A new method for determination of Poisson’s ratio of woven fabric at higher stresses

Brnada, Snježana; Šomođi, Željko; Kovačević, Stana

doi:10.1177/1558925019856225

Cited by 11 publications

(5 citation statements)

References 9 publications

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“…With technological development, as well as the invention of man-made fibers, the development of protective fabrics has changed significantly, affecting their manufacturing for targeted applications [1][2][3]. The requirements placed on textile materials for high-temperature protective clothing have led to innovations in the development and production of woven fabrics [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Influence of Fabric Weave on Thermal Radiation Resistance and Water Vapor Permeability

Kiš¹,

Brnada

Kovačević

2020

Polymers

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In this work, aramid fibers were used to develop new, high-performance fabrics for high-temperature protective clothing. The research was based on the impact of the weave structure on fabric resistance to radiant heat. The goals of the research were primarily related to the development of new fabric structures created by the weave structure, which gives better protection of the body against high temperatures in relation to the standard weave structures that are used today. According to the results obtained it can be concluded that the fabric weave significantly affects the fabric structure, which consequently determines the effectiveness of protection against high temperatures. The justification for the use of multi-weft and strucks weave structure, which provides greater thermal protection and satisfactory breathability than commonly used weave structures, was ascertained.

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Section: Introductionmentioning

confidence: 99%

Influence of Fabric Weave on Thermal Radiation Resistance and Water Vapor Permeability

Kiš¹,

Brnada

Kovačević

2020

Polymers

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“…However, the available laboratory tests did not allow for determination of the two last parameters in a simple way. As, in fact, they do not influence the final results significantly, the Poisson’s ratio and Shear modulus were assumed based on the literature regarding other nylon fabrics with similar characteristics [ 26 , 27 ].…”

Section: Resultsmentioning

confidence: 99%

Experimental and Numerical Determination of Strength Characteristics Related to Paraglider Wing with Fourier Transform Infrared Spectroscopy of Applied Materials

et al. 2022

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The aim of paper is to determine experimentally and numerically the strength characteristics related to the paraglider wing with Fourier transform infrared spectroscopy of applied materials. The applied method consists in theoretical modeling supplemented by the tests of material parameters. First, the set of 10 lightweight fabrics was selected for the tests; the samples are representative for these structures. The materials were tested using the spectroscopy to determine the FTIR spectra. The samples differ in the content of certain characteristic groups. Air permeability change of the materials was determined for the different pressure drops. The air permeability of almost all the analyzed samples was close to zero with the exception of only one material. The tensile strength and elongation at the break of samples were determined on the testing machine. The paraglider samples were characterized by slightly decreased mechanical properties compared to the parachute fabrics. The material characteristics determined during the tests are the input data for the theoretical analysis. The numerical model of the paraglider wing is based on a 3D geometry from previous research, but the stress, strain, and deformation were determined using the ANSYS Structural program and the finite elements method. To determine the strength correctly, we introduce two basic values: the absolute maximal and the representative values that are the biggest repetitive values of stress, strain, and deformation. The stress value was determined by the main factors: (i) the thinner the material, the bigger the stresses that were accumulated; (ii) the stronger the material, the bigger the stresses that were accumulated. The results are similar for all materials and differ mainly by the values. The biggest stresses were observed inside the material contacting the ribs, whereas the biggest deformation and strain were in the regions between ribs, and the smallest were in the contact areas with the fixed supports. Their highest intensity was observed on the leading edge of the paraglider. We conclude that the obtained stresses were far from the breaking level for the wing.

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“…But in non-homogeneous materials, u > 0.5 can be observed due to their unusual structure. [60]. Figure 13(e) evinces that Poisson's ratio increases with Ca doping but random change is noted with Mg and Sr doping.…”

Section: Shear Modulus (G)mentioning

confidence: 90%

Computational investigation to explore the effects of metals (Mg, Ca, Sr) doping on phase transition, electronic band structure and their repercussions on optical, elastic and mechanical properties of BaThO₃

Gillani¹,

Awais²,

Atif³

et al. 2022

Phys. Scr.

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The effect of metals (Mg, Ca, Sr) doping concentration on phase transition, electronic band structure, and their repercussions on the optical, elastic, and mechanical properties of BaThO3 is presented. At 1.40% doping of Mg, Ca, and Sr-atom, the structure of BaThO3 remains cubic. However, it changes from cubic to a pseudo-cubic tetragonal phase at doping concentrations of 4.22% and 7.04%. A systematic substantial shrinking of the band gap is observed in all cases of doping, and its nature remains direct on the G-symmetry point. The reduction in the band gap is explained by the total density of states (TDOS), partial density of states (PDOS), and elemental partial density of states (EPDOS) in the line of phase transformation. The optical response of a doped compound shows a red shift in the absorption edge, whereas the refractive index increases from 2.067-2.227 with Mg-doping and slightly decreases with Ca and Sr doping. For cubic and tetragonal symmetry, the computed elastic constants follow the mechanical stability criteria for each doping concentration, except at 7.04%Ca doping. Furthermore, the bulk modulus (B), shear modulus (G), Young’s modulus (E), Poisson’s ratio, and anisotropic factor (A) is estimated by utilizing elastic parameters. The B/G value is also determined to assess the ductile/brittle character of pure and doped compounds. Moreover, at 4.22%Ca, 7.04%Ca, and 4.22%Mg doping, non- homogeneity is observed due to negative stiffness and very high values of Poisson’s ratio. The modification in structural, electronic, optical, elastic, and mechanical properties with Ca, Mg, and Sr-doping would make them an appropriate candidate for better optimization in UV filters due to the existence of their absorption spectra in the UV region.

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A new method for determination of Poisson’s ratio of woven fabric at higher stresses

Cited by 11 publications

References 9 publications

Influence of Fabric Weave on Thermal Radiation Resistance and Water Vapor Permeability

Influence of Fabric Weave on Thermal Radiation Resistance and Water Vapor Permeability

Experimental and Numerical Determination of Strength Characteristics Related to Paraglider Wing with Fourier Transform Infrared Spectroscopy of Applied Materials

Computational investigation to explore the effects of metals (Mg, Ca, Sr) doping on phase transition, electronic band structure and their repercussions on optical, elastic and mechanical properties of BaThO₃

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A new method for determination of Poisson’s ratio of woven fabric at higher stresses

Cited by 11 publications

References 9 publications

Influence of Fabric Weave on Thermal Radiation Resistance and Water Vapor Permeability

Influence of Fabric Weave on Thermal Radiation Resistance and Water Vapor Permeability

Experimental and Numerical Determination of Strength Characteristics Related to Paraglider Wing with Fourier Transform Infrared Spectroscopy of Applied Materials

Computational investigation to explore the effects of metals (Mg, Ca, Sr) doping on phase transition, electronic band structure and their repercussions on optical, elastic and mechanical properties of BaThO3

Contact Info

Product

Resources

About

Computational investigation to explore the effects of metals (Mg, Ca, Sr) doping on phase transition, electronic band structure and their repercussions on optical, elastic and mechanical properties of BaThO₃