Development of helical auxetic yarn with negative Poisson’s ratio by combinations of different materials and wrapping angle

Ullah, Tehseen; Ahmad, Sheraz; Nawab, Yasir

doi:10.1177/1528083720941116

Cited by 15 publications

(15 citation statements)

References 26 publications

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“…The comfort properties of a sock depend on its ability to transmit water (sweat) and vapor from the body to prevent accumulation of liquid on the skin. 25…”

Section: Breathabilitymentioning

confidence: 99%

Performance analysis of socks produced by auxetic yarns for protective applications

Khalid

Jamshaid

Mishra

et al. 2022

Journal of Industrial Textiles

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The present work reports application of auxetic yarns in development of abrasion resistant socks which can be used for better serviceability without shoes even on rough surfaces. Socks used in the current research were produced by using helical auxetic yarns which consist of different combinations of high performance and conventional materials e.g. Kevlar P-AR (para-aramid), cotton, elastomeric yarn, polyamide (PA6) and polyester with same linear density of 74 Tex. Three different types of fabrics were produced e.g. flat knit, sandwich half terry short and sandwich half terry long. For investigating the auxeticity, all samples were subjected to tensile loading and the resulting change in their thickness was measured. Abrasion resistance and other comfort related properties e.g. air permeability, vertical wicking and absorbency were also evaluated. The influence of different yarn combinations, twist levels and fabric types on abrasion resistance and breathability of socks were investigated by using fractional (half) factorial design. Statistical analysis was performed for the obtained results by using analysis of variance. Conventional socks samples were also produced in all fabric types for comparison with the auxetic materials. From the results it was concluded that the overall abrasion resistance of auxetic yarn-based sock is higher than conventional cotton sock. Results also revealed that abrasion resistance was increased by 46% in flat knit socks sample, 50% in sandwich half terry short sample and 58% in sandwich half terry long sample as compared to conventional cotton sock. In addition to this all the socks samples exhibited good comfort/breathability properties.

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“…The comfort properties of a sock depend on its ability to transmit water (sweat) and vapor from the body to prevent accumulation of liquid on the skin. 25…”

Section: Breathabilitymentioning

confidence: 99%

Performance analysis of socks produced by auxetic yarns for protective applications

Khalid

Jamshaid

Mishra

et al. 2022

Journal of Industrial Textiles

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“…The auxetic and conventional planes of the semi-auxetic yarn [38] Figure 9. The auxetic and conventional planes of the semi-auxetic yarn [38] Since helical auxetic yarns have a high capacity for augmenting the auxetic impact of fabric, their structure may be considered as the most suitable for conducting research [21]. Most of auxetic woven fabrics has been developed by employing helical auxetic yarns and following a regular interlacement pattern, either as warp or as weft [39].…”

Section: Fundamentals Of Auxetic Yarnsmentioning

confidence: 99%

“…Thus, the structure made of the auxetic yarn is suitable for acoustic and impact absorption applications [23]. Furthermore, fabric produced from the auxetic yarn increases the mechanical properties [21]. According to Lim, the semi-auxetic yarn could be used to weave a semi-auxetic fabric.…”

Section: Fields Of Applicationmentioning

confidence: 99%

“…This category of materials is often highly fracture resistant; when force is applied, they extend laterally, reducing the development of any possible cracks in the material [20]. The advancement of auxetic yarns has a significant effect on improving the performance of textile materials in general [21]. Auxetic yarns may be used to make fabrics without the need to learn new fabrication techniques [22].…”

Section: Introductionmentioning

confidence: 99%

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Auxetic Yarn: Fundamentals, Influencing Parameters, Application Areas and Challenges

Khan¹,

Siddique²,

Begum³

2021

TLR

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The mechanical behaviour of auxetic materials and structures is the most distinctive characteristic, which differs from that of conventional engineering materials due to the negative Poisson’s ratio. Auxetic materials have the fascinating feature of widening when stretched and contracting when compressed. In recent times, the research of auxetic materials based on textile structures has received a lot of interest. Auxetic effect development at the yarn phase is a new and exciting field of study. Many researchers already developed different types of auxetic yarns, such as the helical auxetic yarn, the plied auxetic yarn, the semi-auxetic yarn etc. The helical auxetic yarn (HAY) is the most commonly mentioned auxetic yarn. It is made up of a rigid wrap and an elastic core yarn. However, it is interesting that auxetic yarns can be produced from conventional non-auxetic fibres through the conventional spinning system as well. The helical auxetic yarn is a new type of yarn with a wide variety of possible applications. Moreover, pore-opening characteristics of auxetic yarns make it a potential candidate in the fields of technical textiles, such as medical textiles, filter application, protective textiles etc. Fabrication of auxetic textiles by utilizing auxetic yarns through simple weaving and knitting technology opens the door to new applications. The aim of this paper is to address the fundamentals of auxetic yarns, such as structure, shortcomings, production techniques, as well as the influencing process parameters. From various research works, it is evident that the wrap helical angle, the core/wrap diameter ratio, and the initial moduli of wrap component are the most vital processing parameters during the production of auxetic yarns. Finally, some potential application areas and challenges of auxetic yarns are also addressed briefly in this paper.

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“…multifilament Polypropylene), and obtained maximum auxetic effect by varying wrap to core angle at 8°. Similarly, Ullah et al, 8 developed HAY by using a combination of high-performance fibres and conventional fibres and studied the effect of different levels of twist per metre. It was observed that the core filament of HAY increased its thickness in transverse direction under stress with considerable NPR, and its values indicated that the auxeticity had a direct relation with core filament thickness or diameter and inversely proportional to the linear density of wrap filament, in case of the wrap angle the auxeticity of HAY yarn had an inverse effect with wrap angle.…”

Section: Introductionmentioning

confidence: 99%

Investigating the influence of the core material on the mechanical performance of a nitinol wire wrapped helical auxetic yarn

Faisal

Fowlie

Connell

et al. 2021

The Journal of Strain Analysis for Engineering Design

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Helical Auxetic Yarns (HAYs) can be used in a variety of applications from healthcare to blast and impact resistance. This work focuses on the effect of the use of different core materials (e.g. rubber, polyurethane, polytetrafluoroethylene/teflon, polypropylene, polyetheretherketone, polycarbonate, acetal) with a nitinol wire wrap component on the maximum Negative Poisson Ratio (NPR) produced and thus the auxetic performance of Helical Auxetic Yarns (HAYs). From the analytical model, it was found that an acetal core produced the largest NPR when compared to the other six materials. The trend obtained from the experimental tensile tests (validation) correlated closely with the theoretical predictions of the NPR as axial strain was increased. The experimental method presented a maximum NPR at an average axial strain of 0.148 which was close to the strain of 0.155 predicted by theory. However, the maximum experimental NPR was significantly lower than that predicted by the analytical model.

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Development of helical auxetic yarn with negative Poisson’s ratio by combinations of different materials and wrapping angle

Cited by 15 publications

References 26 publications

Performance analysis of socks produced by auxetic yarns for protective applications

Performance analysis of socks produced by auxetic yarns for protective applications

Auxetic Yarn: Fundamentals, Influencing Parameters, Application Areas and Challenges

Investigating the influence of the core material on the mechanical performance of a nitinol wire wrapped helical auxetic yarn

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