Theoretical Study on the Biaxial Tensile Properties of Single Tricot Warp Knitted Fabric with Open Lap

Yanagawa, Yoshiki; Kawabata, Sueo; Nakagawa, Kenji; Toyama, Kiyonori; KAWAI, N.

doi:10.4188/jte1955.16.216

Cited by 8 publications

(3 citation statements)

References 2 publications

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“…Thus, once m is known, equation ( 1) can be used to determine whether interyarn slippage occurs. The range of m for yarn-to-yarn friction is approximately (Yanagawa et al, 1970). If the ratio on the left-hand side of equation ( 1) is high relative to m, the interlacing yarns are likely to slip during fabric extension.…”

Section: 3/4mentioning

confidence: 99%

Structural mechanics of knitted fabrics for apparel and composite materials

Postle

2002

International Journal of Clothing Science and Technology

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The importance of fabric biaxial extension, in-plane compression, shear and bending properties, have been widely recognised by textile scientists and engineers for the evaluation of the three-dimensional formability and drape of textile materials in apparel products and threedimensional preforms. In contrast to woven fabrics where bending and shear properties determine the fabric formability, knitted fabrics have very high formability as a direct result of their easy biaxial extension properties. This ability to form three-dimensional shapes using the biaxial extensibility of knitted structures enables these knitted textile materials to be utilised for a wide variety of close fitting apparel garments and shaped composite preforms. Some representative biaxial extension curves for the plain knitted structure are described in this paper. These curves illustrate an unusual shape for the load-extension curve of a textile material arising from the pretension or pre-stress. The pre-stress yields an initial high tensile modulus for the structure in contrast to the very low initial modulus characteristic of apparel textiles. Accordingly, for knitted textile materials, it is shown how biaxial extension of the fabric introduces a fabric pre-stress to maximise the three-dimensional fabric formability especially when subjected to transverse compression by the resin or matrix in a composite material. Typical uniaxial and biaxial tensile stress-strain curves for knitted fabrics are compared.

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Section: 3/4mentioning

confidence: 99%

Structural mechanics of knitted fabrics for apparel and composite materials

Postle

2002

International Journal of Clothing Science and Technology

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“…Most of these investigations were based on plain weft-knitted structure and a single loop was used as a unit cell for analysis. 11 Yanagawa and colleagues 12,13 developed the analytical method for calculation of the tensile properties of single tricot warp knitted fabrics, but it is limited to biaxial stress of knitted fabric from conventional yarn.…”

Section: Introductionmentioning

confidence: 99%

Stretch properties of elastic knitted fabric with pillar stitch

Kyzymchuk

Melnyk

2018

Journal of Engineered Fibers and Fabrics

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Knitted fabrics and products are subjected to a variety of stresses and loads/deformation during their usage. The loads are different by value, by direction, and by duration. The alternations of loading and unloading or resting processes affect the knitted structure and could bring about changes in the linear dimensions of the fabric or result in the deformation of the knitted items and ultimately the loss of product appearance or its functional properties. A wide range of textile materials resistant to multiply loads was produced by using elastomeric yarn that has an elongation of more than 95% and is able to attain full recovery after relaxation due to its chemical composition. This case study examines two existing test methods for evaluating the stretch properties of textile materials produced with the elastomeric yarns with emphasis on warp knitted abdominal binder-type fabrics. It was found that the linear density of the weft in-laying threads and the preliminary tension of the ground yarn which formed pillar stitch affect stretch properties of elastic warp knitted fabric: the full deformation and its constituent parts. The change in the preliminary elongation of the bare spandex in the 210%-270% range does not have a significant effect.

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“…z Two geometrical studies have been reported, one by Grosberg [5], who considers double bar closed lap structures, and another by Yanagawa et al [ 19,20] who examine single bar fabrics. These models possess the usual limitations arising from geometrical fabric models and make physically unrealistic assumptions about the nature of yam contact and fabric thickness effects.…”

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Analysis of the Single Bar Warp Knitted Structure Using an Energy Minimization Technique

Hart

Jong

Postle

1985

Textile Research Journal

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These results suggest that there appears to be a good correlation between the degree of lateral order, shrinkage, crystallinity, and crease recovery angle on the one hand and the dimensional deformation on the other. Deformation and, subsequently, the dimensional stability of fibers can thus be assumed quickly by observing in the SEM the shapes and distortions of simple overhand knots prepared from the fibers under standard tensions. ACKNOWLEDGMENTSWe wish to thank Dr. T. Radhakrishnan, director, ATIRA, for permission to publish this work.

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Theoretical Study on the Biaxial Tensile Properties of Single Tricot Warp Knitted Fabric with Open Lap

Abstract: The biaxial tensile properties of single tricot warp knitted fabrics v ith an open lap have been calculated theoretically by developing the analysing method used on the close lap structure.

Cited by 8 publications

References 2 publications

Structural mechanics of knitted fabrics for apparel and composite materials

Structural mechanics of knitted fabrics for apparel and composite materials

Stretch properties of elastic knitted fabric with pillar stitch

Analysis of the Single Bar Warp Knitted Structure Using an Energy Minimization Technique

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