Auxetic warp knit textile structures

Alderson, K. L.; Alderson, Andrew; Anand, Subhash; Simkins, V. R.; Nazaré, Shonali; Ravirala, N.

doi:10.1002/pssb.201084216

Cited by 126 publications

(110 citation statements)

References 26 publications

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“…Since then, many works have achieved the NPR through structural engineering or via composite structures. [3][4][5][6][7][8][9][10][11][12][13] Materials with NPR have become known as auxetic, as coined by Evans.…”

mentioning

confidence: 99%

Intrinsic Negative Poisson’s Ratio for Single-Layer Graphene

et al. 2016

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Negative Poisson's ratio (NPR) materials have drawn significant interest because the enhanced toughness, shear resistance and vibration absorption that typically are seen in auxetic materials may enable a range of novel applications. In this work, we report that single-layer graphene exhibits an intrinsic NPR, which is robust and independent of its size and temperature. The NPR arises due to the interplay between two intrinsic deformation pathways (one with positive Poisson's ratio, the other with NPR), which correspond to the bond stretching and angle bending interactions in graphene. We propose an energy-based deformation pathway criteria, which predicts that the pathway with NPR has lower energy and thus becomes the dominant deformation mode when graphene is stretched by a strain above 6%, resulting in the NPR phenomenon.

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mentioning

confidence: 99%

Intrinsic Negative Poisson’s Ratio for Single-Layer Graphene

et al. 2016

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“…Auxetic knitted fabrics developed based on double arrow head structure: Alderson K et al [58] developed auxetic warp knit textile structures using conventional wool yarn, based on triangular and double arrowhead geometries as shown in Figure 18a. The auxetic effect is produced due to hinging as shown in Figure 18a, leading to opening of the network of arrowheads.…”

Section: Auxetic Fabricsmentioning

confidence: 99%

Untitled

2017

JTEFT

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Auxetic textiles are materials which possess negative Poisson's ratio, this implies that in contrast to conventional textile materials if they are stretched in longitudinal direction, a marginal expansion will results in transversal direction. Auxetic textile materials have become a point of focus for many researchers in recent past years. This paper reviews the achievements in the area of auxetic textile materials including fibres, yarns, fabrics and textile reinforcements for composite applications. It is aimed that this review will be helpful for future advancement in the area of auxetic textile materials.

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“…Structures have also been created through the use of three-dimensional (3D) printing technology, where engineered mechanical instabilities produce folding behaviors as the object is compressed [8]. Using origami-like patterns and the self-folding behavior of knits, textiles exhibiting auxetic behavior have been developed [9][10][11][12][13]. However, this area of research would benefit from a deeper understanding of how and why the self-folding mechanisms are created.…”

Section: Introductionmentioning

confidence: 99%

“…However, this area of research would benefit from a deeper understanding of how and why the self-folding mechanisms are created. Discovering methods of controlling and understanding the self-folding mechanisms that occur with knit fabric relaxation would help expand the field of smart textiles, and benefit designs such as drug release [14] or compression bandages by affording smart textiles the ability to transform shape [9,15,16]. Additionally, creating these structures in fabric could capitalize on preexisting production methods with computer-programmed knitting machines that have successfully been used in the garment industry for decades [17].…”

Section: Introductionmentioning

confidence: 99%

Self-Folding Textiles through Manipulation of Knit Stitch Architecture

Knittel

Nicholas

Street

et al. 2015

Fibers

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This research presents a preliminary study on finding predictable methods of controlling the self-folding behaviors of weft knit textiles for use in the development of smart textiles and garment devices, such as those with shape memory, auxetic behavior or transformation abilities. In this work, Shima Seiki SDS-One Apex computer-aided knitting technology, Shima Seiki industrial knitting machines, and the study of paper origami tessellation patterns were used as tools to understand and predict the self-folding abilities of weft knit textiles. A wide range of self-folding weft knit structures was produced, and relationships between the angles and ratios of the knit and purl stitch types were determined. Mechanical testing was used as a means to characterize differences produced by stitch patterns, and to further understand the relationships between angles and folding abilities. By defining a formulaic method for predicting the nature of the folds that occur due to stitch architecture patterns, we can better design self-folding fabrics for smart textile applications.

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Auxetic warp knit textile structures

Cited by 126 publications

References 26 publications

Intrinsic Negative Poisson’s Ratio for Single-Layer Graphene

Intrinsic Negative Poisson’s Ratio for Single-Layer Graphene

Untitled

Self-Folding Textiles through Manipulation of Knit Stitch Architecture

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