A novel plied yarn structure with negative Poisson’s ratio

Ge, Zhaoyang; Hu, Hong; Liu, Shirui

doi:10.1080/00405000.2015.1049069

Cited by 59 publications

(70 citation statements)

References 30 publications

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“…In this review we refer to this yarn as the DHY. Development of the DHY includes an auxetic plied yarn [212], auxetic braided structure [160], and a DHY where the 'wrap' fibre is stitched in place to offer more control over its behaviour by preventing fibre slippage [213]. Heat treatment has also been utilised to solve the issue of slippage [214].…”

Section: Fabricating Auxetic Textilesmentioning

confidence: 99%

Review of Auxetic Materials for Sports Applications: Expanding Options in Comfort and Protection

Duncan

Shepherd

Moroney³

et al. 2018

Applied Sciences

228

151

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Following high profile, life changing long term mental illnesses and fatalities in sports such as skiing, cricket and American football-sports injuries feature regularly in national and international news. A mismatch between equipment certification tests, user expectations and infield falls and collisions is thought to affect risk perception, increasing the prevalence and severity of injuries. Auxetic foams, structures and textiles have been suggested for application to sporting goods, particularly protective equipment, due to their unique form-fitting deformation and curvature, high energy absorption and high indentation resistance. The purpose of this critical review is to communicate how auxetics could be useful to sports equipment (with a focus on injury prevention), and clearly lay out the steps required to realise their expected benefits. Initial overviews of auxetic materials and sporting protective equipment are followed by a description of common auxetic materials and structures, and how to produce them in foams, textiles and Additively Manufactured structures. Beneficial characteristics, limitations and commercial prospects are discussed, leading to a consideration of possible further work required to realise potential uses (such as in personal protective equipment and highly conformable garments).

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Section: Fabricating Auxetic Textilesmentioning

confidence: 99%

Review of Auxetic Materials for Sports Applications: Expanding Options in Comfort and Protection

Duncan

Shepherd

Moroney³

et al. 2018

Applied Sciences

228

151

View full text Add to dashboard Cite

show abstract

“…Studies of HAY were predominantly focused on DHY, until recently, Ge et al has developed a new approach to produce negative Poisson's ratio in yarn with a specific 4‐ply structure . The work of Ge et al included a geometric analysis to calculate the Poisson's ratio values of the auxetic plied yarn for any given tensile strain, and the experimental result revealed that the geometrical model was only capable of predicting the Poisson's ratio at high strains.…”

Section: Introductionmentioning

confidence: 99%

Tensile and Deformation Behavior of Auxetic Plied Yarns

2017

Physica Status Solidi (b)

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This paper presents an experimental study of tensile and deformation behavior of an auxetic plied yarn structure. The basic configuration of the plied structure formed with two soft yarns and two stiff yarns was firstly introduced. Based on this 4‐ply helix structure, six kinds of yarn samples were made by different combinations of soft yarns, stiff yarns and twist levels. These yarn samples were first tested and the effects of different design parameters were analyzed. Apart from the tensile test, changes in the internal structure of two samples upon stretching were also studied through microscopic examination. Finally, double helix yarn and 6‐ply auxetic yarn were made for a comparative purpose to investigate the effect of helical structure. The study shows that all of the 4‐ply auxetic yarn samples exhibit negative Poisson's ratio (NPR) throughout the entire tensile process, and the magnitude of NPR gets larger with a smaller soft yarn diameter, a higher tensile modulus of stiff yarn and a lower twist level. The study also shows that auxetic behavior inside the 4‐ply structure is generated by the interplay between the soft yarns and stiff yarns and 4‐ply auxetic yarns have the advantages to produce immediate auxetic effect upon stretching.

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“…These properties include shear modulus, energy absorbance, vibration damping, [5][6][7][8][9] sound absorption, [10] indentation resistance, [11][12][13] and synclastic behavior for better formability. [14] The known naturally and manmade auxetic materials include metals, [15] laminates, [16] gels, [17] crystalline structures, [18][19][20] polymers, [21,22] composites, [6,8,23] foams, [1,24] and textile materials including fibers, [22,25] yarns, [26][27][28][29][30] and fabrics including woven fabrics, [26,27,[31][32][33][34][35][36][37] weft-knitted fabrics, [38][39][40][41][42][43] warp-knitted fabrics, [44][45][46]…”

Section: Introductionmentioning

confidence: 99%

Single‐ and Double‐Layered Bistretch Auxetic Woven Fabrics Made of Nonauxetic Yarns Based on Foldable Geometries

Zulifqar

Hua

2019

Physica Status Solidi (b)

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Auxetic fabrics made of nonauxetic yarns have gained increasing interest of textile scientists. Most recently, single-layered bistretch auxetic woven fabrics made of nonauxetic yarns based on parallel in-phase zigzag foldable geometry have been reported to have auxetic behavior when stretched along both principal directions. It is also reported that this geometry can possibly be realized into double-layered woven fabrics. In addition, it is suggested that the phenomenon of differential shrinkage can be exploited to realize another variation of foldable geometry such as out-of-phase zigzag foldable structures into woven fabrics. Therefore, herein, two possibilities aimed to be explored are double-layered auxetic woven fabric based on parallel in-phase zigzag foldable geometry and single-layered fabrics based on out-of-phase zigzag foldable geometry that are developed using the phenomenon of differential shrinkage to realize these geometries into the woven fabric structures. Five different auxetic woven fabric samples are fabricated using elastic and nonelastic yarns on a conventional weaving machine and tested along two principal directions. The testing results show that all the developed fabrics have auxetic behavior in both principal directions, and the placement of weaves and weft yarn arrangements has an obvious effect.

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A novel plied yarn structure with negative Poisson’s ratio

Cited by 59 publications

References 30 publications

Review of Auxetic Materials for Sports Applications: Expanding Options in Comfort and Protection

Review of Auxetic Materials for Sports Applications: Expanding Options in Comfort and Protection

Tensile and Deformation Behavior of Auxetic Plied Yarns

Single‐ and Double‐Layered Bistretch Auxetic Woven Fabrics Made of Nonauxetic Yarns Based on Foldable Geometries

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