Vpliv zapolnitve na mehanske lastnosti izdelkov iz PLA in ABS narejenih po metodi ciljnega nalaganja

Jankovič, Denis (author), Valentinčič, Joško (mentor), Šturm, Roman (co-mentor)

Aditivne tehnologije temeljijo na nanašanju oz. utrjevanju materiala v plasteh. Najbolj znana je metoda ciljnega nalaganja. V magistrskem delu obravnavamo vpliv stopnje zapolnitve notranjosti izdelka na njegove mehanske lastnosti. Izdelan je plan eksperimentov na podlagi preliminarnih raziskav. Ugotoviti želimo primerno stopnjo zapolnitve s trikotno notranjo strukturo za materiala PLA in ABS. Po standardih za preizkušanje plastike SIST EN ISO 178 in SIST EN ISO 179 smo natisnili preizkušance ter izvedli upogibni preizkus in preizkus udarne žilavosti po Charpyju. Ugotovili smo, da material PLA prenaša večje upogibne obremenitve, medtem ko material ABS prenaša višjo udarno delo K. Mehanske lastnosti se linearno izboljšujejo z večanjem faktorja zapolnitve. Večje izboljšanje mehanskih lastnosti je opazno med 90 % in 100 % stopnjo zapolnitve. Zato je za bolj obremenjene dele smiselno uporabiti 100 % stopnjo zapolnitve. V primeru manjših obremenitev je primerneje izbrati manjšo stopnjo zapolnitve, da dosežemo večjo dimenzijsko natančnost.

• Language: Slovenian
• Keywords: aditivne tehnologije metoda ciljnega nalaganja (FDM) notranja struktura stopnja zapolnitve mehanske lastnosti
• Work type: Master's thesis/paper
• Organization: FS - Faculty of Mechanical Engineering
• Year: 2018
• PID: 20.500.12556/RUL-105477
• Publication date in RUL: 01.12.2018

Secondary language

• Language: English
• Title: The effect of infill on mechanical properties of PLA and ABS products made by additive technologies

Abstract

Additive technologies are based on depositing and hardening material in layers. Most known is FFF (eng. Fused filament fabrication), known as FDM (eng. Fused deposition modeling). In this thesis, the influence of infill structure density on mechanical properties of the product is examined. Based on preliminary research, a new plan of experiments is prepared. The study examines a suitable level of inner filling with a chosen triangular inner structure for PLA and ABS material. According to standards for testing plastic specimens SIST EN ISO 178 and SIST EN ISO 179, the task was to print samples and perform bending and Charpy test. The results showed that material PLA has better bending properties, while material ABS achieve higher impact toughness. While infill rate increase, mechanical properties linearly improve. Improvement in mechanical properties is significantly noticeable between 90 % and 100 % infill rate. Therefore, for more heavily loaded parts, it is reasonable to use a 100 % infill rate. In the case of smaller loads, a minimum infill rate is recommended to achieve greater dimensional accuracy.

• Keywords: additive technologies fused filament fabrication inner structure infill fillness mechanical properties