36—finite-Element Analysis of Yarns Part I: Yarn Model and Energy Formulation

Luijk, C. J. van; Carr, Athol J.; Carnaby, G. A.

doi:10.1080/00405008408658379

Cited by 15 publications

(2 citation statements)

References 4 publications

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“…In the analysis, an idealized core-spun structure, i.e., with zero eccentricity of core spandex, is supposed. The yarn is sub-divided into concentric cylindrical elements, which are almost the same as 'zones' adopted by Luijk [5,6], as shown in Figure 1. The element nearest to the yarn axis is named as SP, which is spandex in the yarn core.…”

Section: Definition Of Yarn Elements and Yarn Geometrymentioning

confidence: 99%

Theoretical Prediction on Tensile Model of Wool/Spandex Core-spun Yarn

Dang

Wang

Liu³

2008

Journal of Industrial Textiles

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With the innovation of spinning method and Lycra® fiber, wool elastic core-spun yarn is applied for more industrial end-uses, which make it meaningful to study the mechanical property of wool/spandex core-spun yarn. Tensile property of staple yarns has been studied by many researchers. However, no research is reported on the tensile property of elastic core-spun yarn. In this paper, a new approach is introduced to calculate and predict tensile property of a wool/ spandex core-spun yarn. The theoretical model introduces a fiber utilization coefficient β to specify the slippage length of fiber. The force on a single fiber is first worked out and then these fiber forces are combined to obtain forces acting on each element. Yarn stress—strain curve is obtained on the basis of wool fiber tensile curve and yarn cross-section structure. Factors, such as dimensions and properties of fiber and yarn, fiber slippage effect, and fiber orientations in the yarn are included in the model. Comparisons of experimental and theoretical tensile curves show that the theoretical model has very good agreement with experimental curves. So this method is valid in predicting the tensile behavior of the wool/spandex core-spun yarn.

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Section: Definition Of Yarn Elements and Yarn Geometrymentioning

confidence: 99%

Theoretical Prediction on Tensile Model of Wool/Spandex Core-spun Yarn

Dang

Wang

Liu³

2008

Journal of Industrial Textiles

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“…An extensive amount of work has been published on yarn mechanics (Hearle, 1969;Luijk, 1984;Morris, 1990;Pan, 1992;Onder, 1996) to predict yarn tensile properties based on the properties of constituent fibres. The extent to which tensile properties of constituent fibres are incorporated into yarn blends has received considerable attention (Ranganathan, 1981;Vinzanekar, 1980;Goswami, 1980; Bargeron, 1978).…”

Section: Introductionmentioning

confidence: 99%

Influence of Polyester Fibre Fineness and Cross-Sectional Shapes on Tensile Properties of Yarns

Kothari

Dhamija²,

Varshney³

2011

Research Journal of Textile and Apparel

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Mechanical properties of 100% polyester and polyester-viscose (P/V) blended yarns produced from polyester fibres which vary in denier and cross-sectional shape have been analyzed. It is observed that fibre fineness and cross-sectional shape play a significant role in the translation of fibre properties to the respective yarn properties. As the fibre linear density decreases, fibre strength translation efficiency increases. In the case of trilobal fibre, translation efficiency is observed to be lower, but yarn breaking elongation is higher in comparison to the corresponding circular fibre. Scalloped oval fibre contributes more towards yarn strength and elongation versus the equivalent circular and tetraskelion fibres. In the P/V blended form, a decrease in yarn tenacity does not affect fibre fineness, but is substantially influenced by changes in the fibre profile. Contribution of broken viscose fibres (comparatively weaker component) at the point of actual breaking of yarn, i.e. Z-value, is altered depending on the polyester fibre profile, which is higher in trilobal and scalloped oval fibres in comparison to the corresponding circular ones, but the role of fibre linear density in this regard is rendered insignificant.

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