Dissertations / Theses on the topic 'Hybrid yarns'
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Zhou, Fenglei. "Flat Spinneret Electrospinning and Nanocoating for Hybrid Yarns." Thesis, University of Manchester, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.508557.
Full textKravaev, Plamen, Steffen Janetzko, Thomas Gries, Bong-Gu Kang, Wolfgang Brameshuber, Maike Zell, and Josef Hegger. "Commingling Yarns for Reinforcement of Concrete." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1244040840310-74290.
Full textHasan, M. M. B., E. Staiger, M. Ashir, and C. Cherif. "Development of carbon fibre/polyamide 6,6 commingled hybrid yarn for textile-reinforced thermoplastic composites." Sage, 2015. https://tud.qucosa.de/id/qucosa%3A35638.
Full textSelver, Erdem. "Tow level hybridisation for damage tolerant composites." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/tow-level-hybridisation-for-damage-tolerant-composites(8cf53f8c-165f-4e8b-b67f-f8fd34c327e2).html.
Full textHasan, M. M. B., M. Offermann, M. Haupt, A. Nocke, and Ch Cherif. "Carbon filament yarn-based hybrid yarn for the heating of textile-reinforced concrete." Sage, 2014. https://tud.qucosa.de/id/qucosa%3A35610.
Full textHengstermann, M., N. Raithel, A. Abdkader, M. M. B. Hasan, and Ch Cherif. "Development of new hybrid yarn construction from recycled carbon fibers for high performance composites: Part-I: basic processing of hybrid carbon fiber/polyamide 6 yarn spinning from virgin carbon fiber staple fibers." Sage, 2016. https://tud.qucosa.de/id/qucosa%3A35421.
Full textHengstermann, M., M. M. B. Hasan, A. Abdkader, and Ch Cherif. "Development of new hybrid yarn construction from recycled carbon fibers (rCF) for high performance composites: Part-II: Influence of yarn parameters on tensile properties of composites." Sage, 2017. https://tud.qucosa.de/id/qucosa%3A35532.
Full textSeghini, Maria Carolina. "Mechanical Analysis and Fibre/Matrix Interface Optimization for Next Generation of Basalt-Plant Fibre Hybrid Composites." Electronic Thesis or Diss., Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique, 2020. http://www.theses.fr/2020ESMA0003.
Full textGlobal awareness of environmental issues has resulted in the emergence of “green” composites, in which natural fibres are used to replace synthetic ones. However, in semi-or structural applications, it can be inconvenient to use composites based on natural fibres. A possible solution to this problem is the development of hybrid composite materials, combining together plies of natural and synthetic fibres. In this framework, the aim of this research project was to develop basalt-flax fibre hybrid composites with a view to obtaining more environmentally friendly composites for semi-structural applications. Hybrid composites were produced through vacuum infusion molding with epoxy matrix.For comparison purposes, 100% flax fibre composites and 100% basalt fibre composites were also manufactured. A quasi-static and dynamic mechanical characterization showed that the hybridization allows the production of a composite with intermediate mechanical performances compared to those possessed by flax and basalt composites. However, the damage analysis has revealed the need to optimize the fibre/matrix interface adhesion quality, in order to increase the mechanical properties of the resulting hybrid composites. For this reason, different surface modification treatments have been specifically designed and investigated for flax and basalt fibres. Flax and basalt fibres were treated by the physical process of Plasma Enhanced Chemical Vapor Deposition. Flax fibres were also subjected to two chemical treatments using enzymatic species and supercritical CO2. The effects of the surface modification treatments on the thermal stability, morphology and mechanical properties of flax and basalt fibres have been investigated. The degree and extent of fibre/matrix adhesion were analyzed by micromechanical fragmentation tests on monofilament composites. The adhesion quality between fibres and both epoxy and vinylester matrices has been assessed in terms of critical fragment length, debonding length and interfacial shear strength. High-resolution μ-CT has been used to support the analysis of the damage mechanisms during fragmentation tests. For both flax and basalt fibres, the best results were obtained after the plasma polymer deposition process. This process was able to produce a homogeneous tetravinylsilane coating on the surface of basalt and flax fibres, which resulted in a significant increase in the fibre/matrix adhesion, thus paving the way for the next generation of more environmentally friendly hybrid composites for semi-structural applications
Torun, Ahmet Refah. "Advanced manufacturing technology for 3D profiled woven preforms." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-71966.
Full textGong, Ting. "Tensile behavior of high-performance cement-based composites with hybrid reinforcement subjected to quasi-static and impact loading." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A73914.
Full textStrain-hardening cement-based composites (SHCC) and textile-reinforced concrete (TRC) are two novel types of fiber-reinforced cementitious composites that exhibit ductile, strain-hardening tensile behavior. SHCC comprises fine-grained cementitious matrices and short, high-performance polymer fiber, while TRC is a combination of a fine-grained, cementitious matrix and continuous two- or three- dimensional textile layers of multi-filament yarns, usually made of carbon or alkali-resistant glass. Both composites yield high inelastic deformations in a strain-hardening phase due to the successive formation of multiple fine cracks. Such cracking behavior stands for high energy absorption of the composites when exposed to extreme loading, without abrupt loss of load-bearing capacity. In comparative terms, SHCC shows superior strain capacity, while TRC yields considerably higher tensile strength. The addition of short fibers strengthens the matrix by efficiently restraining the micro-cracks’ growth and reducing spallation, while the textile reinforcement ensures a secure confinement of the reinforced concrete element (substrate to be strengthened), as well as a favorable stress distribution. The combination of SHCC and textile reinforcement is expected to deliver high tensile strength and stiffness in the strain-hardening stage along with pronounced multiple cracking. In order to achieve a favorable synergetic effect, a purposeful material design is required based on a clear understanding of the mechanical interactions in the composites. In the framework of the DFG Research Training Group GRK 2250, which aims at enhancing structural impact safety through thin strengthening layers made of high-performance mineral-based composites, this work focuses on developing hybrid fiber-reinforced cementitious materials to be applied on the impact rear side. The development concept builds upon a systematic investigation of various aspects of the mechanical behaviors of SHCC and textile at quasi-static and impact strain rates, including the bond properties of fiber to matrix and textile to matrix. Accordingly, uniaxial quasi-static tension tests were first performed on SHCC, bare textile, and hybrid-reinforced composite specimens. The parameters under investigation were types of short fiber and textile reinforcements, reinforcing the ratio for textile as well as bond properties between textile and the surrounding SHCC. Furthermore, impact tension tests were performed to study the strain rate effect on the synergetic composite response. Finally, single-yarn pull-out tests were carried out under both quasi-static and impact loading rates to supplement the comparative assessment of the hybrid fiber-reinforced composites. These tests yielded shear strength-related parameters for quantifying the bond properties of different materials, which were then used as input of the analytical model developed to describe the mechanics of crack propagation and tension stiffening effect of textile-reinforced composites without short fibers. This model is the first step towards a comprehensive analytical description of the tensile behavior of hybrid fiber-reinforced composites based on the experimental data and input parameters attained through the work at hand.
Maron, Bernhard. "Beitrag zur Modellierung und Simulation des Thermoformprozesses von textilverstärkten Thermoplastverbunden." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-207535.
Full textWu, Chien-Te, and 吳建德. "Processing Technique of PP/High Tenacity PET Hybrid Core Yarn Manufactured Geogrids." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/7tgbm9.
Full text逢甲大學
紡織工程所
91
The woven type geogrids are manufactured more nowadays in Taiwan and it is short of research data and requires investigating deeply. We designed and produced a geogrids processer in this thesis. We spun the hybrid core yarn with the Twist-Warp Machine and weaved geogrids with the hybrid core yarn. The improvement and fabrication with geogrids processer was center on shedding mechanism, picking mechanism, beating mechanism, let-off mechanism, and tack-up mechanism. The results showed that the geogrids processer could manufacture geogrids successfully. The geogrids request high strength and low elongation. In this thesis, we spun hybrid core yarn with two bundles of high tenacity PET (2000 D/384 f, core) and one bundle of PP (1000 D/120 f, sheath) with the Twist-Warp Machine. The results showed that we could spin PP/high tenacity PET hybrid core yarn with twist factor down to 8.3. The strength is 323.7 N and the elongation is 13.2 % with the PP/high tenacity PET hybrid core yarn. Weaved the geogrids with the PP/ high tenacity PET hybrid core yarn that provided with high strength, low elongation and lightweight. In this thesis, the manufacture conditions, mechanical properties, acid-resisting property, base-resisting property and light and water exposure-resisting property on geogrids weaved with PP/high tenacity PET hybrid core yarn was investigated. The results showed that we could obtain the best mechanical properties with geogrids when the heating temperature was 190 ℃, heating time was 4 minutes. The longitudinal strength was 46.4 kN/m, the transverse strength was 23.6 kN/m, the junction strength was 6.2 kN/m, and the longitudinal elongation was 11.4 % of the geogrids. The strength of the geogrids didn’t reduce with the acid-resisting and base-resisting tests. The strength reduced clearly with the light and water exposure-resisting (600 hours) test.
Hengstermann, Martin. "Entwicklung von Hybridgarnen aus recycelten Carbonfasern und Polyamid 6-Fasern für thermoplastische Verbundbauteile mit hohem Leistungsvermögen." 2019. https://tud.qucosa.de/id/qucosa%3A73810.
Full textReese, Julian. "Entwicklung eines resistiven Verfahrens zur Imprägnierung und Konsolidierung von auf Kohlenstofffasern basierenden thermoplastischen Hybridgarntextilien." 2020. https://tud.qucosa.de/id/qucosa%3A75237.
Full textMaron, Bernhard. "Beitrag zur Modellierung und Simulation des Thermoformprozesses von textilverstärkten Thermoplastverbunden." Doctoral thesis, 2015. https://tud.qucosa.de/id/qucosa%3A29680.
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