Profiled textile reinforcement for concrete applications / Paul Penzel in TECHNICAL TEXTILES, Vol. 67, N° 1 (2023)  

[article]  inTECHNICAL TEXTILES > Vol. 67, N° 1 (2023) . - p. 36-39 Titre : Profiled textile reinforcement for concrete applications Type de document : texte imprimé Auteurs : Paul Penzel, Auteur ; Lars Hahn, Auteur ; Anwar Abdkader, Auteur ; Chokri Cherif, Auteur Année de publication : 2024 Article en page(s) : p. 36-39 Note générale : Bibliogr. Langues : Multilingue (mul) Catégories : Construction -- Matériaux Fibres de carbone -- Propriétés mécaniques Matériaux cimentaires Renforts textiles Structure biaxiale Tricot chaîne Index. décimale : 677.4 Textiles artificiels Résumé : Building in a resource-saving way and still exploiting a high performance potential, is that even possible ? Composite optimized profiled textile reinforcements for concrete applications and the related manufacturing technology were developed at the ITM. On the basis of braiding and for-ming technology, a new generation of profiled reinforcement yarns was developed with the help of simulation-based investigations. Like ribbed steel reinforcements, these profiled yarns have a very high bond with the concrete matrix, but despite the profiling they almost fully exploit the performance potential of the carbon fibers in terms of tensile properties. In this way, the bond length required for complete force transmission between the textile reinforcement and the concrete can be reduced to just a few centimeters, and up to 80% of the component-dependent over-sizing of the textile reinforcement can be saved. The further development of the multiaxial warp knitting technology for the requirement-based and fiber-friendly processing of the profiled yarns into grid-like reinforcement structures enables the production of profiled textile reinforcement structures with the highest bond properties for use in carbon-reinforced concrete components with maximum material and resource efficiency. Note de contenu : - Innovative profiled reinforcement yarns - Performance potential of the new profiled reinforcement yarns - Development of the multiaxial warp knitting process - Table : Representation of unprofiled and profiled reinforcement yarns (3200 tex) - Fig. 1 : Tensile properties on the yarn and bond flow-slip relationship (in concrete) ofunprofiled and profiled reinforcement yarns - Fig. 2 : Stick placement system - Fig. 3 : Textile reinforcement structure made of profiled rovings and braiding yarns En ligne : https://drive.google.com/file/d/1ojWAvZrIIWQCEx5f0PKh9dwYrpKJMYPb/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40697 [article]

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Reduce costs and increase sustainability through the use of low-waste non-crimp fabrics / Konrad Zierold in TECHNICAL TEXTILES, Vol. 65, N° 5 (12/2022)  

[article]  inTECHNICAL TEXTILES > Vol. 65, N° 5 (12/2022) . - p. 274-276 Titre : Reduce costs and increase sustainability through the use of low-waste non-crimp fabrics Type de document : texte imprimé Auteurs : Konrad Zierold, Auteur ; Lars Hahn, Auteur ; Chokri Cherif, Auteur Année de publication : 2022 Article en page(s) : p. 274-276 Note générale : Bibliogr. Langues : Multilingue (mul) Catégories : Caractérisation Composites à fibres Coût -- Contrôle Déchets -- Réduction Durée de vie (Ingénierie) Structure biaxiale Textiles et tissus sans plis Tricot Index. décimale : 677 Textiles Résumé : Is it possible to produce complexly contoured composite components from multiaxial non-crimp fabrics without having to dispose of half of the expensive high-performance fiber material as waste ? A new technology for the production of low-cost biaxial fabrics with little waste was developed at the ITM on the basis of warp-knitting technology for lightweight applications suitable for large series production. For this purpose, an alternating weft yarn system was derived as the preferred variant from several solution approaches developed and successfully implemented on a multiaxial warp knitting machine by means of a retrofittable splicing module. This enables to process the high-performance weft yarns for textile semi-finished products close to the final contour, regardless of the machine width. The amount of waste in the weft direction can be reduced by up to 90%, depending on the fiber component. This makes the production of complexly contoured FRP components more material-efficient and sustainable. Note de contenu : - Starting situation and problem - Technical development and implementation - Material characterization and results - Fig. 1 : Concept illustration for the production of cost-reduced scrims based on alternating weft yarns - Fig. 2 : CAD sectional view of the splice module for inline production of an alternating weft thread - Fig. 3 : Implemented splice module - Fig. 4 : Low-waste, cost-reduced non-crimp fabric : semi-finished product contour after cutting - Fig. 5 : Technology demonstrator using the example of an FKV passenger fender En ligne : https://drive.google.com/file/d/1sa56uyyFVxqsV-N_0ROTKU_WMgJF6GTf/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38751 [article]

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