The Experts below are selected from a list of 11463 Experts worldwide ranked by ideXlab platform
Lukas Vojtech - One of the best experts on this subject based on the ideXlab platform.
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Electromagnetic Shielding Effectiveness of Woven Fabrics with High Electrical Conductivity: Complete Derivation and Verification of Analytical Model
Materials, 2018Co-Authors: Marek Neruda, Lukas VojtechAbstract:In this paper, electromagnetic shielding effectiveness of Woven Fabrics with high electrical conductivity is investigated. Electromagnetic interference-shielding Woven-textile composite materials were developed from a highly electrically conductive blend of polyester and the coated yarns of Au on a polyamide base. A complete analytical model of the electromagnetic shielding effectiveness of the materials with apertures is derived in detail, including foil, material with one aperture, and material with multiple apertures (Fabrics). The derived analytical model is compared for Fabrics with measurement of real samples. The key finding of the research is that the presented analytical model expands the shielding theory and is valid for Woven Fabrics manufactured from mixed and coated yarns with a value of electrical conductivity equal to and/or higher than σ = 244 S/m and an excellent electromagnetic shielding effectiveness value of 25–50 dB at 0.03–1.5 GHz, which makes it a promising candidate for application in electromagnetic interference (EMI) shielding.
Marek Neruda - One of the best experts on this subject based on the ideXlab platform.
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Electromagnetic Shielding Effectiveness of Woven Fabrics with High Electrical Conductivity: Complete Derivation and Verification of Analytical Model
Materials, 2018Co-Authors: Marek Neruda, Lukas VojtechAbstract:In this paper, electromagnetic shielding effectiveness of Woven Fabrics with high electrical conductivity is investigated. Electromagnetic interference-shielding Woven-textile composite materials were developed from a highly electrically conductive blend of polyester and the coated yarns of Au on a polyamide base. A complete analytical model of the electromagnetic shielding effectiveness of the materials with apertures is derived in detail, including foil, material with one aperture, and material with multiple apertures (Fabrics). The derived analytical model is compared for Fabrics with measurement of real samples. The key finding of the research is that the presented analytical model expands the shielding theory and is valid for Woven Fabrics manufactured from mixed and coated yarns with a value of electrical conductivity equal to and/or higher than σ = 244 S/m and an excellent electromagnetic shielding effectiveness value of 25–50 dB at 0.03–1.5 GHz, which makes it a promising candidate for application in electromagnetic interference (EMI) shielding.
P D Gosling - One of the best experts on this subject based on the ideXlab platform.
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direct stress strain representation for coated Woven Fabrics
Computers & Structures, 2004Co-Authors: Ben Bridgens, P D GoslingAbstract:Abstract An understanding of the complex behaviour of coated Woven Fabrics is vital for the design of state-of-the-art fabric structures. Fabric behaviour is typically defined using elastic constants based on plane stress assumptions. This paper considers two new methods of representing fabric response: (i) use of spline functions to define response surfaces, (ii) use of stress–strain mean and difference functions (proposed by Day [IASS symposium proceedings: shells, membranes and space frames 2 (1986) 17]. Both techniques provide direct correlation between stresses and strains, eliminating the assumption of plane stress. Extensive biaxial fabric testing is proposed to assess the validity of these approaches and extend their use.
Ming Wang - One of the best experts on this subject based on the ideXlab platform.
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A facile approach to fabricating silver-coated cotton fiber non-Woven Fabrics for ultrahigh electromagnetic interference shielding
Applied Surface Science, 2018Co-Authors: Yan Jun Tan, Shaoyun Guo, Jiang Li, Jie Li, Yuan Gao, Ming WangAbstract:Electromagnetic radiation pollution has become a serious threat to human health. Wearable materials with high electromagnetic interference (EMI) shielding are highly desirable to protect people far from electromagnetic radiation. In this study, we prepared flexible and wearable materials with ultrahigh EMI shielding via a facile wet electroless deposition of Ag on surface of cotton fibers (Ag@CFs) in non-Woven Fabrics. High conductivity of ∼3333 S/m and excellent EMI shielding effectiveness (SE) of ∼71 dB were achieved by only costing the wet deposition time of 10 s with 1.61 vol% Ag coating layers, which was far more than the requirement for common commercial EMI SE of 30 dB. The EMI SE of the materials could reach ∼111 dB when the Ag plating time was 3 min. The ultrahigh EMI shielding performance was ascribed to cell-like configuration, which is the abundant interfaces and porous structure in the Ag@CFs non-Woven Fabrics, and the voids in Ag layers. The electromagnetic radiation, which was reflected at the interfaces and then absorbed in the composites, was hard to escape from the cell-like configurations. Moreover, the prepared Ag@CFs films could also maintain high EMI SE by suffering dozens of washing times or one thousands of bending times. For example, there were only reduction of a few dB in the EMI SE for the non-Woven Fabrics with the coating time of 3 min after washing 20 times or bending 1000 times. Therefore, this work gave a new strategy for fabricating wearable materials with high-performance EMI shielding.
CamgÖz Berkay - One of the best experts on this subject based on the ideXlab platform.
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Gamma radiation shielding effectiveness of cellular Woven Fabrics
'SAGE Publications', 2018Co-Authors: Özdemir Hakan, CamgÖz BerkayAbstract:WOS: 000418377600009Lead-shielding products, such as lead aprons, are important materials for personal protection of physicians and patients from X-ray (gamma) radiation during medical operations. However, lead has environmental disadvantages such as high toxicity. The aim of this study was to manufacture an environmentally friendly and flexible textile-based radiation shielding material. In this work, 3/1 twill and some cellular Woven Fabrics were produced with conductive core yarns, and gamma radiation shielding effectiveness of these cellular Woven Fabrics were investigated and compared with that of the 3/1 twill Woven fabric, which are commonly used as uniforms and were not studied previously in any other literature. The effects of weave on the structural characteristics of fabric such as the conductive weft yarn density, fabric thickness, and fullness were analyzed graphically and statistically. It is observed that with indenting and protruding, structure cellular Woven Fabrics performed better gamma radiation shielding performance than the 3/1 twill Woven Fabrics. The sample B1, Woven with cellular weave 1, has the highest gamma radiation shielding effectiveness, thanks to the highest fabric thickness. In addition, the increase in the conductive core yarn density improved the gamma radiation shielding effectiveness of the Woven Fabrics
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A RESEARCH ON THE GAMMA RADIATION SHIELDING EFFECTIVENESS OF DICED Woven Fabrics
'Boston College University Libraries', 2018Co-Authors: CamgÖz Berkay, Ozdemhz HakanAbstract:WOS: 000440377600010Lead aprons are used for personal protection of physicians and patients from X-ray (gamma) radiation during medical operations, though lead has environmental disadvantages, with high toxicity. Therefore, the aim of this research was to produce an environmentally friendly and flexible textile-based radiation shielding material. In this work, 1/3 twill and certain diced Woven Fabrics were manufactured with conductive core yarns, and gamma radiation shielding effectiveness of these diced Woven Fabrics were investigated and compared with that of the 1/3 twill Woven fabric, which are commonly used as uniforms and were not studied previously in the literature. The effects of fabric structural characteristics such as weave, fabric thickness, porosity and conductive weft yarn density on these properties were analyzed by the physics of gamma radiation shielding and statistics. Experimental results are compatible with the physics of gamma radiation shielding. It is observed that with indenting and protruding structure diced Woven Fabrics performed better gamma radiation shielding performance than the 1/3 twill Woven Fabrics did. The samples E1 and B1, Woven with diced weave 4 and 1, have the highest gamma radiation shielding effectiveness, thanks to the highest fabric thickness and to the lowest porosity. In addition, the increases of conductive core yarn density improved these gamma radiation shielding effectiveness of Woven Fabrics
