20.500.12556/DKUM-57133 Analiza mehanskih lastnosti tehničnih tkanin za ojačitev kompozitov Mechanical properties analysis of technical woven fabrics used for composite reinforcement V diplomskem delu sem analizirala mehanske lastnosti različnih konstrukcij steklenih in bazaltnih tkanin, ki se uporabljajo za ojačitev polimernih kompozitov. Tkanine so bile vzete iz proizvodnega programa podjetja Kelteks d.o.o., ki je tudi zainteresirano za analizo mehanskih lastnosti teh tehničnih tkanin. Tkanine so se med seboj poleg surovinske sestave razlikovale še po vezavi, finosti niti, gostoti osnovnih oz. votkovnih niti ter posledično ploskovni masi. Namen naloge je bil: 1. ugotoviti, katera konstrukcija tkanin daje najboljše rezultate glede na njihovo uporabnost za ojačitev kompozitov oz. ima optimalne vrednosti pretržne sile in raztezka; 2. ugotoviti ali imajo posamezni konstrukcijski parametri tkanin (surovinska sestava uporabljenih niti, vezava, finost niti, gostota osnovnih oz. votkovnih niti, ploskovna masa) in pogoji merjenja (smer nateznega preskusa, relativna vlažnost v prostoru) statistično pomemben vpliv na njihove natezne lastnosti, in če ga imajo, kakšen je ta vpliv; 3. ugotoviti izkoriščenost mehanskih lastnosti prej v traku niti in traku gotove tkanine. V nalogi sem prišla do naslednjih zaključkov: 1. bazaltna tkanina v keper vezavi in ploskovno maso 300 g/m2 ima največjo pretržno napetost in se pri tem najmanj deformira; 2. smer obremenitve in relativna vlažnost v prostoru imata statistično pomemben vpliv na pretržno silo, medtem ko imajo na pretržni raztezek statistično pomemben vpliv surovinska sestava, finost niti, ploskovna masa in gostota niti; 3. izkoriščenost trdnosti prej v traku preje oz. v tkanini ni 100%. Odstotek izkoriščenosti preje v traku niti je znašal 42,3% – 82,2% ter pri tkanini 22% – 58%. Mechanical properties of different glass and basalt fabric constructions, which are used for the reinforcement of polymer composites. Fabrics were taken from the production program of Kelteks d.o.o., which was also interested in the analysis of the mechanical properties of these technical fabrics. Fabrics were varied, not only according the raw material composition, but also according the type of weave, thread fineness, density of warp and weft threads and consequently also according the surface weight. The purpose of the diploma work was: 1. to determine which construction of fabrics gives the best results according to their usage for composite reinforcement or has the optimum values of breaking force and elongation; 2. to determine whether individual fabric construction parameters (raw material composition of used threads, typ of weave, thread fineness, the density of warp and weft threads, surface weight) and measuring conditions (tensile test direction, relative humidity of the room) have statistically important influence on their tensile characteristics; if yes, what is that influence; 3. to determine utilization of the mechanical properties of the yarn in the tape of thread and the tape of finished fabric. Following conclusions were found: basalt fabric in a twill weave with surface weight of 300 g/m2 has a maximum breaking force and undergoes the least deformation; 2. tensile direction and relative humidity of the room have statistically important influence on breaking force, while raw material composition, thread fineness, surface weight and thread density have an important influence on elongation; 3. the utilization of the yarn strength in in the yarn tape or fabric is not equal 100%. The utilization percentage of yarn in thread tape was 42,3% – 82,2% and with fabric 22% – 58%. mehanske lastnosti konstrukcijski parametri tkanina kompoziti tehnične tekstilije mechanical properties structural parameters fabric composites technical textiles true true false [M. Pivac] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2016-01-18 18:33:40 2016-02-19 14:51:26 2022-06-13 03:06:04 2021-05-15 03:41:09 2016 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 677.076.017.4(043.2) 19434518 URN:SI:UM:DK:0YOYRUNV UN_Pivac_Mirna_2016.pdf UN_Pivac_Mirna_2016.pdf 1 0FAF933B90B9CF28FB22F3555FB9A0A8 ca4f38bb0fe83889913593770fe39eb90b7e6e95910ec7b325651812a2cfbd67 e35480ed-7c0b-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=85855 Fakulteta za strojništvo 0 0 0