1294 KB28 KB199920252014Eksi, OlcayErdogan, Ertugrul Selcukštevilka:3letnik:60str. 195-202, SI 36ISSN:0039-2480COBISSID:13404187URN:URN:NBN:SI:doc-ZZ7HY0DEenZveza strojnih inženirjev in tehnikov Slovenije et al.Strojniški vestnikanalizemetoda geometrijskih elementovnapovedovanje debeline stenpolipropilenpolistirentermoformiranjePrediction of wall thickness distribution in simple thermoforming moulds|Thermoforming is widely used in manufacturing industries to produce large and labour-intensive products. Compared to other manufacturing techniques, thermoforming is an extremely efficient process that is suitable for high-efficiency mass production. In this paper, experimental thermoforming operations were carried out using a lab-scale, sheet-fed thermoformer. Carbon fibre-reinforced PP and unreinforced PS thermoplastic sheets were used in experimental thermoforming operations. The processing parameters were determined for each thermoformed material. Furthermore, a simulation of the thermoforming process was performed using LS-Dyna TM software. The thickness distributions obtained from the experiments were compared with the simulation results. The results show that the parameter that most affects the wall thickness distribution is the geometry of the clamping ring. To produce thermoformed products that have a more uniform thickness distribution, the clamping tool geometry must be selected according to the geometry of the product being thermoformedAnaliza po metodi geometrijskih elementov (GEA) je pristop, ki se še ni uveljavil pri napovedovanju debeline sten delov, ki nastanejo s termoformiranjem. Metoda daje porazdelitev debeline sten le za enostavne komponente, simulacije postopka termoformiranja pa zahtevajo podrobnejši popis spremenljivk procesa in nekatere parametre materiala za pripravo primernega modela po metodi končnih elementov. Simulacija kljub zahtevam daje bolj realistične rezultate kot analiza po metodi geometrijskih elementov. Cilj te študije je primerjava rezultatov analize po metodi geometrijskih elementov, analize po metodi končnih elementov in eksperimentalne analizeTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Fakulteta za strojništvo