Impact of recent developments in fabrication of auxetic materials on safety and protection in sport

Nallavan, G.

doi:10.1063/5.0024805

Cited by 8 publications

(5 citation statements)

References 56 publications

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“…Within this context, FEA has been employed to investigate the effects of unit-cell geometry and Poisson's ratio on mechanical properties in auxetic structures and plates. Additionally, FEA has been utilised to analyse the potential of auxetic constituents in composite materials, as demonstrated in the comparison between FEA and experimental analysis (Figure 9d) [286,287].…”

Section: Design Of Productsmentioning

confidence: 99%

Auxetics and FEA: Modern Materials Driven by Modern Simulation Methods

Galea Mifsud,

Muscat,

Grima-Cornish

et al. 2024

Materials

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Auxetics are materials, metamaterials or structures which expand laterally in at least one cross-sectional plane when uniaxially stretched, that is, have a negative Poisson’s ratio. Over these last decades, these systems have been studied through various methods, including simulations through finite elements analysis (FEA). This simulation tool is playing an increasingly significant role in the study of materials and structures as a result of the availability of more advanced and user-friendly commercially available software and higher computational power at more reachable costs. This review shows how, in the last three decades, FEA proved to be an essential key tool for studying auxetics, their properties, potential uses and applications. It focuses on the use of FEA in recent years for the design and optimisation of auxetic systems, for the simulation of how they behave when subjected to uniaxial stretching or compression, typically with a focus on identifying the deformation mechanism which leads to auxetic behaviour, and/or, for the simulation of their characteristics and behaviour under different circumstances such as impacts.

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Section: Design Of Productsmentioning

confidence: 99%

Auxetics and FEA: Modern Materials Driven by Modern Simulation Methods

Galea Mifsud,

Muscat,

Grima-Cornish

et al. 2024

Materials

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“…The pitch is used in the production processes to ensure that the proper yarn geometry is achieved precisely [9]. The auxetic yarn is known as the double helix yarn (DHY) and also the helical auxetic yarn in the literature [22]. However, Miller et al developed the double helix auxetic yarn with a greater auxetic effect (NPR = -2.1).…”

Section: Fundamentals Of Auxetic Yarnsmentioning

confidence: 99%

“…The auxetic yarn is known as the double helix yarn (DHY) and also the helical auxetic yarn in the literature [22]. However, the HAY have certain inherent structural shortcomings.…”

Section: Fundamentals Of Auxetic Yarnsmentioning

confidence: 99%

“…The auxetic yarn is known as the double helix yarn (DHY) and also the helical auxetic yarn in the literature [22]. However, Miller et al developed the double helix auxetic yarn with a greater auxetic effect (NPR = -2.1).…”

Section: Fundamentals Of Auxetic Yarnsmentioning

confidence: 99%

“…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]. The NPR effect can be achieved by simply weaving or knitting patterns to fabricate auxetic textiles by utilizing auxetic yarns [2].…”

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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Auxetic Materials for Personal Protection: A Review

Tahir

Zhang

2022

Physica Status Solidi (b)

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Life‐changing illnesses and fatalities caused by inefficient personal protective clothing and equipment are increasing day by day. The discrepancy between the test standards, environmental conditions, and infield collision is the reason why personal protection equipment and clothing have not yet decreased the number of injuries in various fields such as military and sports. To further increase the efficiency of personal protection materials, auxetic materials are suggested because of their high energy absorption, good permeability, form‐fitting ability, and high indentation resistance. Auxetic materials are nonconventional materials with a negative Poisson's ratio and can shrink under compression and expand when subjected to stretching. In comparison to nonauxetic conventional materials, auxetic materials have improved properties that can be useful for personal protection applications. This review focuses on the importance of auxetic materials for personal protection, focusing on reducing the chances of injury and what possible ideas can further benefit the protection products. The first part of the review discusses the auxetic structures and their protection applications followed by the fabrication of auxetic structures. The review will conclude with limitations, economic prospects, and what possible work can further improve the potential use of auxetic materials in personal protection.

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Impact of recent developments in fabrication of auxetic materials on safety and protection in sport

Cited by 8 publications

References 56 publications

Auxetics and FEA: Modern Materials Driven by Modern Simulation Methods

Auxetics and FEA: Modern Materials Driven by Modern Simulation Methods

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

Auxetic Materials for Personal Protection: A Review

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