On the Poisson's ratios of a woven fabric

Sun, Huiyu; Pan, Ning; Postle, R.

doi:10.1016/j.compstruct.2004.05.017

Cited by 71 publications

(56 citation statements)

References 20 publications

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“…38 Thus, the n s values of cotton and polyurethane used as fabric substrates in this work were measured to be 0.48 and 0.2, respectively. The reported n f of PEDOT:PSS was 0.3532.…”

mentioning

confidence: 99%

Highly conductive PEDOT:PSS treated by sodium dodecyl sulfate for stretchable fabric heaters

et al. 2017

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In this study, the conductivity of poly (3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) was greatly enhanced by using sodium dodecyl sulfate (SDS) without damaging the fabric substrates. We suggest that blending and dipping methods using SDS which is compatible with natural and synthetic fabrics dramatically increase the conductivity of PEDOT:PSS to as high as 1335 S cm À1. Additionally, a highly stretchable fabric heater with high conductivity was successfully fabricated using SDS-modified PEDOT:PSS. The fabric heaters exhibited reversible electrical behaviour with cyclic loading of a tensile strain even larger than 80%. The increase in resistance with the tensile strain was significantly smaller than the calculated value for a rigid substrate because the fabrics with a weave structure exhibited interfibrillar contact effects with strain. For example, the resistance was increased by a factor of only 2.62 with 80% strain. The Joule heating behaviours of the fabric heaters were demonstrated at several different applied voltages and ambient temperatures, and the heat capacity and convective heat transfer coefficient were 2 J K À1 and 30 W m À2 K À1 , respectively. The results demonstrated that the method suggested in this work is not only efficient for greatly improving the conductivity but also simple and cost-effective for fabricating highly conductive and stretchable fabrics with various e-textile applications.

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“…38 Thus, the n s values of cotton and polyurethane used as fabric substrates in this work were measured to be 0.48 and 0.2, respectively. The reported n f of PEDOT:PSS was 0.3532.…”

mentioning

confidence: 99%

Highly conductive PEDOT:PSS treated by sodium dodecyl sulfate for stretchable fabric heaters

et al. 2017

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“…Three imbricated scales of the woven structure can indeed be identified: the microscopic scale (scale of the yarn), the macroscopic scale of the woven structure, and an intermediate scale of a few intertwined yarns, which defines the unit cell reproducing the whole structure by a periodic translation, called the mesoscopic scale. Very few works in the literature are devoted to the quantitative evaluation of the Poisson coefficient of textiles, see [2] and the complete list of references therein; on the other hand, it is difficult to develop reliable measurements protocols.…”

Section: Introductionmentioning

confidence: 99%

“…The recent contribution [2] is an important reference, considering modelling approaches based on a geometrical description of the yarn within a unit cell. The effects of mechanical properties of yarns and structural parameters of fabrics on the Poisson's ratio of a woven fabric are investigated.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Poisson’s ratio of textiles from mesoscopic models

Boubaker

Assidi²,

Ganghoffer³

2010

Int J Mater Form

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The magnitudes of Poisson's ratios can attain some peculiar values for woven fabrics, in contrast to conventional engineering materials, leading to unusual stress-strain relationships. A mesoscopic discrete model of dry fabric has been presently developed at the scale of the armor, accounting for the yarn-yarn interactions at the yarns crossing points. From a mechanical viewpoint, yarns are modeled as elastic straight bar elements representing stretching springs connected at frictionless hinges by rotational springs. The motion of each node along the yarn is described by a lateral displacement and a local rotation. The reaction force exerted by the transverse yarns at the contact points is calculated from Timoshenko theory, and the work of the reaction forces is incorporated into the structure potential energy. The equilibrium shape of textile structures submitted to external loading is identified as configurations achieving the minimum of the potential energy; a genetic search algorithm has been implemented for the determination of the global minimum of the total potential energy. The transverse behavior of plain weave fabric is evaluated in terms of the Poisson's ratio, based on virtual simulations at the mesoscopic scale of analysis. Poisson's ratio first increases towards a maximum due to the rapid shrinkage of the sample in the transverse direction, and decreases thereafter when the crimp changes are exhausted, with yarn extension as the main deformation mechanism. The influence of the mechanical properties of both warp and weft on Poisson's coefficient is assessed. Scaling laws of the equivalent elastic properties of plain weave versus characteristic geometrical parameters (as the pick spacing) of the plain weave armor are determined. The predictions of the mesoscopic models provide a guideline for the design of woven fabrics..

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“…Poisson's ratio, a measure of the Poisson effect, is the ratio of the relative contraction strain to the related extension strain in the direction of the applied load [28].…”

Section: Uniaxial Contractionmentioning

confidence: 99%

Experimental Analysis of the Tensile Properties of Painting Canvas

Penava

Tkalec

2016

Autex Research Journal

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In this paper, the practical application of uniaxial testing of painting canvas for determining its mechanical properties is presented. Painting canvases have a complex composite structure whose mechanical properties are considerably improved in relation with the initial basic material. Painting canvas or coated fabrics are obtained by applying a certain number of coatings to raw fabrics. Experimental testing and determining mechanical properties of painting canvas under tensile force at different angles in relation to the weft direction are discussed in the paper. The fabrics were tested before coating, as well as after one, two and three coatings. The values of tensile force in relation to relative extension of coated textiles were measured, as well as breaking force values, elongation at break, contraction at break, work to rupture. Based on the experimentally obtained values, modulus of elasticity, Poisson’s ratio and the level of anisotropy of the coated textile materials were calculated. The experimental results demonstrate the applicability of theoretical formulae. The number of coated layers on the raw fabric exerts a significant impact on the Poisson’s ratio. The values of breaking force, elongation at break, work to rupture and modulus of elasticity increase with an increase in the number of coated layers, and at the same time coefficient of anisotropy decrease. It has been shown that by increasing the number of coated layers in a coated material, its anisotropic properties decrease, while isotropic properties increase. With an increase in the number of coatings, the differences between experimental and theoretical values of modulus of elasticity decrease.

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On the Poisson's ratios of a woven fabric

Cited by 71 publications

References 20 publications

Highly conductive PEDOT:PSS treated by sodium dodecyl sulfate for stretchable fabric heaters

Highly conductive PEDOT:PSS treated by sodium dodecyl sulfate for stretchable fabric heaters

Evaluation of Poisson’s ratio of textiles from mesoscopic models

Experimental Analysis of the Tensile Properties of Painting Canvas

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