Biaxial-reinforced tubular fabrics with variable cross-sections / Quentin Bollengier in TECHNICAL TEXTILES, Vol. 65, N° 5 (12/2022)  

[article]  inTECHNICAL TEXTILES > Vol. 65, N° 5 (12/2022) . - p. 267-269 Titre : Biaxial-reinforced tubular fabrics with variable cross-sections Type de document : texte imprimé Auteurs : Quentin Bollengier, Auteur ; Sven Hellmann, Auteur ; Eric Häntzsche, Auteur ; Chokri Cherif, Auteur Année de publication : 2022 Article en page(s) : p. 267-269 Note générale : Bibliogr. Langues : Multilingue (mul) Catégories : Composites à fibres Matériaux -- Renforcement bi-axial Structures multicouches Tricot circulaire Tubes Index. décimale : 677.6 Tissus obtenus par des procédés spéciaux, quelle que soit leur composition : jacquard, feutres tissés et non tissés, tapisseries, tissus ajourés Résumé : Within the IGF research project 20493 BR a new technology for the integral manufacturing of biaxial-reinforced tubular fabrics with variable cross-sections was successfully developed, implemented and tested at the ITM. The tubular multi-layered weft-knitted fabrics feature continuous, uninterrupted reinforcement yarns in both the longitudinal and circumferential directions. Thus, a solid foundation for the efficient serial production of tubular pre-forms in integral design and eventually for the cost-effective production of highly load-bearing FRP tubes with complex geometry was successfully established. Note de contenu : - Objectives - Results : Technology development - Integral manufacturing of biaxial-reinforced tubular fabrics - Fig. 1 : Modified flat knitting machine Aries. 3 and biaxial-reinforced tubular fabrics implemented with it - Fig. 2 : Process sequences of the new stitch transfer on 1 needle bed - Fig. 3 : Implemented device for the warp yarn offset and detailed view of the displaceable yarn guides - Fig. 4 : Realized 3D tubular weft-knitted fabrics with variable diameters in the longitudinal direction En ligne : https://drive.google.com/file/d/1AFB2ftID9i5aTr53gFrRwp_ELbAgvFHu/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38748 [article]

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Innovative compression textiles based on novel shape memory yarns / Florian Wieczorek in TECHNICAL TEXTILES, Vol. 65, N° 4 (10/2022)  

[article]  inTECHNICAL TEXTILES > Vol. 65, N° 4 (10/2022) . - p. 196-198 Titre : Innovative compression textiles based on novel shape memory yarns Type de document : texte imprimé Auteurs : Florian Wieczorek, Auteur ; Robert Tonndorf, Auteur ; Carmen Sachse, Auteur ; Eric Häntzsche, Auteur ; Dilbar Aibibu, Auteur ; Chokri Cherif, Auteur Année de publication : 2022 Article en page(s) : p. 196-198 Note générale : Bibliogr. Langues : Multilingue (mul) Catégories : Effet mémoire de forme Fibres textiles synthétiques Produits de contention Textiles et tissus à usages médicaux Textiles et tissus à usages techniques Vêtements de compression Index. décimale : 677.4 Textiles artificiels Résumé : Within the framework of the IGF project, the ITM has succeeded in developing and implementing innovative compression textiles made of a new type of yarn with shape memory effect (SMY), which can be put on with significantly less effort compared to commercial products. The special feature is that the integrated SMY causes the compression textile to contract only when heat is applied after donning, thus gradually building up the compression effect. This makes e.g. stockings significantly easier to put on, which will increase the acceptance of compression therapy. For the prompt transfer of the research results into industrial practice and thus into commercial products, the manufacturing technologies already established in the German textile industry were addressed. Therefore, suit-able SMY were implemented by means of melt spinning technology and the compression textiles by flat knitting technology, for which the necessary technological and product preparation know-how was provided especially for small and medium-sized enterprises (SMEs). Note de contenu : - Development shape memory yarns - Development compression textile En ligne : https://drive.google.com/file/d/1RTjZYyljv3BaHApDdrqftU7kaz-FoTcq/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38547 [article]

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Repairing instead of replacing / David Rabe in KUNSTSTOFFE INTERNATIONAL, Vol. 111, N° 6 (2021)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 111, N° 6 (2021) . - p. 34-36 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 Anh 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 Tricot Index. 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 values En ligne : https://drive.google.com/file/d/1BHkov2psRWJmmN5IaLr9k_L_tpLUbZcq/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36176 [article]

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