37—finite-Element Analysis of Yarns Part Ii: Stress Analysis

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

doi:10.1080/00405008408658380

Cited by 11 publications

(4 citation statements)

References 6 publications

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“…Application of the FE analysis in textile problems was first initiated by Van Lloyd et al [14] and introduced to the yarn structure by Van Luijk [15] later. Van Luijk et al [16,17] applied this method to both continuous filament and staple yarns. There have also been several researches in other textile-related fields, like the papers by Zako et al [18].…”

Section: Finite-element Analysis Of Yarn Balloonmentioning

confidence: 99%

Finite-element and multivariate analyses of tension distribution and spinning parameter effects on a ring-spinning balloon

Mehrabad

Johari

Aghdam

2010

Proceedings of the Institution of Mechanical Engineers, Part C:

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This study aims to investigate the effects of spinning parameters on the balloon tension and configuration. A novel experimental set-up was designed to measure the yarn tension at the pigtail. Experimental results were then used to implement boundary conditions in a multivariate analysis. Also, a finite-element (FE) code was used to predict the yarn balloon profile and stresses induced in the yarn. In particular, Coriolis acceleration and twist effects are considered on the model. It was observed that the equations governing the yarn path and the movement equation of twist in the yarn were completely dependent on each other. FE analysis revealed that while the Coriolis acceleration increases the tension in the yarn, it has little influence on the balloon configuration. Results of this study can be used to obtain optimized production parameters to increase the yarn quality and productivity.

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Section: Finite-element Analysis Of Yarn Balloonmentioning

confidence: 99%

Finite-element and multivariate analyses of tension distribution and spinning parameter effects on a ring-spinning balloon

Mehrabad

Johari

Aghdam

2010

Proceedings of the Institution of Mechanical Engineers, Part C:

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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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“…The particular model used was the contlnuous-filament-yarn analysis [54], which had been checked against an earlier Independent analysis using the same modelling assumptions [55].…”

Section: The Task and Base Assudptionsmentioning

confidence: 99%

A Computer Model for Simulating the Semi-worsted Processing of Wool

Elliott¹,

Carnaby²,

Dent

1987

The Journal of The Textile Institute

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A model for the computer simulation of the processing of scoured wool through to singles yam via the semi-worsted system Is described on the basis of published empirical and theoretical literature.The model accounts for changes in the properties of scoured wool and processing variables over a range of values coBK>n In the commercial semi-worsted processing of New Zealand wools. The production and yam parameters that are predicted Include yam Irregularity, breaking load, and hulk; ends down In splQnlog; fibre loss as card waste; and card-mixing capacity.

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37—finite-Element Analysis of Yarns Part Ii: Stress Analysis

Cited by 11 publications

References 6 publications

Finite-element and multivariate analyses of tension distribution and spinning parameter effects on a ring-spinning balloon

Finite-element and multivariate analyses of tension distribution and spinning parameter effects on a ring-spinning balloon

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

A Computer Model for Simulating the Semi-worsted Processing of Wool

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