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Crossing Australia almost exclusively on wind energy / Ursula Keil in JEC COMPOSITES MAGAZINE, N° 67 (08-09/2011)
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Titre : Crossing Australia almost exclusively on wind energy Type de document : texte imprimé Auteurs : Ursula Keil, Auteur Année de publication : 2011 Article en page(s) : p. 18 Langues : Anglais (eng) Catégories : Automobiles électriques -- Conception et construction
Composites à fibres de carbone
Construction sandwich
Energie éolienne
Matériaux -- Allègement
Plastiques alvéolaires
PolyméthacrylimideIndex. décimale : 668.4 Plastiques, vinyles Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17281
in JEC COMPOSITES MAGAZINE > N° 67 (08-09/2011) . - p. 18[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13510 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Customized foam : Process variant of foam injection molding opens up new lightweight construction potential Type de document : texte imprimé Auteurs : Mike Tromm, Auteur ; Hans-Peter Heim, Auteur Année de publication : 2018 Article en page(s) : p. 26-28 Langues : Anglais (eng) Catégories : Matériaux -- Allègement
Mousses plastiques -- Moulage par injection
Procédés de fabricationIndex. décimale : 668.4 Plastiques, vinyles Résumé : With special mold technology and process control, it is possible to produce parts with locally highly foamed structures. The foam can considerably extend the limited design freedom of compact molded and conventionally foamed parts. Hence, extremely abrupt changes in wall thickness can be achieved and conventional design guidelines for ribs circumvented. Variothermal process control ensures excellent surfaces here. Note de contenu : - Lightweight construction potential is not yet exhausted
- Precision opening restricted to specific mold areas
- Hydraulic cylinder changes cavity volume inside the closed mold
- Abrupt changes in wall thickness and surfaces as required
- FIGURES : 1. Comparison of processes : the conventional foam injection molding in contrast to the high-pressure foam injection molding in combination with precision mold-opening - 2. Principles behind the pull an foam process : after volumetric mold filling, a section of the cavity is enlarged. The pressure drop initiated this way allows the blowing agent to expand locally to a greater extent - 3. The special features of the new experimental mold are the locally variable cavity volume and a variothermal insert - 4. Schematic diagram, locally expanded part and cross-sectional cut through an expanded rib area : the widest rib, at 10 mm, has been expanded five-fold here - 5. Variothermal temperature cycle with brief heating by 100K (from 90°C to 190°C) and subsequent cooling to th estandard mold temperature with the corresponding thermographic images of the mold. The positive influence on the surface quality is clear to see - 6. Cell size as a function of the process parameters : the results of the test plan show that, within the process window selected, the cell size and density can be influenced by a factor of 10En ligne : https://drive.google.com/file/d/1hnY4cFcH4KKxS58jy0iUc-KiDr1ZOIb1/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30086
in KUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 1-2 (01-02/2018) . - p. 26-28[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19625 - Périodique Bibliothèque principale Documentaires Disponible Customized structural adhesives deliver multiple benefits / Ana Wagner in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 23, N° 9 (09/2016)
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Titre : Customized structural adhesives deliver multiple benefits : Structural adhesives help automotive manufacturers meet existing and upcoming global regulations for fuel efficiency and CO2 emissions Type de document : texte imprimé Auteurs : Ana Wagner, Auteur Année de publication : 2016 Langues : Américain (ame) Catégories : Adhésifs dans les automobiles
Adhésifs structuraux
AluminiumL'aluminium est un élément chimique, de symbole Al et de numéro atomique 13. C’est un métal pauvre, malléable, de couleur argent, qui est remarquable pour sa résistance à l’oxydation13 et sa faible densité. C'est le métal le plus abondant de l'écorce terrestre et le troisième élément le plus abondant après l'oxygène et le silicium ; il représente en moyenne 8 % de la masse des matériaux de la surface solide de notre planète. L'aluminium est trop réactif pour exister à l'état natif dans le milieu naturel : on le trouve au contraire sous forme combinée dans plus de 270 minéraux différents, son minerai principal étant la bauxite, où il est présent sous forme d’oxyde hydraté dont on extrait l’alumine. Il peut aussi être extrait de la néphéline, de la leucite, de la sillimanite, de l'andalousite et de la muscovite.
L'aluminium métallique est très oxydable, mais est immédiatement passivé par une fine couche d'alumine Al2O3 imperméable de quelques micromètres d'épaisseur qui protège la masse métallique de la corrosion. On parle de protection cinétique, par opposition à une protection thermodynamique, car l’aluminium reste en tout état de cause très sensible à l'oxydation. Cette résistance à la corrosion et sa remarquable légèreté en ont fait un matériau très utilisé industriellement.
L'aluminium est un produit industriel important, sous forme pure ou alliée, notamment dans l'aéronautique, les transports et la construction. Sa nature réactive en fait également un catalyseur et un additif dans l'industrie chimique ; il est ainsi utilisé pour accroître la puissance explosive du nitrate d'ammonium.
Assemblages collés
Collage structural
Composites
Epoxydes
Matériaux -- AllègementIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : Automotive and commercial transportation manufacturers must design and produce vehicles that meet both consumer expectations and government standards for safety, comfort, performance, and sustainability. These expectations are continually evolving and vehicles must closely follow if not lead the trend.
For example, environmental impacts now are a central consideration in vehicle development, both in terms of fuel efficiency and CO2 emissions throughout the vehicle’s lifecycle, which can be up to 15 years. This has led to a revolution in vehicle design, bringing in new lightweight materials to replace and partner with more than 100 years of stand-alone steel.
Simultaneously, safety requirements for passenger vehicles are also rising, which often results in solutions that add weight. Thus, while manufacturers are trying to design lighter vehicles, they have to comply with safety standards that vary by global region. This conflict is also seen around issues such as automation, expanded electronic capabilities and interior comfort. Customers want more, but that can add weight and other complexities to the vehicle.
Lightweight materials help solve environmental concerns, but they also require changes in the complex manufacturing and design process. Traditional assembly techniques, such as welding and mechanical fastening, are incompatible for many lightweight materials, and customers are looking for partners to collaborate on workable solutions that meet multiple objectives, including efficiency, cost, speed, longevity, comfort, and durability.Note de contenu : - Structural Adhesives for Lightweighting
- Composite-to-Metal Bonding
- Aluminum Bonding
- Commercial Vehicles
- Driving Innovation
- FIGURES : 1. The Ford F-150 uses structural adhesives for durability, weight reduction and improved manufacturing efficiencies - 2. One- and two-component epoxy structural adhesives provide high-performance bonding to steel, aluminum, and other materials to enhance stiffness, NVH, crash, and durability performance - 3. Structural adhesives can be used in injection bonding to address specific production requirements, such as open times and cycle times, without affecting mechanical properties - 4. Composite bonding adhesives enable significant weight reduction, acoustic performance and corrosion protection - 5. Structural adhesives improve vehicle safety by managing the energy distributed in a crash and enable weight savings. At left, the crush tower has no structural adhesive. At right, the tower is made of lighter gauge steel (difference of 0.2 mm) and bonded with structural adhesives (shown in blue)En ligne : http://www.adhesivesmag.com/articles/94867-customized-structural-adhesives-deliv [...] Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28956
in ADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 23, N° 9 (09/2016)[article]Cutting-edge FDC technology reduces costs and CO2 emissions / Manuel Wöhrle in JEC COMPOSITES MAGAZINE, N° 147 (09-10/2022)
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Titre : Cutting-edge FDC technology reduces costs and CO2 emissions Type de document : texte imprimé Auteurs : Manuel Wöhrle, Auteur Année de publication : 2022 Article en page(s) : p. 32-34 Langues : Anglais (eng) Catégories : Composites à fibres de verre -- Moulage par injection
Composites à fibres de verre -- Propriétés mécaniques
Coût -- Contrôle
Fibres longues
Matériaux -- Allègement
Mélanges de fibresIndex. décimale : 668.4 Plastiques, vinyles Résumé : The innovative fibre direct compounding (FDC) process from Arburg has been a recognized alternative to moulding pre-compounded long-galss-filled materials since at least 2012, and its area of application is expanding. It develops better prpoerties and can cut costs and CO2 emissions. The idea is to take glass fibre strands, cut them to length and feed them into the barrel of an injection moulding machine, where they ix with neat resin before the resulting compound is injected into a mould. Note de contenu : - Predestined for the automotive industry
- Resource-saving lightweight construction
- Improved mechanical properties
- FDC versus long-fibre granulate
- Lower cost, lighter weight
- Hybrid processing with FDCPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39275
in JEC COMPOSITES MAGAZINE > N° 147 (09-10/2022) . - p. 32-34[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23697 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Cutting the gordian knot : A start-up and five partners from industry and research are developing a steamless process chain for energy-efficient processing and in-situ functionalization of particle foams Type de document : texte imprimé Auteurs : Clemens Doriat, Auteur Année de publication : 2017 Article en page(s) : p. 17-20 Langues : Anglais (eng) Catégories : Economies d'énergie
Matériaux -- Allègement
Matières plastiques dans les automobiles
Mousses plastiques
PolystyrèneIndex. décimale : 668.4 Plastiques, vinyles Résumé : Particle foam processing - Up to now, the prevailing opinion has been that processing of Styrofoam and similarly cellular materials requires complex processes involving steam. Two engineers have now come up with a dry solution that slashes energy consumption. Not only that, but the duo have also devised a production-ready lightweight engineering approach, namely on how foams can offer new application perspectives the automotive industry is desperately looking for. Note de contenu : - 98 percent air wrapped in a plastic cellular structure
- Initial skepticism overcome
- Pouring out front, snowing out back
- Dynamic tempering via a narrow-meshed runner network
- Lightweight engineering in its purest form
- Embossed, reinforced and decorated
- Foam on wheels ?
- FIGURES : 1. Steamless-manufactured EPS demonstrator ("Filli Future") with micro-precision surface texturing, PS film decoration on the rear, and gently molded-in-functional unit with neodynium magnets, LED array, control board and inductive charging coil - 2. Up to now, steam has been used for prefoaming of EPS microbeads and fusion othe foamed beads (center, same mass) to yield the EPS molded part - 3. Production-ready lightweight engineering with particle foams and Sandwich panels produced in a dynamic variothermal foam mold - 4. Half-timbered structure" in SEM : Compared to standard EPS prefoamed with steam, foam beads generated on the basis of radiation absorption have a finer cell structure at the same density, which leads to greater stiffness and better insulation properties - 5. Plastic model of a 3D-printed variothermal mold. The branched runner network of the surface tempering system is shown in blue. This enables the cavity surface to be heated or cooled down to the process temperature within seconds - 6. Natural decorative materials can be back-foamed just as readily without steam as high-strength sandwich structures made from PP-GF laminates (here : with a mille logo and EPP hybrid foam core) - 7. Tunnel oven for continuous radiation-induced pre-foaming of expandable microbeads in the pilot plant of Neue Materialien BayreuthEn ligne : https://drive.google.com/file/d/14GCrPXQtYroLv02WsYjCTTf8bOqisjdl/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28266
in KUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 3 (03/2017) . - p. 17-20[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18797 - Périodique Bibliothèque principale Documentaires Disponible Declaring war on quench marks / Christian Hopmann in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 11 (11/2018)
PermalinkDesign surfaces thanks to innovative mold coating / Jochen Klos in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 8 (2022)
PermalinkDesigning lighter cars / Katja Oswald in KUNSTSTOFFE INTERNATIONAL, Vol. 101, N° 11 (11/2011)
PermalinkPermalinkDeveloping an automotive crashbox for a mass market vehicle / Damien Guillon in JEC COMPOSITES MAGAZINE, N° 87 (03/2014)
PermalinkDevelopment of a composite tank for corrosive liquid transportation in JEC COMPOSITES MAGAZINE, N° 111 (03/2017)
PermalinkDevelopment of innovate CFRTP technologies for mass-produced cars / Jun Takahashi in JEC COMPOSITES MAGAZINE, N° 81 (05-06/2013)
PermalinkDevelopments using fibre-reinforced polymers (FRP) in construction / Mark Singleton in JEC COMPOSITES MAGAZINE, N° 85 (11-12/2013)
PermalinkDiamonds advance composites drilling / Fabian Rosenberger in JEC COMPOSITES MAGAZINE, N° 92 (10-11/2014)
PermalinkA different approach to natural fibre composites / Christian Fischer in JEC COMPOSITES MAGAZINE, N° 114 (07/2017)
PermalinkPermalinkDrones. Concentrés de technologies in INDUSTRIE & TECHNOLOGIES, N° 955 (05/2013)
PermalinkEasier said than done / Karl Durst in KUNSTSTOFFE INTERNATIONAL, Vol. 101, N° 3 (03/2011)
PermalinkEasier to reach the destination / Georg Grestenberger in KUNSTSTOFFE INTERNATIONAL, Vol. 110, N° 2 (02/2020)
PermalinkEco-friendly and cost-effective / Christoph Habermann in KUNSTSTOFFE INTERNATIONAL, Vol. 102, N° 12 (12/2012)
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