automated manufacture of a lightweight seat pan made of organo-sheet with moulded-on reinforcing ribs - 3. Prototype of a car side impact protection component. No creases should form during the thermoforming of the organo-sheet - 4. Different versions of a door trim part produced from different organo-sheets in an experimental mould - 5. Demonstration component produced in a GK multi-purpose mould - 6. During the thermoforming of this bead-stiffened door module made of organo-sheet, holes are integrated into the part together with moulded-on fastening elements and a moulded-on edging surround En ligne : https://drive.google.com/file/d/1JR_WORB353W0GIJkskiaRLvZFw30KCpa/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28175 [article]

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Recent advances in powder coating technology for the RTM process / Anabel Crespo Soler in JEC COMPOSITES MAGAZINE, N° 109 (11-12/2016)  

[article]  inJEC COMPOSITES MAGAZINE > N° 109 (11-12/2016) . - p. 26-28 Titre : Recent advances in powder coating technology for the RTM process Type de document : texte imprimé Auteurs : Anabel Crespo Soler, Auteur Année de publication : 2016 Article en page(s) : p. 26-28 Langues : Anglais (eng) Catégories : Automobiles -- Matériaux Gelcoat Machines agricoles Matériaux -- Allègement Moulage par transfert de résine sous vide Revêtements poudre Index. décimale : 668.4 Plastiques, vinyles Résumé : The EU regulation on the CO2 emissions of new cars sets out the targets for the average new car fleet across Europe to achieve 95g/km by 2020. The challenge is to reduce the weight of vehicles to meet the EU CO2 emissions targets without incurring a cost penalty and, ideally, achieving cost savings. The business opportunity is to implement technologies and design solutions to deliver vehicle weight savings that are market ready for 2020. Major weight savings can be achieved by replacing conventional materials with composite materials. Composites can reduce vehicle weight, increase fuel efficiency and improve power-to-weight ratios, leading to an overall better performance. Note de contenu : - FIGURES : 1. a) Thickness comparison, liquid/powder gelcoat ; b) Microscopic section of a powder gelcoat - 2. The ecogel RTM process - 3. Temperature distribution on the heated skin just after opening the insulated hood - 4. Pilot plant homogeneous mould heating - 5. Door skin with an electrically-conductive in-mould primer - 6. Fully-finished cover for an agricultural machine - 7. LCA manufacturing phase - 8. LCA use phase - TABLES : 1. Ecogel target values vs. results obtained for powder gelcoat developments En ligne : https://drive.google.com/file/d/1HAseZyUEJbnVlAUmcYEcEwoVEzn6bYfV/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28176 [article]

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It's flow time ! / Andrew Biggs in JEC COMPOSITES MAGAZINE, N° 109 (11-12/2016)  

[article]  inJEC COMPOSITES MAGAZINE > N° 109 (11-12/2016) . - p. 29-30 Titre : It's flow time ! Type de document : texte imprimé Auteurs : Andrew Biggs, Auteur ; James Lees, Auteur Année de publication : 2016 Article en page(s) : p. 29-30 Langues : Anglais (eng) Catégories : Débimétrie Polymères Pompes Rhéologie Index. décimale : 668.4 Plastiques, vinyles Résumé : When it comes to pumping and metering, viscous resins pose many challenges for the aerospace, automotive and renewable energy industries. They are tricky substances to get absolutely right. For years, pumps and flowmeters have been major components in the painting and coating of products. With technology breakthroughs, more advanced pumps and flowmeters are now being used to dispense more complex fluids, such as special resins, carbon fibres and plastics, helping manufacturers meet the demand for faster, lighter, stronger, quieter and more fuel-efficient products. En ligne : https://drive.google.com/file/d/1YQNzN0131WqOxsZgDX-RBC18_Z9RA9Qy/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28177 [article]

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FPP technology : industrial end-to-end automation for complex preforms / Felix Michl in JEC COMPOSITES MAGAZINE, N° 109 (11-12/2016)  

[article]  inJEC COMPOSITES MAGAZINE > N° 109 (11-12/2016) . - p. 43-44 Titre : FPP technology : industrial end-to-end automation for complex preforms Type de document : texte imprimé Auteurs : Felix Michl, Auteur ; Neven Majic, Auteur Année de publication : 2016 Article en page(s) : p. 43-44 Langues : Anglais (eng) Catégories : Automatisation Composites à fibres de carbone Fibres à orientation unidirectionnelle Préformage Index. décimale : 620.1 Mécanique de l'ingénieur (mécanique appliquée) et matériaux Résumé : Fibre Patch Placement (FPP), the automated preforming technology that works with Ioad-path oriented patches to enable complex 3D fibre laminates, is taking the final step ta industrial use. Munich-based Cevotec is launching the first FPP production system at JEC World 2017. The process features end-to-end automation, including the handling of form-stable 3D carbon fibre preforms. Note de contenu : - Automated preform manufacturing - Preform stability - Removing the preform from the tool - Using standard gripper technology - FIGURES : 1. Gripper on complex geometry - 2. Gripper placing a patch, preform gripper over preform, preform gripper lifting preform - 3. Final helmet shell En ligne : https://drive.google.com/file/d/1kfKt8m7mEdhV6hmGKKHqfrdR0YBv45sQ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28178 [article]

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An innovative 3D placement technology / Marko Szcesny in JEC COMPOSITES MAGAZINE, N° 109 (11-12/2016)  

[article]  inJEC COMPOSITES MAGAZINE > N° 109 (11-12/2016) . - p. 46-47 Titre : An innovative 3D placement technology Type de document : texte imprimé Auteurs : Marko Szcesny, Auteur ; Wilhelm Rupertsberger, Auteur Année de publication : 2016 Article en page(s) : p. 46-47 Langues : Anglais (eng) Catégories : Automatisation Composites à fibres de carbone Coût -- Contrôle Structures tridimensionnelles Technique de la production Index. décimale : 620.1 Mécanique de l'ingénieur (mécanique appliquée) et matériaux Résumé : Within the EU-funded research programme LOWFLIP (LOW colt FLexible Integrated Process), the Institute of Aircraft Design and FILL GmbH developed a novel automated production process for carbon fibre composite parts. The main objective of the LOWFLIP process is the efficient automated manufacturing of fibre-reinforced parts with significantly reduced investment costs as well as low process energy consumption compared to state-of-the-art processes. Note de contenu : - Process technology - Cost reduction - Advantages - FIGURES : 1. Gripper and pressure roll system - length deviations are equalized by the segmented grippers while the pressure roll adapts to the mould surface, even on strongly curved geometries - 2. New generation direct ply placement - 3. The LOWFLIP prototype cell during the production of a truck front wall demonstrator En ligne : https://drive.google.com/file/d/1rRQku859wazmEr5ZZNTlPZ3XtHTYlqmO/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28179 [article]

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Non-destructive characterisation of composite microstructures / Robert A. Smith in JEC COMPOSITES MAGAZINE, N° 109 (11-12/2016)  

[article]  inJEC COMPOSITES MAGAZINE > N° 109 (11-12/2016) . - p. 59-61 Titre : Non-destructive characterisation of composite microstructures Type de document : texte imprimé Auteurs : Robert A. Smith, Auteur ; Ningbo Xie, Auteur ; Stephen R. Hallett, Auteur Année de publication : 2016 Article en page(s) : p. 59-61 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composites -- Analyse Contrôle non destructif Microstructures -- Analyse Simulation par ordinateur Index. décimale : 620.11 Matériaux (propriétés, résistance) Résumé : The UK's non-destructive testing community is developing game-changing composite inspecting technology to meet environmental challenges. Mapping of the microstructure could ensure conformance to design while enabling affordable and rapid manufacture. Note de contenu : - Fig. 1. Wedge specimen containing ply drops, made from 0.189 mm plies and incorporating 0.04 mm resin layers. a) Ultrasound-derived front-surface (red), back-surface (red) and resin-layer (green) locations ; b) X-ray CT slice ; c) ultrasount overlaid on X-ray CT. The ultrasound scan was performed with a 38 mm focal length spherical-focus probe with a 7.5 MHz nominal peak frequency - Fig. 2. Out-of-plane angular analysis of a 100 mm long section of a tapered carbon-fibre composite laminate - the same specimen and scan data as in figure 1. The colour represent the ply angle and the brightness is the superimposed instantaneous phase from which the ply angles were calculated - Fig. 3. Vector field data for the unit vector field parallel to the fibres with fibre-tow 'tubes" illustrating the wrinkling and in-plane waviness in each ply of a specimen with layup : [45,0, -45, 90, -45, 0, 45], showing (a) 90°, (b) 45° and (d) - 45° plies. Note the aspect ration used exaggerates out-of-plane distances with 10x magnification (image from reference[3]) - Fig. 4. Model generated for specimen from Fig. 3 with a tensile strain applied in the x direction. Colour shows U3 displacement in the laminate thickness direction. Red colours represent a positive displacement and blue represents a negative displacement - Fig. 5. Damage distributionof a 12° coupon : (a) photograph of initial coupon failure, (b) delamination prediction (colours), (c) matrix-cracking and fibre-kinking failure prediction (colours) - Fig. 6. Relationship between failure stress knock-down (colour scale in %) and maximum angle (vertical axis), as a function of the wrinkle amplitude and wavelength. Black 'x' locations represent the modelled values before interpolation. The extent of the wrinkled zone was kept the same throughout En ligne : https://drive.google.com/file/d/1dpw4rmQAgKR56kzzwZWjCX0Xmh69cTjy/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28180 [article]

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Structural certification analysis and reports for aircraft interiors / Warren Leigh in JEC COMPOSITES MAGAZINE, N° 109 (11-12/2016)  

[article]  inJEC COMPOSITES MAGAZINE > N° 109 (11-12/2016) . - p. 62-65 Titre : Structural certification analysis and reports for aircraft interiors Type de document : texte imprimé Auteurs : Warren Leigh, Auteur Année de publication : 2016 Article en page(s) : p. 62-65 Langues : Anglais (eng) Catégories : Avions -- Conception et construction Avions -- Habitacles Certification Conception technique Index. décimale : 620.1 Mécanique de l'ingénieur (mécanique appliquée) et matériaux Résumé : This article explains the process of creating an interface loads certification report and its required contents. This report provides the loads the airframe will experience at the attachment points of the interior unit depending on the various aircraft loadcases. For new graduate engineers, it is worth noting that this industry is always looking for certification stress engineers. Note de contenu : - CAD construction and stowage design - Construction of the FEA model - Panel meshing - Stowage unit attachment to aircraft seat rails - Fasteners - Materials - Load balance, model quality control - Aircraft and Patran-Nastran FEA coordinate systems - Loadcases applied to the stowage unit FEA model - FEA model quality and integrity - Model analysis - Model results and interface loads - FIGURES : 1. Aircraft stowage unit (2 side door version) outside CAD rendition - 2. Individual panel FEA models each with a uniform density mesh - 3. Position of feet attachment to seat rails of aircraft - 4. Stowage unit structure self-weight applied per node for 9g loadcase - 5. Coat,magazine rack and floor baggage position for 9g loadcase - 6. Initial check of PEA model - stress results - 7. The two feet on floor panel - 8. Load vectors on Foot 1 - 9. Load vectors applied at feet - TABLES : 1. Centre of gravity derivation by hand calculation - 2. Loadcases - 3. Magnitudes ofload vectors on Foot 3 - 4. Load Balance check for combined centre of gravity and mass En ligne : https://drive.google.com/file/d/1gRUPQHPQN07_QhkJhZu-KO_8s2dBDfwh/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28181 [article]

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