Relevant bibliographies by topics / Twisted yarn

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Twisted yarn'

Author: Grafiati
Published: 4 June 2021
Last updated: 5 February 2022

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Journal articles on the topic "Twisted yarn"

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Et. al., Yuldashev Alisher Tursunbayevich,. "Investigation of Influence ofa New Twist Intensifier on the Properties of the Twisted Yarn." Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 5 (April 10, 2021): 1943–49. http://dx.doi.org/10.17762/turcomat.v12i5.2275.

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The article is devoted to the study of the properties of the yarn obtained by the methods of ring and rotor spinning, for twisted yarn, produced on a VTS-09 double twist machine made by Volkmann (Germany). Experiments were carried out on two typesof spinning yarns with yarn counts Ne 20/2 and 12/2 in the existing design (control) and the new design, flexible element with equal tension and twist intensifier and compared the effects of the resulting twisted yarn for quality parameters. Mathematical statistical methods (single-factor analysis of variance) were used to assess the quality of twisted yarn. Experiments have shown that the use of a new design nozzle reduces the vibration of the yarn, which leads to a uniform distribution of twists along the length of the twisted yarn, increases its tensile strength and improves the quality of the twisted yarn.
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Zaidi, Badar Munir, Jin Zhang, Kevin Magniez, Hongbo Gu, and Menghe Miao. "Optimizing twisted yarn structure for natural fiber-reinforced polymeric composites." Journal of Composite Materials 52, no. 3 (April 28, 2017): 373–81. http://dx.doi.org/10.1177/0021998317707333.

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Natural plant fibers need to be spun into yarns to produce textile preforms for structural composites. The twist in the spun yarn causes fiber misalignment. This paper reports the construction of a two-ply yarn from such twisted yarn with improved fiber alignment to maximize the mechanical performance of resulting composites. This is achieved by twisting two twisted singles yarns in the opposite direction. The level of opposite-direction ply twist as a percentage of the twist in the initial singles yarn has shown a significant influence on the tensile and flexural properties of the final composites. The maximum performance is achieved when the ratio between the ply yarn twist and the singles yarn twist was approximately 0.3, which coincides with the ratio for achieving maximum Krenchel fiber orientation factor for the two-ply yarn as predicted by a geometrical model. This ply yarn twist/singles yarn twist ratio can be used as a design guideline for natural fiber yarns used as reinforcement for load-bearing composites.
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Yan, Taohai, Yajing Shi, Huimin Zhuang, Yu Lin, Dongdong Lu, Shengbin Cao, and Lvtao Zhu. "Electrospinning Mechanism of Nanofiber Yarn and Its Multiscale Wrapping Yarn." Polymers 13, no. 18 (September 20, 2021): 3189. http://dx.doi.org/10.3390/polym13183189.

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To analyze the feasibility of electrospinning nanofiber yarn using a wrapping yarn forming device, electrospun nanofiber-wrapped yarns and multiscale yarns were prepared by self-made equipment. The relationship between the surface morphology and properties of yarn and its preparation process was studied. The process parameters were adjusted, and it was found that some nanofibers formed Z-twisted yarns, while others showed exposed cores. To analyze the forming mechanism of electrospun nanofiber-wrapped yarn, the concept of winding displacement difference in the twisted yarn core A was introduced. The formation of nanofiber-wrapped structural yarns was discussed using three values of A. The starting point of each twist was the same position when A = 0 with a constant corner angle β. However, the oriented nanofiber broke or was pulled out from the gripping point when it was twisted, and it appeared disordered. The forming process of electrospun nanofiber-wrapped yarn displayed some unique phenomena, including the emission of directional nanofibers during collection, fiber non-continuity, and twist angle non-uniformity. The conclusions of this research have theoretical and practical value to guide the industrial preparation of nanofiber yarns and their wrapped yarns.
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Naik, N. K., and V. Madhavan. "Twisted impregnated yarns: Elastic properties." Journal of Strain Analysis for Engineering Design 35, no. 2 (February 1, 2000): 83–91. http://dx.doi.org/10.1243/0309324001514044.

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Twisted yarns are normally used for increasing the lateral cohesion of filaments and also for ease of handling. By twisting yarns, the microdamage can be localized, leading to possible increase in the failure strength of the yarns. In this paper, an analytical method is presented for predicting the elastic properties of twisted impregnated yarns made of long unbroken filaments. In the analysis, various degrees of twist in filaments at different radii of the yarn and possible migration and microbuckling are considered. The effects of the twist angle and the extent of migration and microbuckling on the elastic properties and the pre-straining of the yarn are presented.
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Lou, Ching-Wen, Chih-Hung He, and Jia-Horng Lin. "Manufacturing techniques and property evaluations of conductive elastic knits." Journal of Industrial Textiles 49, no. 4 (July 28, 2018): 503–33. http://dx.doi.org/10.1177/1528083718791343.

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Textiles can have valuable functions in terms of measurement, detection and communication when they are incorporated into functional electronic devices. However, the additional electric circuits limit the flexibility and extensibility, making the wearers uncomfortable and the manufacturing difficult. Therefore, in this study, conductive elastic knits are made of metallic yarns and expected to be used as wearable electronic textiles. In order to retain the flexibility of knits, a crochet machine with jacquard equipment is used to create knit patterns as electric circuits. Regardless of whether it is single-twisted yarn, double-twisted yarn, single-wrapped yarn, or double-wrapped yarn, the metallic wires can be completely covered in polyester filaments. Variations in twist numbers of conductive yarns or knit patterns are beneficial to the tensile strength with a maximum increment of 14%, and changing twist numbers of conductive yarns or knit patterns have a positive influence on the air permeability with a maximum increment of 24%. According to the results of the electric circuit stability test, using double-covered yarns ensures the knits a stabilized electric circuit regardless of the knit pattern.
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Naik, N. K., and M. N. Singh. "Twisted impregnated yarns: Transverse tensile strength." Journal of Strain Analysis for Engineering Design 36, no. 4 (May 1, 2001): 347–57. http://dx.doi.org/10.1243/0309324011514520.

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Twisted yarns are normally used for increasing the lateral cohesion of filaments and also for ease of handling. In this paper, an analytical method is presented for predicting the effective transverse tensile strength of the twisted impregnated yarns made of continuous filaments. In the analysis, a varying degree of twist in filaments at different radii of the yarn is considered. The effect of the twist angle on the transverse tensile strength properties of the twisted impregnated yarns is presented. It is seen that there can be an increase in transverse tensile strength of the twisted impregnated yarns compared with that of the corresponding impregnated strands.
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Sekerden, Filiz. "A Comparative Analysis of Towels Produced from Twisted and Twistless Cotton Pile Yarns in Terms of Absorptive Capacity and Flexural Rigidity." Journal of Engineered Fibers and Fabrics 10, no. 1 (March 2015): 155892501501000. http://dx.doi.org/10.1177/155892501501000111.

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The study compares cotton towels produced from twisted and twistless cotton pile yarn. The towels were manufactured with different weft density, different weft yarn counts, and different pile heights. The water absorptive capacity, absorbency time and flexural rigidity properties of twisted pile towels were compared with those of twistless pile towels. The test results were evaluated using statistical analysis. Effects of twisted and twistless pile yarn, pile height, weft density, and weft yarn count on absorptive capacity, absorbency time, and flexural rigidity of fabrics were examined using analysis of variance (ANOVA). The results indicate that the towels woven with twistless pile yarns have greater absorptive capacity, longer absorbency time, and lower flexural rigidity than towels woven with twisted pile yarns.
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Zhong, Ya Hong, Jian Hui Ma, and Ming Jie Xing. "Fiber Configuration of Air Jet Vortex Spinning Yarns." Advanced Materials Research 834-836 (October 2013): 1784–88. http://dx.doi.org/10.4028/www.scientific.net/amr.834-836.1784.

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In this paper, the spinning process of air jet vortex spinning was described. The structure of air jet vortex spun yarn was studied by means of blending tracer fibers in spinning. Then the yarns were viewed with the optical microscope and SEM etc. The result shows that air jet vortex spun yarn comprises two parts. The outer layer, composed of twisted fibers, presents helical form. And the inner layer contains about 30% fibers untwisted or slackly twisted. The distance between twisted fiber groups is very short, so the borderline isnt obvious. There is a certain angle between core fibers in parallel and the axes of the yarn. The coefficient of fiber migration of the yarn was calculated, and it is lower than that of ring spun yarn and compact spun yarn.
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Nakamura, Rie, and Koichi Goda. "Effect of Yarn Structure on Mechanical Properties of Twisted Yarn Composites." Materials Science Forum 783-786 (May 2014): 1554–59. http://dx.doi.org/10.4028/www.scientific.net/msf.783-786.1554.

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T wisted yarns are used for bio-composites and nanocomposites as reinforcement . In a twisted yarn, single yarns migrate from surface to inner along the yarn axis. In this research , migration structure is studied by using X-ray CT system . The result is obtained that the orientation angle correlates with layer .
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Sriprateep, Keartisak, and Erik LJ Bohez. "CAD/CAE for stress–strain properties of multifilament twisted yarns." Textile Research Journal 87, no. 6 (July 22, 2016): 657–68. http://dx.doi.org/10.1177/0040517516636000.

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A method is presented for modeling the tensile behavior of multifilament twisted yarns. A filament assembly model and a computer-aided design/computer-aided engineering (CAD/CAE) approach are proposed for the tensile analysis. The geometry of the twisted yarn and the nonlinear filament properties were considered. The finite element method (FEM) and large deformation effects were applied for computation of the stress–extension curves. Ideal yarn structures of five layers with different twist angles were simulated to predict the tensile behavior of each filament and each layer. The stress acting on the filaments after yarn extension could be directly analyzed by the FEM. The stress distribution in the filaments showed that the highest stress regions were located at the filament in the center of the yarn and decreased slightly to the yarn surface. The stress–extensions of the filaments were converted to yarn tensile behavior that is shown in terms of the maximum and average stress–extension curves. The results of this prediction model were compared with the stress–strain curves of high-tenacity rayon yarn and the energy method. The maximum stress–extension curves showed very good agreement with experimental results and are more accurate than those obtained by previous methods.
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Dissertations / Theses on the topic "Twisted yarn"

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Kianzad, Soheil. "A treatise on highly twisted artificial muscle : thermally driven shape memory alloy yarn and coiled nylon actuators." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/54782.

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A new perspective in the field of actuators was opened by the demonstration of multiwall carbon nanotube based actuators by Foroughi et al, in 2011. The approach involves applying a high degree of twist to create large torsional actuation in carbon nanotube yarns, and more recently in coiled nylon filaments. In this thesis torsional actuation is further studied in nylon, and extended to shape memory alloys (SMA). Torsional actuation is demonstrated using 25 μm diameter micro strands of shape memory alloy (SMAs) that are twisted together. These form yarns with Young’s modulus of 13.5 GPa in the Martensitic phase and 18 GPa in the Austenite state. In torsion, the SMA yarns show more than 8,000 rpm peak rotational speed with 11 reversible rotations for an 8 cm long yarn. This is observed upon applying 0.47 W/cm electrical input power. Providing more than 5 N.m/kg torque, SMA yarns may be of interest in biomedical and other applications. The mechanical behaviour of coiled nylon actuators is studied by testing elastic modulus and by investigating tensile stroke as a function of temperature. Loads that range from 35 MPa to 155 MPa were applied. For the nylon and the coiling conditions used, active thermal contraction totals 19.5 % when the temperature is raised from -40 ⁰C to 160 ⁰C, with most contraction above the glass transition temperature. Introducing various cooling methods was shown to enable increased rate of actuation up to several Hertz. Nylon coiled actuators potentially provide affordable and viable solutions for driving mechanical devices as recently demonstrated in robotic hands and arms. A new biomimetic arrangement of the nylon actuator is presented that imitates the human pennate muscle in structure, including the ability to vary stiffness by a factor of 9 and to increase isometric force from 19 N to 37 N by recruiting additional fibers.
Applied Science, Faculty of
Electrical and Computer Engineering, Department of
Graduate
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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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Srinivasan, K. V. "A study of the principles of hollow spindle wrap spinning." Thesis, University of Manchester, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.556204.

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Fellague-Ariouat, Abdelkader. "Design and analysis of primary heaters for false-twist texturing machines." Thesis, Queen Mary, University of London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.339193.

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Guo, Mingzhi. "A re-examination of twisting systems in false-twist texturing." Thesis, University of Leeds, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329207.

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Miao, Menghe. "The insertion of twist into yarns by means of air-jets." Thesis, University of Leeds, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329209.

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Elkhamy, Donia Said Ko Frank K. Li Christopher Yuren. "Processing mechanics of alternate twist ply (ATP) yarn technology /." Philadelphia, Pa. : Drexel University, 2007. http://hdl.handle.net/1860/1859.

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Perera, Nirmali. "Effect of filament properties and twist on the bending behaviour of continuous filament yarns." Thesis, University of Leeds, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.539322.

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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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CHI, CHIANG-CHENG, and 江政錡. "Effect of False-Twisted Texturing Parameters on Ramie like yarn." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/15851031160186982967.

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碩士
逢甲大學
紡織工程所
93
This thesis is to research and investigate the process, characteristics and fabric touch of the polyester imitating the natural fiber of Ramie yarn; thus the yarn can be widely used in daily commodities. JAPAN MURATA 33H friction false twisted texturing machine is used to experiment processes with varied drawing ratios (DR), twister velocity ratio (VR), heating temperature (H1), yarn speed (YS) to produce poly (ethylene terephthalate) Ramie like yarn out of polyester (Partially Oriented Yarn)(POY). Experimental results show that when the heating temperature is raised, the yarn produces more SHARI touch and Ramie touch, especially when the heating temperature is between 240℃ and 250℃, the Ramie touch is the best. As yarn speed gains higher and higher, the put in twist tension (T1) and put out twist tension (T2) get looser and looser until the yarn tension remains shaking and can''t be measured. Experiments show that yarn speed between 400 m/min and 500 m/min suits most for false twisted texturing process. The crimp elasticity improves with the higher twister velocity ratio value. The friction disk gives the yarn much more texture twist and torgue curly, which results in better SHARI touch. The increased drawing ratio enhances the orientation of molecular; the uniform arrangement of molecular contributes to higher fiber strength but cuts down SHARI touch. Therefore, to get better SHARI touch during tight spot texturing process, the drawing ratio should be low not high. To sum up, in order to improve and get the best texture yarn SHARI touch during tight spot texturing process, the most favorable texturing parameters are 450 m/min for yarn speed, 1.36 for drawing ratio, 245℃ for heating temperature , 1.82 for twister velocity ratio . The test of sampled texturing yarn and woven fabric for Kawabeta Evaluation System fabric touch shows that it is similar to nature Ramie yarn in surface friction and roughness. Such made Polyester Ramie like yarn has the characteristics of SHARI and stiffness, which can be widely applied to knit fabrics, shirts, underwear, suits, household clothing and so on.
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Books on the topic "Twisted yarn"

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Khan, A. N. False-twist texturing of staple yarns. Manchester: UMIST, 1994.

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Miah, M. R. K. The twist contraction of continuous filament yarns. Manchester: UMIST, 1993.

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Khan, A. N. Twist loss of the weft yarn in air-jet weaving its mechanism and its effedt on the pilling property of the fabriac. Manchester: UMIST, 1991.

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Wilson, D. K. The production of textured yarns by methods other than the false-twist technique: A critical appreciation of recent developments. Manchester: Textile Institute, 1987.

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Brorens, P. H. The effect of twist on the felting behaviour of singles and two-fold woollen carpet yarns in the rub-felting process. Christchurch: Wronz, 1987.

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Gillam, Norm. Buttered 'N' Twisted Yarns. iUniverse, 2003.

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False Twist Textured Yarns Woodhead Publishing in Textiles. Woodhead Publishing, 2012.

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Atkinson, C. False Twist Textured Yarns: Principles, Processing and Applications. Elsevier Science & Technology, 2018.

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Barton, Su. Twisted yarns: [the story of the hosiery industry in Hinckley]. North Warwickshire & Hinckley College, 1999.

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Atkinson, C. False twist textured yarns. Woodhead Publishing Limited, 2012. http://dx.doi.org/10.1533/9780857095596.

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Book chapters on the topic "Twisted yarn"

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Gooch, Jan W. "Self-Twist Yarn." In Encyclopedic Dictionary of Polymers, 653. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_10445.

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Atkinson, C. "Draw textured yarn variants and speciality yarns." In False Twist Textured Yarns, 152–55. Elsevier, 2012. http://dx.doi.org/10.1533/9780857095596.152.

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"False-twist process." In Yarn Texturing Technology. CRC Press, 2001. http://dx.doi.org/10.1201/9781439823088.ch4.

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Hearle, J. W. S., L. Hollick, and D. K. Wilson. "False-twist process." In Yarn Texturing Technology, 97–150. Elsevier, 2001. http://dx.doi.org/10.1533/9781855737655.97.

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"Self-twist yarn." In Encyclopedic Dictionary of Polymers, 870. New York, NY: Springer New York, 2007. http://dx.doi.org/10.1007/978-0-387-30160-0_10253.

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Oxtoby, Eric. "REPCO SELF-TWIST SPINNING." In Spun Yarn Technology, 158–66. Elsevier, 1987. http://dx.doi.org/10.1016/b978-0-408-01464-9.50019-0.

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"False-twist textured yarns." In Yarn Texturing Technology. CRC Press, 2001. http://dx.doi.org/10.1201/9781439823088.ch5.

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Hearle, J. W. S., L. Hollick, and D. K. Wilson. "False-twist textured yarns." In Yarn Texturing Technology, 151–84. Elsevier, 2001. http://dx.doi.org/10.1533/9781855737655.151.

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Atkinson, C. "Yarn texturing machine design." In False Twist Textured Yarns, 28–58. Elsevier, 2012. http://dx.doi.org/10.1533/9780857095596.28.

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Atkinson, C. "Yarn twist application methods." In False Twist Textured Yarns, 59–85. Elsevier, 2012. http://dx.doi.org/10.1533/9780857095596.59.

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Conference papers on the topic "Twisted yarn"

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Dargazany, Roozbeh, Jiaqi Lin, Hamid Mohammadi, and Vahid Morovati. "Modeling Tensile-Torsion Response of Double Twisted Helical Yarns." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-88265.

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Multi-level helical twisted structures represent an example of how natural design achieved an optimized approach for creating a tough and strong fiber from often weak and soft microscale yarns through a hierarchical architecture. In this work, a constitutive model is presented to describe the load transfer within a double twisted helical structures in large deformation regime. The model aims to establish the torsion-tensile properties of fibers as an assembly of twisted yarns and filaments. The model associates the fiber response to the mechanics and the geometry of yarns in the deformed state. In this work, we mainly focus on elastic response of the material and thus inelastic damages were not considered. We modeled the inter-yarn forces that can cause friction. By considering the deformation induced changes in the geometry of constituents, the model describes the influence of the fiber composition parameters such as helical angel of the filaments, prestretch, pretwist of the yarns and the inter-yarn frictions, on the mechanical response of fibers. The model provides a detailed outlook into load transfer within fibers which helps us understand how to design fibers with certain performance.
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Xu, BinGang, and XiaoMing Tao. "Investigation of Yarn Twist Propagation in Rotor Spinning." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-39488.

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This paper proposed an integrated mechanical approach for yarn dynamics in rotor spinning, especially the twist propagation in the yarn forming process from fibers collected in a rotor groove to the twisted yarn at the twist stopper. Equations of dynamic equilibrium in different yarn forming regions were established, and further, expressed in terms of dimensionless variables. Then the yarn tension and twist distribution, considering the dynamic coupling effects between different regions under the steady spinning conditions, were numerically simulated, in which influences of various dimensionless parameters of rotor spinning on the yarn tension and twist distributions were discussed in details.
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Khanbolouki, Pouria, and Mehran Tehrani. "Viscoelastic Behavior of Carbon Nanotube Yarns and Twisted Coils." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-88095.

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Coiled structures made from polymer and Carbon Nanotube (CNT) yarns are used as artificial muscles, stretchable conductors, and energy harvesters. The purpose of this work is to present our latest understanding of the mechanical behavior of these CNT-based structures. CNT yarns are fabricated by inserting twists in sheets spun from CNT forests. Over twisting the CNT yarns results in coiled CNT yarns, similar to a spring where the spring radius is comparable to the diameter of the CNT yarn. In this study, we explain the development and validation of a viscoelastic model, to capture damping and hysteresis in CNT yarns under quasi-static and dynamic loads. Confirmation of linear viscoelastic behavior of CNT yarns can lead us to the development of a model for coiled CNT yarns. Coiled CNT yarns, on the other hand, show a complex non-linear viscoelastic behavior. Possible mechanisms responsible for this non-linear behavior are discussed.
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Freeman, Joseph W., Mia D. Woods, Damond A. Cromer, Lee D. Wright, and Cato T. Laurencin. "A Novel Braid-Twist Scaffold for ACL Repair: Control of Stress-Relaxation Properties." In ASME 2008 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2008. http://dx.doi.org/10.1115/sbc2008-192328.

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The anterior cruciate ligament (ACL) is critical for knee stability when walking or running. Unfortunately, it does not heal well after significant tearing or rupture and surgery is often necessary to reconstruct the injured ligament. Though ACL ruptures are quite common, the surgical repair of this ligament has inconsistent success rates [1]. The goal of this study was to characterize a biomimetic tissue engineered ACL scaffold using a novel combination braid-twist technique. The braid-twist scaffolds were made using the following procedure: • Nine groups of six 160 mm length PLLA fibers were selected. • Each group of six fibers was twisted in a counter-clockwise manner to form a fiber bundle (a total of nine fiber bundles/scaffold). • Three of these bundles were twisted around one another counter-clockwise to form a yarn (a total of three yarns/scaffold). • These three yarns were braided together to form one scaffold. This technique is based on the structure of ACL tissue and is designed to reduce scaffold fatigue and accurately mimic ACL behavior.
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Kanakannavar, Sateeshkumar, and Jeyaraj Pitchaimani. "Comparative study of natural fibre 3D braided yarn woven fabric and simply twisted yarn woven fabric reinforced epoxy composites." In ADVANCES IN MECHANICAL DESIGN, MATERIALS AND MANUFACTURE: Proceeding of the Second International Conference on Design, Materials and Manufacture (ICDEM 2019). AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0003926.

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Prakash, Raghu V., and Vishnu Viswanath. "Effect of Sea-Water Environment on the Tensile and Fatigue Properties of Synthetic Yarns." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-10230.

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Abstract Synthetic fibers are used for critical performance applications of marine rope and cable industries, apart from military applications. The high strength-to-weight ratio and corrosion resistance offered by polymeric synthetic fibers makes them superior alternatives to steel wire ropes particularly in marine applications. These marine ropes and cables are subjected to a complex history of static and cyclic mechanical loading during service, leading to sudden and unexpected failure. The presence of corrosive sea water medium during service adds to the complexity of the problem. Thus, it is essential to study the tensile and fatigue performance of these synthetic fibers in the presence of sea water. In this study, experiments were conducted to examine the effect of marine environment on Vectran (Liquid Crystal Polymer) yarns. The first set of experiments analyzed the tensile strength degradation of Vectran yarns when exposed to simulated sea water for two months. The experiments were performed on Parallel continuous filament yarns and Twisted continuous filament yarns (0.5 twists per centimetre) and the results compared. In the second set of experiments, Vectran yarns were subjected to load controlled fatigue in dry state and continuously wetted state under tension-tension loading at a nominal frequency of 0.1–0.5 Hz. Stress vs. Number of cycles graphs were plotted to compare the fatigue performance in dry and wet conditions. Fatigue experiments were performed on Parallel and Twisted yarns to study the combined effect of twisting and wetting. Scanning Electron Microscopy was used to observe filament surface and failure mechanism. The results indicate that, twisting the continuous filament yarns improves both tensile strength and fatigue performance. Sea water exposure degrades the tensile strength of Parallel yarns. Twisted yarns show no such degradation. The fatigue performance of Parallel yarns appears to be higher in dry state compared to wet state. The fatigue performance of Twisted yarns seems to increase with wetting. SEM images show that failure of filaments is by severe fibrillation.
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7

Madhavan, Vijay, and N. Naik. "Elastic behavior of twisted impregnated yarns." In 40th Structures, Structural Dynamics, and Materials Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1999. http://dx.doi.org/10.2514/6.1999-1298.

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Weerasinghe, P. V. T., Nandula D. Wanasekara, D. G. K. Dissanayake, H. M. Ravindu T. Banadara, N. D. Tissera, R. N. Wijesena, K. M. N. de Silva, and Anushanth Karalasingam. "All Organic, Conductive Nanofibrous Twisted Yarns." In 2019 IEEE 14th International Conference on Nano/Micro Engineered and Molecular Systems (NEMS). IEEE, 2019. http://dx.doi.org/10.1109/nems.2019.8915591.

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Santoso, Daniel, Deddy Susilo, and Yahya Y. Prasetyanto. "A microcontroller-based yarn twist tester." In 2014 Electrical Power, Electronics, Communications, Controls and Informatics Seminar (EECCIS). IEEE, 2014. http://dx.doi.org/10.1109/eeccis.2014.7003715.

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Yang, Jianhui, Huan Zhang, and Changlin Qian. "Influence of Yarn Twist on the Quality of Rotor Spun Viscose Yarn." In 2017 3rd International Forum on Energy, Environment Science and Materials (IFEESM 2017). Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/ifeesm-17.2018.149.

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