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Dissertations / Theses on the topic 'Yarn tension'

Author: Grafiati

Published: 4 June 2021

Last updated: 27 July 2025

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1

Atalay, Ozgur. "Development and investigation of weft knitted strain sensor." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/development-and-investigation-of-weft-knitted-strain-sensor(54fffacb-d1d7-4e9e-9d8f-7f33d4b90d66).html.

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This thesis presents a study of the sensing properties exhibited by textile-based knitted strain sensors. Sensing fabrics were manufactured from silver-plated conductive nylon and non-conducting elastomeric yarns. The component yarns offered similar diameters, bending characteristics and surface friction, but their production parameters differed in respect of the yarn input tension, the number of conductive courses in the sensing structure and the elastomeric yarn extension characteristics. The knitted sensors were manufactured using flat-bed knitting technology, and electro-mechanical tests w

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2

Shankam, Narayana Vivek Prasad. "A Novel Method for Dynamic Yarn Tension Measurement and Control in Direct Cabling Process." NCSU, 2005. http://www.lib.ncsu.edu/theses/available/etd-12142005-110719/unrestricted/etd.pdf.

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3

Babaarslan, Osman. "Compensation of yarn tension variations during high speed cone winding of a constant delivery system." Thesis, University of Leeds, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.517751.

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4

Wright, Ian C. "The design of a yarn tension control system for the high speed formation of conical packages." Thesis, Loughborough University, 1990. https://dspace.lboro.ac.uk/2134/13630.

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The research described was primarily concerned with working towards the solution of the problem of yarn tension control when building conical packages on an open-end spinning machine at yarn delivery speeds of 500 m1min"cause of the total lack of published work on the mathematical modelling of the parameters affecting tension variation, a considerable amount of effort was spent in the establishment of this basic understanding. This mathematical analysis appears, in the main, in the appendices to this thesis. In addition to the analysis of yarn tension variations depending on machine geometry p

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5

Almoughni, Hend Mohammed Aa. "Capillary flow of liquid water through plain knitted fabrics." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/capillary-flow-of-liquid-water-through-plain-knitted-fabrics(4cd71022-212f-4536-8a5f-532fcd0883d0).html.

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In extreme weather conditions and activity levels of human subjects evaporation of sweat is critical for maintaining the sensorial and thermal comfort. Fabrics, from which clothes worn next to the skin are made, play an important role in facilitating the transfer of body liquid perspiration away from the skin to the environment through the mechanisms of capillary flow and evaporation. This work is a theoretical and experimental investigation of water flow characteristics of plain knitted fabrics with relevance to their structure geometry and constituent fibre chemistry. Plain knitted fabrics w

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6

Chevalier, Caroline. "Caractérisation du comportement mécanique longitudinale d'un fil de para-aramide en sollicitation dynamique." Thesis, Valenciennes, 2016. http://www.theses.fr/2016VALE0030/document.

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Ce travail a pour objectif d’étudier le comportement mécanique d’un fil de para-aramide en sollicitation longitudinale et dynamique. Pour ce faire, nous avons conçu un nouveau dispositif expérimental permettant de réaliser ces essais à l’aide d’un canon à gaz : le Dispositif de Traction par Impact sur Fil (DTIF). Ce dispositif a subi de nombreuses modifications dans le but d’obtenir des conditions d’essais optimales. Celui-ci est associé à un dispositif de mesure par laser permettant d’obtenir le profil de vitesse du projectile ainsi que les courbes caractéristiques de Force-Déformation du fil

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7

Hossain, Mahmud, Christian Telke, Anwar Abdkader, Chokri Cherif, and Michael Beitelschmidt. "Mathematical modeling of the dynamic yarn path depending on spindle speed in a ring spinning process." Sage, 2016. https://tud.qucosa.de/id/qucosa%3A35418.

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This paper presents a mathematical model to predict the distribution of yarn tension and the balloon shape as a function of spindle speed in the ring spinning process. The dynamic yarn path from the delivery rollers to the winding point on the cop has been described with a non-linear differential equation system. These equations have been integrated with a Runge–Kutta method using MATLAB software. Since the numerical solution of the equations strongly depends on initial values, an algorithm of sensitivity analysis has been developed to predict the right choice of initial values in order to fin

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8

Hossain, M., C. Telke, M. Sparing, et al. "Mathematical modeling, simulation and validation of the dynamic yarn path in a superconducting magnet bearing (SMB) ring spinning system." Sage, 2017. https://tud.qucosa.de/id/qucosa%3A35492.

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The new concept of a superconducting magnetic bearing (SMB) system can be implemented as a twisting element instead of the existing one in a ring spinning machine, thus overcoming one of its main frictional limitations. In the SMB, a permanent magnet (PM) ring rotates freely above the superconducting ring due to the levitation forces. The revolution of the PM ring imparts twists similarly to the traveler in the existing twisting system. In this paper, the forces acting on the dynamic yarn path resulting from this new technology are investigated and described with a mathematical model. The equa

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9

Gong, 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.

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Hochduktile Betone (Engl.: Strain-Hardening Cement-based Composites – SHCC) und Textilbetone (engl.: Textile Reinforced Concrete – TRC) sind zwei neuartige Faserbetone, die ein duktiles und dehnungsverfestigendes Zugverhalten aufweisen. SHCC bestehen aus feinkörnigen Zementmatrizen und kurzen Hochleistungspolymerfasern, während TRC eine Kombination aus feinkörnigen Zementmatrizen und kontinuierlichen zwei- oder dreidimensionalen Textilschichten darstellt. Letztere bestehen aus Multifilamentgarnen aus Kohlenstoff, alkalibeständigem Glas oder Polymerfasern. Die hohe elastische Verformbarkeit bei

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10

Hartig, Jens. "Numerical investigations on the uniaxial tensile behaviour of Textile Reinforced Concrete." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-66614.

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In the present work, the load-bearing behaviour of Textile Reinforced Concrete (TRC), which is a composite of a fine-grained concrete matrix and a reinforcement of high-performance fibres processed to textiles, exposed to uniaxial tensile loading was investigated based on numerical simulations. The investigations are focussed on reinforcement of multi-filament yarns of alkali-resistant glass. When embedded in concrete, these yarns are not entirely penetrated with cementitious matrix, which leads associated with the heterogeneity of the concrete and the yarns to a complex load-bearing and failu

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11

Shao, Xin. "Theoretical modeling of the tensile behavior of staple yarn." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/8273.

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12

BERTOCCHI, Giorgio. "Modellazione e criteri di sintesi di alimentatori di filato." Doctoral thesis, Università degli studi di Bergamo, 2011. http://hdl.handle.net/10446/873.

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13

Katı, Ela Selver Ramazan. "Yarı iletken malzemeler için termokapiller konveksiyon üzerine deneysel bir çalışma /." Isparta : SDÜ Fen Bilimleri Enstitüsü, 2009. http://tez.sdu.edu.tr/Tezler/TF01318.pdf.

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14

Rypl, Rostislav, Miroslav Vořechovský, Britta Sköck-Hartmann, Rostislav Chudoba, and Thomas Gries. "Effect of twist, fineness, loading rate and length on tensile behavior of multifilament yarn." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1244041881719-95100.

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The idea underlying the present study was to apply twisting in order to introduce different levels of transverse pressure. The modified structure affected both the bonding level and the evolution of the damage in the yarn. In order to isolate this effect in a broader context, additional parameters were included in the experiment design, namely effects of loading rate, specimen length and filament diameter (directly linked to the fineness of the yarn). These factors have been studied in various contexts by several authors. Some related studies on involved factors will be briefly reviewed.

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15

Chowdhury, Md Moazzem Hossain. "The tensile behaviour prediction of yarns using artificial neural networks." Thesis, University of Leeds, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.440476.

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16

Hengstermann, 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.

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This article reports the successful manufacturing of hybrid yarns from virgin staple CF (40 or 60 mm) or recycled staple CF (rCF) by mixing with polyamide 6 (PA 6) fibers of defined length. The hybrid yarns are produced using an optimized process route of carding, drawing, and flyer machine. Furthermore, the influence of CF length, CF type (i.e. virgin or rCF), CF volume content, and twist of the yarn are also investigated regarding the tensile properties of unidirectionally laid (UD) thermoplastic composites. The results show that CF length, yarn twist, and CF content of composites play a big

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17

Hosseini, Ehsan. "Mechanical Properties of Outer Protection Layer on Submarine High Voltage Cables." Thesis, Blekinge Tekniska Högskola, Institutionen för maskinteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-859.

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In this thesis, the Mechanical properties of polypropylene yarn of outer protection layer on Submarine High Voltage Cable, twisted around submarine cable,is determined on various conditions at ABB Company. In the first step, tensile tests are done with polypropylene yarn specimens with and without Bitumen at Room temperature. In the second step,tensile tests are done with polypropylene yarn specimens with and without Bitumen and with knotted polypropylene yarn namely: the Fishermen’s knot, the Weaver’s knot, the Square knot and the Overhand knot at Warm Condition (60˚c) and Cold Condition(-5˚c

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18

Parlapalli, Rohit. "Effect of twist on load transfer and tensile strength in carbon nanotube bundles." University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1382372894.

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19

Chudoba, Rostislav, Martin Konrad, Markus Schleser, Konstantin Meskouris, and Uwe Reisgen. "Parametric study of tensile response of TRC specimens reinforced with epoxy-penetrated multi-filament yarns." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1244043793029-57511.

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The paper presents a meso-scopic modeling framework for the simulation of three-phase composite consisting of a brittle cementitious matrix and reinforcing AR-glass yarns impregnated with epoxy resin. The construction of the model is closely related to the experimental program covering both the meso-scale test (yarn tensile test and double sided pull-out test) and the macro-scale test in the form of tensile test on the textile reinforced concrete specimen. The predictions obtained using the model are validated using a-posteriori performed experiments.

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20

Homoro, Omayma. "Influence de la pré-imprégnation sur le comportement mécanique des composites verre-matrice ettringitique : étude expérimentale et numérique." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSE1239/document.

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Ces dernières années, les matériaux composites à matrices minérales ont suscité un grand intérêt dans le domaine du génie civil, en raison de leurs multiples avantages tels que la grande résistance en traction, le comportement pseudo-ductile, la facilité de mise en oeuvre, la nontoxicité et la compatibilité aux substrats. Toutefois, l’efficacité de ces composites est souvent limitée du fait de la faible adhérence du renfort avec la matrice. Cela est du à la faible pénétration des particules de la matrice entre les filaments internes du fil, ce qui entraine une rupture prématurée du matériau. C

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21

Assis, Regina Guidon de. "Um estudo sobre arquitetura têxtil no Brasil: o segmento de mercado das estruturas tensionadas feitas com membranas poliéster/PVC." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/100/100133/tde-09012013-104014/.

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Um tipo de composto têxtil, comumente chamado de membrana têxtil, tem sido empregado, nas últimas décadas, como parte de um sistema arquitetônico usado para a cobertura, fechamento e/ou proteção de espaços públicos e privados em vários países do mundo. O termo membrana está relacionado com o fato de o material permanecer tensionado e separar dois ambientes que se interagem. Essa solução arquitetônica é comumente conhecida como arquitetura têxtil, especialmente quando se trata de estruturas tensionadas; o termo é usado por muitos profissionais em todo mundo, apesar de não existir uma unanimidad

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22

CHOU, CHIN-JUN, and 周經潤. "The Effect of Yarn Feeding Angle and Tension on the Plated Yarn Coverage Using V-bed Flat Knitting Machine." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/85771262292906047038.

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碩士<br>輔仁大學<br>織品服裝學系碩士班<br>105<br>The study is to explore the effect of yarn feeding angle and tension on the plated coverage (mis-plated) which using the same yarn count (both ground yarn and fact yarn) in the V-bed flat knitting machine. On the other hand, we use the DigiEye imaging system to evaluate the plated coverage (mis-plating). The result is that when the feeding angle of ground yarn is greater than face yarn and the feeding tension of ground yarn is also greater than face yarn, we could efficiency to solve the mis-plated issue. The conclusion is properly control the feeding tension

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23

Wu, Szu-Yao, and 吳思瑤. "Application of Statistical Features in Yarn Tension Pattern Recognition using Support Vector Machine and Artificial Neural Network." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/57472757705056055302.

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碩士<br>元智大學<br>工業工程與管理學系<br>96<br>Control chart pattern recognition is an important work in statistical process control. A control chart may present several unnatural patterns which including trends, sudden shifts, mixtures, and cyclic patterns. The occurrence of unnatural patterns implies that the process is affected by assignable causes, and corrective actions should be taken. Actually, the types of unnatural patterns which exist in real process are comprehensive. Identification correctly of unnatural patterns can greatly narrow the set of possible causes that must be investigated, and thus t

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24

Hartig, Jens. "Numerical investigations on the uniaxial tensile behaviour of Textile Reinforced Concrete." Doctoral thesis, 2010. https://tud.qucosa.de/id/qucosa%3A25532.

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In the present work, the load-bearing behaviour of Textile Reinforced Concrete (TRC), which is a composite of a fine-grained concrete matrix and a reinforcement of high-performance fibres processed to textiles, exposed to uniaxial tensile loading was investigated based on numerical simulations. The investigations are focussed on reinforcement of multi-filament yarns of alkali-resistant glass. When embedded in concrete, these yarns are not entirely penetrated with cementitious matrix, which leads associated with the heterogeneity of the concrete and the yarns to a complex load-bearing and failu

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25

Chuang, Bei-Fu, and 莊焙富. "Process Temperatures and Tensile Sress Effects on the Creep Tensile Behavior of Polyester Yarns." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/57236533909537601558.

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碩士<br>國立屏東科技大學<br>土木工程系所<br>100<br>The objective of the study is to investigate the effects of stressing and heating procedures during geogrid manufacture process on the tensile and creep behavior of polyester yarns. Three types of polyester yarns were used in the study. The nominal unit weight of the polyester yarns were 2000, 1500, and 2000 deniers for Type A, Type B, and Type C products, respectively. The test yarns were also treated under heating temperatures of 150C and 170C, and stressing at various loadings. After the heating and stressing process, the treated yarns were also evaluated

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26

Heinrich, Nina. "FE-Modellierung von Elastomerkomponenten mit textilen Verstärkungscorden am Beispiel von Luftfedern." 2020. https://monarch.qucosa.de/id/qucosa%3A74913.

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Neben Reifen, Riemen und Schläuchen zählen speziell auch die Balgwände von Luftfedern zu den Kompositen, da deren weiche Elastomermatrix zur Verstärkung Gewebelagen aus textilen Corden enthält. Diese Verstärkungsträger bestehen aus miteinander verzwirnten Garnen, die ihrerseits einen Zwirn aus polymeren Filamenten darstellen. Luftfederbälge weisen dementsprechend eine hochkomplexe innere Geometrie auf und sind zudem durch stark anisotropes, nichtlineares Materialverhalten gekennzeichnet. Für die strukturmechanische Simulation von Luftfedern mit der Finite-Elemente-Methode (FEM) werden in der v

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27

Chaithanya, Renduchintala. "Relationship between the processing parameters and tensile properties of air textured Kevlar yarns." 2002. http://www.lib.ncsu.edu/theses/available/etd-08022002-092538/unrestricted/etd.pdf.

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28

Mahentra, Gowda R. V. "Influence of frictional characteristics of core and sheath on structure,twist,and tensile properties of DREF-3 friction spun yarns." Thesis, 2001. http://localhost:8080/xmlui/handle/12345678/3878.

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29

Кириченко, Антон Миколайович. "Удосконалення системи подачі нитки круглов’язальних машин великого діаметру на основі стабілізації натягу". Diss., 2021. https://er.knutd.edu.ua/handle/123456789/17866.

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Дисертація присвячена удосконаленню існуючих методів та засобів дослідження умов переробки ниток на круглов’язальних машинах великого діаметру при виготовленні трикотажних полотен для одягу з урахуванням реальних фізико-механічних властивостей сировини, особливостями геометричної форми пружної системи заправки ниток та конструкції її окремих структурних елементів.<br>The thesis is dedicated to improvement of the existing methods and means of studying the conditions of thread processing on large diameter circular knitting machines in production of jersey fabric for clothes with account of the a

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