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Approach to optimizing a combined out-of-autoclave (OOA) prepreg/liquid composite molding (LCM) process for integrated structures / Claudio di Fratta in SAMPE JOURNAL, Vol. 48, N° 5 (09-10/2012)
[article]
Titre : Approach to optimizing a combined out-of-autoclave (OOA) prepreg/liquid composite molding (LCM) process for integrated structures Type de document : texte imprimé Auteurs : Claudio di Fratta, Auteur ; Mario Danzi, Auteur ; Veit Gabathuler, Auteur ; Markus Zogg, Auteur ; Paulo Ermanni, Auteur Année de publication : 2012 Article en page(s) : p. 40-46 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Composites thermoplastiques -- Moulage par infusion
Composites thermoplastiques -- Moulage par injection
Hors autoclave (technologie)
Matériaux -- Imprégnation
Moulage par transfert de résine sous vide
Séchage
StratifiésIndex. décimale : 620.1 Mécanique de l'ingénieur (mécanique appliquée) et matériaux Résumé : Hybrid processes combining characteristics of prepreg and resin infusion/injection techniques are interesting and advantageous solutions for manufacturing of highly integrated structures. The possibility, given by traditional prepreg technology, to manufacture with a good reproducibility parts having elevated mechanical performances and as well to introduce additives like flame retardants or tougheners, can be successfully combined with liquid composite molding (LCM) characteristics. This work aimed to investigate these combined processes. The present research involved furthermore out-of-autoclave (OOA) prepreg, which provide additional cost-savings and environmental advantages compared with standard autoclave techniques: OOA prepreg plies and dry fabrics are laid up together in a mold and then resin is injected (RTM-like) or infused (VARI-like) in the cavity. When the impregnation is completed the part can be cured in oven. Goal of the investigation is to analyze the performances of hybrid laminates, in respect to pure OOA prepreg- and LCM-parts and to optimize the manufacturing route, assessing the process robustness through several tests. Simple demonstrators have been also realized to prove the hybrid technique feasibility and effectiveness. Note de contenu : - MATERIALS AND PROCESS DESCRIPTION : Materials and process description - Hybrid OOA prepreg/LCM process description
- TESTS RESULTS AND DISCUSSION : Feasibility analysis and comparison with pure procesing - Sensitivity studyPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16079
in SAMPE JOURNAL > Vol. 48, N° 5 (09-10/2012) . - p. 40-46[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14093 - Périodique Bibliothèque principale Documentaires Disponible RTM process monitoring by pressure sensors / Claudio di Fratta in JEC COMPOSITES MAGAZINE, N° 91 (08-09/2014)
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Titre : RTM process monitoring by pressure sensors Type de document : texte imprimé Auteurs : Claudio di Fratta, Auteur ; Florian Klunker, Auteur ; Paolo Ermanni, Auteur Année de publication : 2014 Article en page(s) : p. 50-51 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Capteurs (technologie)
Composites à fibres
Ecoulement visqueux
Fluides, Mécanique des
Matériaux -- Imprégnation
Moulage par transfert de résine sous vide
Perméabilité
Polymères
Pression
Qualité -- Contrôle
Rhéologie
Textiles et tissus à usages techniquesIndex. décimale : 668.4 Plastiques, vinyles Résumé : The Laboratory of Composite Materials Adaptive Structures at ETH Zürich (Switzerland) investigates innovative monitoring approaches for the RTM process. The research focuses on the development of techniques relying on a discrete number of pressure sensors to track resin flow and estimate final part properties for quality assessment during production. Note de contenu : - Flow-front monitoring
- Permeability profile reconstruction
- Online quality assessment and flow rate feedback controlPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23019
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Code-barres Cote Support Localisation Section Disponibilité 16509 - Périodique Bibliothèque principale Documentaires Disponible Structural adhesives with customized fast curing / Claudio di Fratta in ADHESION - ADHESIVES + SEALANTS, Vol. 17, N° 3/2020 (2020)
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Titre : Structural adhesives with customized fast curing Type de document : texte imprimé Auteurs : Claudio di Fratta, Auteur ; Marko Zivaljic, Auteur ; Antonio Corsaro, Auteur ; David Hofstetter, Auteur ; Michael Schlumpf, Auteur ; Bernhard Bosshard, Auteur ; Fabien Choffat, Auteur Année de publication : 2020 Article en page(s) : p. 18-23 Note générale : Bibliogr. Langues : Multilingue (mul) Catégories : Adhésifs dans les automobiles
Adhésifs structuraux
Assemblages collés
Essais de résilience
Essais dynamiques
Matériaux -- AllègementIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : Commercial transportation industry is constantly challenged by increasing production efficiency and reducing costs,while introducing new design solutions based on lightweight materials. Two innovative adhesive technologies, 'Powerflex' and 'Curing by Design', have been developed to maximize the potential offered by modern lightweight design as well as to improve productivity by immediate curing at precisely defined time. Note de contenu : - Features of the 'Powerflex' technology
- Combination with 'Curing by Design' technology
- Benefits for manufacturers
- Fig. 1 : Comparison of DMA between "Powerflex" technology and standard structural adhesive in commercial transportation
- Fig. 2 : Cohesive failures of 'Powerflex' adhesive on e-coated steel in 'Thick Adherent Shear Test' (TAST) and but joint tensile tests at 23°C and -40°C
- Fig. 3 : Impact tests of T-joints bonded with a standard toughened adhesive and a 'Powerflex' adhesive : the larger area beneath the blue curves indicate a greater toughness and energy absorption
- Fig. 4 : Comparison of curing behavior between 'Curing by Design' technology and a standard structural adhesive with same working time
- Fig. 5 : Curing by Design' working mechanism (schematically)
- Fig. 6 : Application of 'Powerflex' and 'Curing by Design' adhesive for hook arm bonding on a truck chassis
- Fig. 7 : Application of 'Powerflex' and Curing by design' adhesive for bus roof bonding
- Fig. 8 : Extended design concepts and modular bonding of lightweight bus roofEn ligne : https://drive.google.com/file/d/1QSaAxe4XI7dCa_JJVChkAMojQzhOchfC/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34644
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Code-barres Cote Support Localisation Section Disponibilité 22256 - Périodique Bibliothèque principale Documentaires Disponible