Comparative Analysis on the Properties of Yarns Formed by Different Contact-shaped Strands Passing through Static Rod and Self-adjustable Disk Surfaces

Xu, Duo; Fan, Heng; Jiang, Huimin; Yang, Shengming; Ni, Junlong; Zhang, Xinling; Xu, Weilin; Liu, Keshuai

doi:10.1080/15440478.2020.1821277

Cited by 3 publications

(4 citation statements)

References 22 publications

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“…The strand is considered as an isotropic material with an elastic modulus of 0.105 GPa, a shear modulus of 0.0403 GPa, and a Poisson's ratio of 0.3. The material density is 1.38 g/cm 3 . The contact friction coefficient between the triangular slope and the strand is 0.5 l, and the strand has a pre-tension of 35 cN.…”

Section: Motion Simulation Modelmentioning

confidence: 99%

“…Staple raw fibers of cotton, wool, or other materials can be steadily twisted into continuous strands, eventually becoming thinner and tighter yarns through twist transmission. [1][2][3] Currently, ring spinning is still the dominant spinning technology in the yarn manufacturing industry owing to its strong adaptability to raw materials, a wide variety of products, and high yarn quality. 4,5 However, it also has disadvantages, such as excessive yarn hairiness and low production efficiency.…”

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confidence: 99%

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The relevance of false-twist addition on ring spun yarns by means of rotary threaded surfaces

Gao

Fan

et al. 2022

Textile Research Journal

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A novel concept of producing false-twist yarns by cyclical stress fluctuation was developed. The forming principle was introduced to analyze the formation process of false twists on rotary threaded contact surfaces. Geometric analysis indicates that cyclical stress variations produce extra rotations (false twists) on fiber strands in the yarn formation area, causing twist redistribution and fiber arrangement remodeling with the appearance of local fiber reversion. Theoretical analysis reveals that more false twists are produced when the spun yarn is in contact with surfaces of high traverse speeds. Then, a motion simulation model using different traverse speeds of the threaded contact surface was established to compare the yarn internal stress variation, verifying the false-twist efficiency at different traverse speeds. Finally, a systematic comparison was conducted between the yarns spun at different traverse speeds. It was shown that the yarn properties improved with higher traverse speeds of the threaded contact surface, achieving less hairiness, high yarn strength, and low residual torque.

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Section: Motion Simulation Modelmentioning

confidence: 99%

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confidence: 99%

The relevance of false-twist addition on ring spun yarns by means of rotary threaded surfaces

Gao

Fan

et al. 2022

Textile Research Journal

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“…Xu et al. 15 built three strand-contacting shapes model, and analyzed the influence of strand contact shape on spinning performance when spinning on the contact surface of static rod self-adjusting disc. Phillips et al.…”

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confidence: 99%

“…It was shown that the proposed yarn structure has a significant negative Poisson's ratio effect, and the geometric analysis can well predict its Poisson's ratio in the high axial strain range. Xu et al 15 built three strand-contacting shapes model, and analyzed the influence of strand contact shape on spinning performance when spinning on the contact surface of static rod self-adjusting disc. Phillips et al 16 mathematically analyzed the slope or gradient of the tension-induced torque by the mechanical control equation for the twisting characteristics of a double-stranded yarn under tension, analysis effect of sandwich twist on the torsional properties of twostranded, three-stranded and four-stranded yarns formulated from 31 textile single yarns and 40 textile single yarns and 80 textile single yarns with singlestranded spinning twist.…”

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confidence: 99%

Effect of fiber twisting on the Z-directional properties of composites

Guo

Shan

Huang

et al. 2022

Textile Research Journal

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To further improve the Z-direction tensile properties of flexible oriented 3D braided composites, we proposed a new process for twisting Z-fibers. We found a pattern of increasing and then decreasing tensile strength after twisting fibers with different K-numbers, and the four bundles of 3K fiber with 20 twists/m had the strongest tensile performance, which increased by 29.06% compared with the untwisted. Scanning electron microscopy was used to observe the twisting morphology and hairiness statistics of fiber bundles to analyze the reasons for this phenomenon. In order to increase the theoretical research on twisted fiber bundles, the relationships between the twist of fiber bundles and the tensile strength of fiber bundles, the length of fiber bundles, and the elongation of fiber bundles were established by using the idea of the least square method, and the prediction of fiber bundle strength was realized by twisting, length, and elongation purpose. The geometric model of the twisted fiber bundle was established, and the relationships between axial strain and radial strain of fiber bundles, axial strain and Poisson's ratio were realized. Combined with finite element simulation, the stress distribution position of the twisted fiber bundle was predicted. Finally, combined with the flexible-oriented three-dimensional weaving method, we selected the fiber with a twist of 20 twists/m as the Z-direction fiber, and completed the Z-direction performance enhancement of the composite material and, compared with the untwisted fiber, the tensile strength was increased by 60.9%.

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Effect of Different Z-directional Fibers on Mechanical Properties of Composites Using Numerical and Experimental Tests

Guo

Shan²,

Huang³

et al. 2022

Appl Compos Mater

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Comparative Analysis on the Properties of Yarns Formed by Different Contact-shaped Strands Passing through Static Rod and Self-adjustable Disk Surfaces

Cited by 3 publications

References 22 publications

The relevance of false-twist addition on ring spun yarns by means of rotary threaded surfaces

The relevance of false-twist addition on ring spun yarns by means of rotary threaded surfaces

Effect of fiber twisting on the Z-directional properties of composites

Effect of Different Z-directional Fibers on Mechanical Properties of Composites Using Numerical and Experimental Tests

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