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KAVUŞTURAN, YASEMİN

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KAVUŞTURAN

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YASEMİN

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    Publication
    Influence of knitting structure and metal wire amount on electromagnetic shielding effectiveness of knitted fabrics
    (E.u. Printing And Publishing House, 2023-01-01) Vandenbosch, Guy A. E.; Volski, Vladimir; TEZEL, SERKAN; KAVUŞTURAN, YASEMİN; Mühendislik Fakültesi; Tekstil Mühendisliği Bölümü; 0000-0003-4078-8210; C-5123-2013; A-7462-2018
    In this study, the influence of knitting structure and metal wire amount on the electromagnetic shielding effectiveness (EMSE) of knitted fabrics were investigated comparatively. Single jersey, single pique, weft locknit, and cross miss fabrics involving stainless steel or copper wires were produced on a flat knitting machine. In order to measure the EMSE, a free space measurement method was used in an anechoic chamber because of its high reproducibility and accuracy. The variance analysis results of the EMSE values showed that knitting structure, metal wire type, metal wire amount, and incident wave frequency is highly significant. It was observed that fabrics with tuck and miss loop structures had higher EMSE values than single jersey fabrics. Also, single pique fabrics had higher EMSE than single jersey fabrics that contain twice as much metal wire. It indicates that the knitting structure has a great effect on EMSE rather than the amount of the conductive material.
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    Comparison of poisson's ratio measurement methods: The extensometer and the universal tensile testing devices
    (Ege Universitesi, 2021-01-01) Tiritoğlu, Mehmet; Tezel, Serkan; Kavuşturan, Yasemin; TİRİTOĞLU, MEHMET; TEZEL, SERKAN; KAVUŞTURAN, YASEMİN; Mühendislik Fakültesi; Tekstil Mühendisliği Bölümü; 0000-0002-9919-564X; 0000-0002-2316-0782; 0000-0003-4078-8210; C-5123-2013; ABI-8400-2020; A-7462-2018
    Auxetic materials with a negative Poison's ratio (PR) have the potential to meet the demand for different materials, especially technical textiles. Universal Tensile Test (UTT) devices and various experimental setups developed by researchers have been used in PR measurements. This study aims to investigate the PR of knitted fabrics with UTT and extensometer devices comparatively by using the same measurement parameters according to ASTM E132. Knitted fabrics with zigzag and foldable patterns were produced in the study because of their auxetic behaviour. It has been determined that the extensometer device can be used as an alternative to the UTT device for PR measurements. While the PR of foldable fabrics cannot be measured with the UTT device because of the fabrics' folding on themselves, it has been observed that it can be easily measured with the extensometer device thanks to the horizontal axis principle.