15—the Initial Shear Modulus of Plain-Woven Fabrics

Leaf, G. A. V.; Sheta, Aida M.F.

doi:10.1080/00405008408658477

Cited by 32 publications

(20 citation statements)

References 10 publications

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“…This leads to reduction in the available warp yarn free length of bending during the initial stage of the shear fabric deformation cycle. The increase in fabric initial shear rigidity according to the proposed equations by Grossberg and Park 9 and Leaf and Sheta 11 is inversely proportional to the yarn free length of bending. This is in line with the observed increase in the initial shear rigidity of fabrics woven with polyester weft yarns.…”

Section: Resultsmentioning

confidence: 92%

“…Weft and warp yarns at the intersection points in the fabric can be assumed to be welded when considering the proposed equations by Grossberg and Park 9 and Leaf and Sheta. 11 In other words, in the initial stage of woven fabric shear deformation, the magnitude of the applied shear force is inadequate to cause yarn slippage. Thus, under this assumption, the bending of yarns is the only probable deformation that can take place.…”

Section: Resultsmentioning

confidence: 99%

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Effect of a weft yarn spinning system on the shear characteristics of plain woven fabrics

Shanbeh

Johari

Zarrebini

et al. 2019

Textile Research Journal

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Spun yarns are almost entirely produced using ring, rotor and relatively new air vortex spinning systems. In this study, shear properties of fabrics woven with cotton, viscose, and polyester yarns spun using ring, rotor, and vortex spinning systems were investigated. Experimentally determined shear characteristic-related factors, such as initial shear rigidity, shear rigidity, shear hysteresis at a 0.5 degree shear angle, and shear hysteresis at a 5 degree shear angle along the principle directions, were statistically analyzed. In addition, differences between the shear behaviors of the woven fabric samples were identified using the digital image correlation (DIC) technique. While our analyses confirm the statistically significant difference between the shear behavior of samples woven with ring-spun yarns and samples woven with rotor and vortex yarns in the weft direction, no significant difference in shear behavior between the samples woven with rotor and vortex yarns was observed. It was found that the yarn spinning system has no significant effect on fabric shear characteristics in the warp direction. It also was concluded that the DIC technique can successfully be used to analyze the differences in shear characteristics of fabrics woven by various type of spun yarns.

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Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Effect of a weft yarn spinning system on the shear characteristics of plain woven fabrics

Shanbeh

Johari

Zarrebini

et al. 2019

Textile Research Journal

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“…According to the research conducted by Leaf and Sheta, when a fabric ensconces under tensile load in the bias direction, the Young modulus of the bias sample ( E 45 ) is related to the shear modulus ( G ) as follows [30] where E 1 and E 2 refer to the Young modulus in the warp and weft directions, and σ 1 and σ 2 represent the fabric Poisson ratio in the warp and weft directions, respectively.…”

Section: Methodsmentioning

confidence: 99%

Section: Calculation Of the Shear Modulusmentioning

confidence: 99%

The effects of UV degradation on the physical, thermal, and morphological properties of industrial nylon 66 conveyor belt fabrics

Moezzi

Yekrang

Ghane

et al. 2019

Journal of Industrial Textiles

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In this study, nylon 66 industrial fabrics (used in the conveyor belts) were exposed artificially to the accelerated ultraviolet rays and the degradation mechanism was evaluated using spectral, thermal, and morphological analyses. The fabric samples were exposed to six different exposure times in a UV chamber and tensile tests were carried out in the main and bias (45°) directions. The results showed that the shear modulus was reduced in the early stages covering 4 h of the UV radiation because of the linkages breakage and the increase in the amorphous regions. However, after this early stage, the shear modulus started to increase. The Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) analysis, and X-ray photoelectron spectroscopy (XPS) study were also performed to evaluate the surface morphology and the degradation mechanism of the nylon 66 fibers after UV illumination. The results also revealed that the formation of new links by free radicals caused the change in the bond wavelengths. Furthermore, it was found that there was an interesting mechanism for the UV degradation of nylon 66 fabrics at different exposure times, as confirmed by the results obtained regarding the mechanical properties of the samples. The results of this study can be, therefore, helpful for the industrial application of nylon 66 woven conveyor belts exposed to solar UV radiation.

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“…They estimated the value of k using the &dquo;best fit&dquo; method from experimental data for 33 fabrics, which ranged from 0.43 to 0.53 (for warp and weft); this value corresponds to values obtained with a similar method by Leaf and Sheta [ 10] for the corresponding shear model. Measured values of B flB, lie in the range from 1.2 to 2.8, with a 30% error interval.…”

mentioning

confidence: 98%

A Predictive Model for the Fabric-to-Yarn Bending Stiffness Ratio of a Plain-Woven Set Fabric

Lomov

Truevtzev

Cassidy

2000

Textile Research Journal

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A model for woven fabric behavior in bending is formulated based on a representation of fabric deformation as a coordinate transformation. The model is essentially based on previously published assumptions of yarn behavior but provides predictions closer to real fabric properties. It uses the energy approach for mechanical problems of textiles and employs a polynomial approximation of the thread shape. The mathematically subtle contact problem of yarns within a fabric can be turned into a more general consideration of yarn compression, and this can be investigated by independent, practical experimentation. Comparison with previously published experimental data for a variety of thread types and fabric parameters shows reasonable agreement between predicted and measured bending stiffness of plain woven fabric.

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15—the Initial Shear Modulus of Plain-Woven Fabrics

Abstract: By G. A. V. LEAF and AIDA M. F. SHETA I 'A theoretical expression for the initial shear modulus of a plain-woven fabric is derived and is then compared with the moduli of a range of woven fabrics.

Cited by 32 publications

References 10 publications

Effect of a weft yarn spinning system on the shear characteristics of plain woven fabrics

Effect of a weft yarn spinning system on the shear characteristics of plain woven fabrics

The effects of UV degradation on the physical, thermal, and morphological properties of industrial nylon 66 conveyor belt fabrics

A Predictive Model for the Fabric-to-Yarn Bending Stiffness Ratio of a Plain-Woven Set Fabric

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