The Poisson Ratio and Modulus of Elastic Knitted Fabrics

Zhou, Jinyun; Li, Yi; Lam, Jimmy; Cao, Xuyong

doi:10.1177/0040517510371864

Cited by 54 publications

(25 citation statements)

References 6 publications

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“…Due to the knitting structure in the fabric, its mechanical properties are intrinsically anisotropic. The Young’s modulus of fabrics ranges from tens of kPa to several MPa and the Poisson ratio is in the range of [0.1, 0.4] [42]. The specific techniques to assemble the antenna with a fabric substrate and conductive fabric radiation part also need to be carefully chosen, as the electrical short or additional loss may occur [17].…”

Section: Insulating and Conducting Fabrics For Textile Antennasmentioning

confidence: 99%

Recent Development of Flexible and Stretchable Antennas for Bio-Integrated Electronics

Zhu

Cheng

2018

Sensors

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Wireless technology plays an important role in data communication and power transmission, which has greatly boosted the development of flexible and stretchable electronics for biomedical applications and beyond. As a key component in wireless technology, flexible and stretchable antennas need to be flexible and stretchable, enabled by the efforts with new materials or novel integration approaches with structural designs. Besides replacing the conventional rigid substrates with textile or elastomeric ones, flexible and stretchable conductive materials also need to be used for the radiation parts, including conductive textiles, liquid metals, elastomeric composites embedding conductive fillers, and stretchable structures from conventional metals. As the microwave performance of the antenna (e.g., resonance frequency, radiation pattern, and radiation efficiency) strongly depend on the mechanical deformations, the new materials and novel structures need to be carefully designed. Despite the rapid progress in the burgeoning field of flexible and stretchable antennas, plenty of challenges, as well as opportunities, still exist to achieve miniaturized antennas with a stable or tunable performance at a low cost for bio-integrated electronics.

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Section: Insulating and Conducting Fabrics For Textile Antennasmentioning

confidence: 99%

Recent Development of Flexible and Stretchable Antennas for Bio-Integrated Electronics

Zhu

Cheng

2018

Sensors

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“…Mechanical properties, particularly strength and elongation, are the most important performance properties of knitted fabrics which governs the fabric performance in use by causing a change of dimensions of strained knitted fabrics [1][2][3]. A change of dimensions of strained knitted fabric can be defined by increasing dimension in one direction as dimension in other directions is decreasing [4,5]. In many cases, it is important to know how much the knit will deform in one or another direction.…”

Section: Introductionmentioning

confidence: 99%

“…References [5,8,9] investigated the effect of knit structures and raw materials on plated knitted fabrics tensile properties and the results showed that the tensile strength and elongation at break of plated single jersey, plated rib 4 : 2, and plated purl knitted fabrics are different due to the variations in physical and chemical properties of cotton, silk, polyester, polyamide, viscose, bamboo, and their blends at different ratio and count. References [10,11] reported that the mechanical property of knitted fabrics is the matter of yarn, fabric structure, and the knitting process and found that tensile property of jacquard weft knitted fabrics is different in birds eye, striped jacquard, and twill jacquard knit structures.…”

Section: Introductionmentioning

confidence: 99%

Tensile Properties of Single Jersey and 1×1 Rib Knitted Fabrics Made from 100% Cotton and Cotton/Lycra Yarns

Sitotaw

Adamu

2017

Journal of Engineering

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The tensile properties such as tensile strength which is measured as breaking force in Newton (N) and elongation percent (%) at break of single jersey and 1×1 rib (knitted with full needles) knitted fabrics made from 100% cotton and cotton/Lycra yarns (5% Lycra yarn content in 95% combed cotton yarn) are investigated in this research. The sample fabrics are conditioned for 24 hours at 20 ± 1 ∘ C temperature and 65 ± 2% relative humidity before testing. Ten specimens (five for lengthwise and five for widthwise) have been taken from each of the two knitted structures, those made from 100% cotton and cotton/Lycra (at 95/5 percent ratio blend) yarns. According to the discussion and as found from the investigations, the tensile properties of single jersey and 1×1 rib knitted fabrics made from 100% cotton and cotton/Lycra yarns are significantly different from each other and both of the knitted fabrics have high elongation percent at break with cotton/Lycra blend yarns as compared to 100% cotton yarn. Knitted fabrics made from cotton/Lycra blended yarn have low breaking force and high elongation percent at break relative to knitted fabrics made from 100% cotton yarns.

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“…Also, the important engineering parameters such as Poisson's ratio and elastic modulus of the coated fabrics were measured. Zhou et al [8] studied elastic modulus and Poisson's ratio of knitted fabrics by uniaxial tensile test and obtained the elastic modulus by using linear regression. Sun et al [9] developed a mechanical model to calculate Poisson's ratio of the woven fabric.…”

Section: Introductionmentioning

confidence: 99%

Tensile characteristics of flexible PU-coated multi-axial warp-knitted fabrics

Jing

Guo

et al. 2016

Journal of Industrial Textiles

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In practice, the coated fabric is available in many shapes and sizes, not just rectangle and plane. In order to increase the shape-shifting abilities of coated fabrics, polyurethanecoated multi-axial warp-knitted fabric (PU-CMWKF) is developed. In this paper, the tensile characteristics of PU-CMWKF were investigated. Five groups of tensile experiments, with off-axial angles of 0 , 22 , 45 , 67.5 , and 90 , were conducted under constant velocity. The failure mechanism was explored by analyzing the damaged specimens. Additionally, the deformation behavior of PU-CMWKF in three regions was investigated by utilizing the digital image correlation (DIC) system, and an orthogonal anisotropic model was used to predict the modulus and Poisson's ratio of 22.5 and 67.5 . Research results showed that the apparent modulus of PU-CMWKF strongly depended on the cut of directions. And the failure mechanism under in-plane direction loading suggests that tensile and shear failure act together. The analytical model is validated along five directions in the representation of elastic constant under corresponding small strain.

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The Poisson Ratio and Modulus of Elastic Knitted Fabrics

Cited by 54 publications

References 6 publications

Recent Development of Flexible and Stretchable Antennas for Bio-Integrated Electronics

Recent Development of Flexible and Stretchable Antennas for Bio-Integrated Electronics

Tensile Properties of Single Jersey and 1×1 Rib Knitted Fabrics Made from 100% Cotton and Cotton/Lycra Yarns

Tensile characteristics of flexible PU-coated multi-axial warp-knitted fabrics

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