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Hard shell, lightweight core / Philipp Angst in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 1-2 (01-02/2019)
[article]
Titre : Hard shell, lightweight core : Rapid and cost effective sandwich parts with PU resin and PET core foam Type de document : texte imprimé Auteurs : Philipp Angst, Auteur ; Mike Wienand, Auteur Année de publication : 2019 Article en page(s) : p. 18-19 Langues : Anglais (eng) Catégories : Composites à fibres de carbone
Construction sandwich
Moulage par transfert de résine sous vide
Mousses plastiques
Polyéthylène téréphtalate
PolyuréthanesIndex. décimale : 668.4 Plastiques, vinyles Résumé : The combination of fiber-reinforced face layers with a lightweight foam core combines high strength and stiffness with low part weight. However, when processing, it is anything but easy to combine anisotropic FRP materials with lightweight,cost-effective foams. A tailored material system now makes processing by high-pressure resin transfer molding possible at low temperatures and pressures, with short cycle times. Note de contenu : - Good connection between the facing and core layers
- Evaluating the process window
- Figure : Good surface quality, pristine foam core : a cross-section through and HP-RTM part with carbon-fiber reinforcement of Airex T10.110 core and Henkel Loctite Max 2 PU resin
- Fig. 1 : Compressive strength of the foam cores Airex T10.110 and Airex TX.170 dependent on th emold temperature in the HP-RTM process
- Fig. 2 : Schematic curing behavior (DEA measurement) of Loctite Max 2 at 70°C mold temperature. The characteristically low viscosity at the start of the reaction is represented as a dotted line. Due to the freely selectable concentration of accelerator, a very curing of below 3 min can be achieved even at very low mold temperatures in the range from 60 to 70°CEn ligne : https://drive.google.com/file/d/1NdkmRVIq7AgLG-nt9WPWNhTbbXTNwpFJ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31810
in KUNSTSTOFFE INTERNATIONAL > Vol. 109, N° 1-2 (01-02/2019) . - p. 18-19[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20616 - Périodique Bibliothèque principale Documentaires Disponible Hybrid core concept® for sandwich structures / Philipp Angst in JEC COMPOSITES MAGAZINE, N° 43 (09/2008)
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Titre : Hybrid core concept® for sandwich structures Type de document : texte imprimé Auteurs : Philipp Angst, Auteur ; Roman Gätzi, Auteur Année de publication : 2008 Article en page(s) : p. 37-38 Langues : Anglais (eng) Tags : 'Matière plastique' Polyester 'Construction navale' Application 'Plastique alvéolaire' Polyuréhtane 'Polyéthylène téréphtalate' 'Chlorure polyvinyle' 'Matériau composite' 'Structure sandwich' Index. décimale : 668.4 Plastiques, vinyles Résumé : A structure typically consists of several different parts subjected to different loads and, depending on the application, must meet different characteristics. So why try to cover all needs with one single material, when combining different materials can significantly reduce the total cost and weight of such structures ? Note de contenu : - Intelligent combinations allow the best-performing structures
- The choice among a wide variety of productsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14029
in JEC COMPOSITES MAGAZINE > N° 43 (09/2008) . - p. 37-38[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 010655 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Material shift in wind energy Type de document : texte imprimé Auteurs : Philipp Angst, Auteur ; Roman Gaetzi, Auteur Année de publication : 2018 Article en page(s) : p. 46-47 Langues : Anglais (eng) Catégories : Chlorure de polyvinyle
Construction sandwich
Copolymère styrène-acrylonitrile
Eoliennes -- Conception et construction
Matières plastiques -- Propriétés mécaniques
Mousses plastiques
Pales d'éoliennes
Polyéthylène téréphtalateIndex. décimale : 668.4 Plastiques, vinyles Résumé : The dominant design of today's wind rotor blades consists of sandwich structures both in the blade shells and in their shear webs. The core materials in these sandwiches are rigid foam and structural balsa cores. While SAN- and PVC-based foams have been predominantly used as foam cores for blades in the past, today the more recent PET-based foam cores have taken over a leading role that continues to gather momentum. PVC and PU foams are widely used for nacelle covers, and PET foams are also increasingly chosen. Note de contenu : - PET foam core - the rising star
- Base polymer and raw material costs favour PET foam cores
- PET foams in nacelle production
- Total cost of ownership : Design optimization - Process optimization
- Fig. 1 : Fatigue resistance of different core materials. The Wöhler curve of PET is much flatter than the steep PVC curves. PET cores can sustain repeated load cycles much longer/at higher load
- Fig. 2 : Price evolution of polymer raw materials used for the most important foam cores : PU raw materials (MDI) experienced a steep increase while PET raw material prices remained quite stable
- Fig. 3 : Total cost of ownership considerations, factors adding to the material priceEn ligne : https://drive.google.com/file/d/1gFZpEnHtY8RfLbVVZYK_s0qvbKQAX3Ld/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31739
in JEC COMPOSITES MAGAZINE > N° 125 (11-12/2018) . - p. 46-47[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20358 - Périodique Bibliothèque principale Documentaires Disponible Rolling stock : weight reduction pays off / Philipp Angst in JEC COMPOSITES MAGAZINE, N° 69 (11-12/2011)
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Titre : Rolling stock : weight reduction pays off Type de document : texte imprimé Auteurs : Philipp Angst, Auteur Année de publication : 2011 Article en page(s) : p. 28-29 Langues : Anglais (eng) Catégories : Composites
Construction sandwich
Coût de production
Industrie ferroviaire
Matériaux -- AllègementIndex. décimale : 620.19 Autres matériaux Résumé : Composite sandwich constructions, with their very low weight and high insulation properties, can significantly improve the operating costs and environmental impact of railway systems. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17342
in JEC COMPOSITES MAGAZINE > N° 69 (11-12/2011) . - p. 28-29[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13512 - Périodique Bibliothèque principale Documentaires Disponible Sandwich design opens huge potential for lightweight engineering / Philipp Angst in JEC COMPOSITES MAGAZINE, N° 126 (01-02/2019)
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Titre : Sandwich design opens huge potential for lightweight engineering Type de document : texte imprimé Auteurs : Philipp Angst, Auteur ; Jürgen Emig, Auteur ; Mike Wienand, Auteur ; Pascal Albrecht, Auteur Année de publication : 2019 Article en page(s) : p. 21-24 Langues : Anglais (eng) Catégories : Composites à fibres
Construction sandwich
Coût -- Contrôle
Fibres à orientation unidirectionnelle
Fibres continues
Hautes pressions
Matériaux -- Allègement
Matières plastiques dans les automobiles
Moulage par transfert de résine sous videIndex. décimale : 668.4 Plastiques, vinyles Résumé : The trend toward electromobility only reinforced it : lightweight engineering has long been the focus of the automotive industry. Lightweight engineering has two positive effects on the sustainability of vehicles. A lighter vehicle consumes less energy for acceleration and frictional resistance. Moreover, fewer raw materials are needed for production which is another positive contribution toward sustainable mobility. Note de contenu : - Weight reduction with composite sandwich structures
- Weight and cost savings
- Established and cost-effective in large, global markets
- Example applications in series vehicles
- Sandwich manufacturing process
- The challenge of HP-RTM
- Short injection times allow the use of cost-effective rigid foams
- Process control based on the foam core's compressibility
- Optimum resin choice
- Successful test series
- Composite sandwiches are mature enough to significantly reduce a car's weight
- Fig. 1 : Different fibre reinforcements : oriented continuous fibres (tissue/scrim, UD) provide excellent mechanical properties (press process manufacturing
- Fig. 2 : Sandwich construction increases rigidity/stiffness at the same weight
- Fig. 3 : Increased core density over 0.1 kg/dm^3 hardly offers additional stiffness advantages
- Fig. 4 : With comparable stiffness and rigidity, the sandwich is much lighter, thus requiring fewer expensive raw materials. Thickness (height) is higher in the sandwich
- Fig. 5 : Pressure-time graph for a HP-RTM sandwich process showing the internal mould pressures, resin curing/viscosity at 100°C, and foam internal temperature
- Fig. 6 : Schematic curing behaviour of Loctite Max 2 at 70°C mold temperature
- Table 1 : Exemplary applications of sandwich designs in series production
- Table 2 : Overview and evaluation of FRP sandwich production processes
- Table 3 : Resin systems and processing parameters for manufacturing of HP-RTM sandwich partsEn ligne : https://drive.google.com/file/d/10LQ9B9nGj51l3R_TaLq9CebNIayHeoTd/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31782
in JEC COMPOSITES MAGAZINE > N° 126 (01-02/2019) . - p. 21-24[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20472 - Périodique Bibliothèque principale Documentaires Disponible