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Titre : Repairing instead of replacing : Process for repairing CFRP components without machining Type de document : texte imprimé Auteurs : David Rabe, Auteur ; Philippa Böhnke, Auteur ; Thi An My Huynh, Auteur ; Iris Kruppke, Auteur ; Thomas Gereke, Auteur ; Eric Häntzsche, Auteur ; Chokri Cherif, Auteur Année de publication : 2021 Article en page(s) : p. 34-36 Langues : Anglais (eng) Catégories : Composites -- Réparation
Composites à fibres de carbone
Coût -- Contrôle
Fibres à orientation unidirectionnelle
Patchs de réparation
Rayonnement ultraviolet
Structures multicouches
TricotIndex. décimale : 668.4 Plastiques, vinyles Résumé : CFRP components are often in continuous use under harsh environmental conditions, for example in aircraft and motor vehicles. If any damage occurs, the CFRP structures are simply replaced by new components in most cases. This is mainly due to the high cost of established repair methods. With a newly developed process, defective CFRP structures can now be repaired locally much more easily. Note de contenu : - Three process steps to the repaired CFRP component
- Simulation as a basis
- UV light instead of manual ablation
- Tests with UD, TFP and MLG patches
- Costs reduced by 80 percent
- Fig. 1 : Overview of the simulation-based repair method for CFRP components: the method enables targeted repair of the damaged area
- Fig. 2 : In the process, the damaged area of the test specimen (1) is treated with a UV LED lamp (see Fig. 3). The fibers are then separated (3) in the repair area (2) thus exposed. The prepared repair area (4) is then cleaned, activated and prepared by an adhesion promoter for the insertion of the patch
- Fig. 3 : Matrix removal in the repair area is carried out with the help of an UV LED lamp. Compared to conventional processes, the manual effort is highly reduced, which ensures higher reproducibility
- Fig. 4 : For the repair, for example, a TFP patch is inserted into the prepared site (A – first patch part inserted, B – second patch part inserted). For the subsequent reinfiltration (C), a method based on the VARI process is used
- Fig. 5 : Rupture force (F max) and elongation at F max for the different patch variants : The UD and MLG patches achieve the best valuesEn ligne : https://drive.google.com/file/d/1BHkov2psRWJmmN5IaLr9k_L_tpLUbZcq/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36176
in KUNSTSTOFFE INTERNATIONAL > Vol. 111, N° 6 (2021) . - p. 34-36[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22867 - Périodique Bibliothèque principale Documentaires Disponible Simulation-based development of woven fabrics for 3D FRP applications / Martin Kern in TECHNICAL TEXTILES, Vol. 65, N° 4 (10/2022)
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Titre : Simulation-based development of woven fabrics for 3D FRP applications Type de document : texte imprimé Auteurs : Martin Kern, Auteur ; Thi An My Huynh, Auteur ; Gerald Hoffmann, Auteur ; Thomas Gereke, Auteur ; Chokri Cherif, Auteur Année de publication : 2022 Article en page(s) : p. 226-228 Langues : Multilingue (mul) Catégories : Composites à fibres
Modèles numériques
Simulation par ordinateur
Structures tridimensionnelles
Textiles et tissus à usages techniques
Tissage
TissésIndex. décimale : 677 Textiles Résumé : When manufacturing 3D component geometries from fiber-plastic composites, undesirable distortions occur during the forming of the textile structure, which lead, for example, to wrinkle formation or fiber mis-orientation. This can be counteracted by developing tailor-made fabrics that exhibit the required local forming capacity in individual sub-areas. For the design and implementation of these tailored weaves, a CAE process chain was validated and a novel ORW system was developed in terms of design technology. Note de contenu : - Modelling
- Textile technical realization of tailored weaves
- Fig. 1 : FEM drape model
- Fig. 2 : Comparison of the distortion behavior of plain woven fabric and tailored weave with different weave sub-areas and ORS yarns in a) experiment and b) model, c) simulated shear angle distribution
- Fig. 3 : a) Weave plan and b) drafting pattern for the manufacturing the spring dome
- Fig. 4 : Formed and consolidated spring dome geometry : a) experiment, b) drape simulationEn ligne : https://drive.google.com/file/d/1F_eLhpV22HKQUwMF7z_svHIb-zh0NHKq/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38559
in TECHNICAL TEXTILES > Vol. 65, N° 4 (10/2022) . - p. 226-228[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23778 - Périodique Bibliothèque principale Documentaires Disponible