Person: SÜVARİ, FATİH
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SÜVARİ
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FATİH
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Publication New measurement and evaluation methods of seam puckering(Univ Zagreb, Fac Textile Tech, 2008-01-01) Dragcevic, Z; Süvari, Fatih; SÜVARİ, FATİH; Meriç, Binnaz; Mühendislik Fakültesi; Tektil Mühendisliği Bölümü; Dragcevic, Z; 0000-0001-5708-7993; 0000-0002-1296-9092; N-1770-2019; AAD-9210-2019Seam puckering is known as the most serious and frequently encountered problem in garment manufacturing industry. In this study objective measurement and assessment methods of seam puckering were presented. The need of reliable measuring and evaluating methods as alternatives to existing visual assessments were mentioned. Effects of stitch yam, fabric and sewing machine parameters on formation of seam puckering were explained. The reasons of seam puckering formation were discussed. The necessity of quality control process for sewn fabric was explained. Devices which have been developed in order to acquire information from the wrinkled stitch line and the methods which have been used in order to assess puckering degree according to the necessity were summarized. Generated results of measuring systems that are consistent with standard subjective degrees were mentioned.Publication Evaluation of enset fabric reinforced green composite as sound absorber structure(Ege Universitesi, 2021-04-01) Temesgen, Alhayat Getu; Eren, Recep; Aykut, Yakup; Süvari, Fatih; Temesgen, Alhayat Getu; EREN, RECEP; AYKUT, YAKUP; SÜVARİ, FATİH; Bursa Uludağ Üniversitesi, Mühendislik Fakültesi, Tekstil Mühendisliği Bölümü; Tekstil Mühendisliği Bölümü; 0000-0001-5708-7993; 0000-0002-5263-1985; 0000-0001-9389-0281; 0000-0001-7841-2281; JDH-9222-2023; CPO-1051-2022; JTV-2018-2023; N-1770-2019Noise is a problem that should be reduced in a variety of places. Fibrous structures are some of the most commonly used materials for sound absorption applications. Enset fibers have a limited use in technical textile applications especially in packaging sector and are mostly left as an agro waste materials. The aim of this research work was to investigate the acoustic property of this new alternative natural fiber (fabric) and its green composite material. The sound absorption performance of enset fabric and its green composite was determined with impedance tube method. The porosity and void structure of enset fibers were studied by scanning electron microscope (SEM) for analysis of enset fabric and enset fabric reinforced composite sound dissipation mechanism. The sound absorption coefficient of enset fabric could only reach to 0.5 level with 5 layers of enset fabric after 3500 Hz frequency. Composite structures with increasing number of fabric layers decreased sound absorption frequency interval. With 5 layers composite (5 fabric layers in the composite), a sound absorption coefficient remained over 0.5 at a large frequency interval between 2830 and 6000 Hz while it was reaching to 0.9 at around 2500 Hz frequency. Increasing the ratio of bio resin to enset fabric caused the sound absorption behavior of composite material tend to shift from higher to medium frequency regions.Publication Investigating the effect of raising on the sound absorption behavior of polyester woven fabrics(Sage, 2019-12-01) Süvari, Fatih; Dülek, Yasemin; SÜVARİ, FATİH; Dülek, Yasemin; Mühendislik Fakültesi; Tekstil Mühendisliği Bölümü; 0000-0001-5708-7993; N-1770-2019; EUK-3249-2022This work presents the results of efforts focused on the development of sound absorptive woven fabrics by the raising process. Four woven fabrics with rib and basket weave patterns were produced for the raising process. Micro-fiber-based polyester weft yarns were used in one set of rib and basket weave fabrics, while weft yarns comprising regular polyester fibers were used in the other set. Fabrics were subjected to dyeing and heat setting prior to the raising process. Fabrics were then passed one to three times through the raising unit in order to obtain fabrics with different voluminous characteristics and different quantities of fiber ends on the fabric surface. The mass per unit area, thickness, air permeability, and sound absorption coefficient of the fabrics were measured and surface images of the fabrics were taken. The solid volume fraction and airflow resistivity of the fabrics decreased significantly after the first and second raising passes. Increasing the number of raising passes up to two passes resulted in higher sound absorption (average increment of 20% at 5 kHz) in the higher frequencies at the expense of that in the lower frequencies. Sound absorption change beyond two passes was insignificant, though. The results demonstrated that raised fabrics having a lower solid volume fraction and airflow resistivity had better acoustical properties in the higher frequency region.Publication Effect of different yarn combinations on auxetic properties of plied yarns(Walter, 2021-10-15) Akgün, Mine; Eren, Recep; Süvari, Fatih; Yurdakul, Tuğba; AKGÜN, MİNE; EREN, RECEP; SÜVARİ, FATİH; Yurdakul, Tuğba; Mühendislik Fakültesi; Tekstil Mühendisliği Bölümü; 0000-0001-5708-7993; N-1770-2019; CBU-3381-2022; CPO-1051-2022; GIA-1705-2022This study presents the effects of a novel plied yarn structure consisting of different yarn components and yarn twist levels on the Poisson's ratio and auxetic behavior of yarns. The plied yarn structures are formed with bulky and soft yarn components (helical plied yarn [HPY], braided yarn, and monofilament latex yarn) and stiff yarn components (such as high tenacity [HT] and polyvinyl chloride [PVC]-coated polyester yarns) to achieve auxetic behavior. Experimental results showed that as the level of yarn twist increased, the Poisson's ratios and the tensile modulus values of the plied yarns decreased, but the elongation values increased. A negative Poisson's ratio (NPR) was obtained in HT-latex and PVC-latex plied yarns with a low twist level. The plied yarns formed with braid-HPY and braid-braid components gave partial NPR under tension. A similar result was achieved for yarns with HT-latex and PVC-latex components. Since partial NPR was seen in novel plied yarns with braided and HPY components, it is concluded that yarns formed with bulky-bulky yarn components could give an auxetic performance under tension.Publication Investigation of the effect of pique weave on auxetic performance and related fabric properties(Taylor, 2021-09-22) Akgün, Mine; Eren, Recep; Süvari, Fatih; Yurdakul, Tuğba; AKGÜN, MİNE; EREN, RECEP; SÜVARİ, FATİH; Yurdakul, Tuğba; Fen Bilimleri Enstitüsü; Tekstil Mühendisliği; 0000-0001-5708-7993; N-1770-2019; CBU-3381-2022; GIA-1705-2022Re-entrant structures are known to perform an auxetic effect. It was aimed in this paper to investigate the Poisson's ratio of the woven pique structures because of the re-entrant lozenge effect of the weave. Sound absorption, air permeability, and synclastic properties of the fabrics concerning the auxetic properties of pique structures were also examined. In evaluating the synclastic behavior, the drape ability and bending rigidity of the fabrics were assessed. Pique weave fabrics were subjected to tensile tests, and the changes in fabric unit cell at different tensile strains were observed in the warp and weft directions. Experimental results showed that the auxetic effect was produced in the warp direction. A high negative Poisson's ratio (NPR) was obtained in cotton pique fabrics under low elongation values. It was observed that the yarn floating lengths and the yarns intersecting region widths forming the re-entrant lozenge pattern had effects on fabrics' NPR.