Utjecaj parametara izrade na mehanička svojstva 3D-ispisanih dijelova

undergraduate thesis

• Title (english): The influence of fabrication parameters on the mechanical properties of 3D printed parts
• Author: Martina Šimonek
• Mentor: Domagoj Vrsaljko (mentor)
• Committee member: Domagoj Vrsaljko (predsjednik povjerenstva)
• Committee member: Mirela Leskovac (član povjerenstva)
• Committee member: Aleksandra Sander (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2020-09-14, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering

Abstract

Aditivna proizvodnja je proces kojim nastaju trodimenzionalni predmeti slaganjem materijala sloj po sloj. Izgled modela uobičajeno se izrađuje CAD programom, a popularno se naziva i tehnologija 3-D ispisa. Od nekoliko metoda aditivne proizvodnje, najpoznatija je metoda proizvodnje rastaljenim filamentom, FFF (eng. Fused Filament Fabrication). FFF metodom se plastomerni materijal uvodi kroz ekstruder te se tali i slaže sloj po sloj u željeni oblik zadan ranije izrađenim modelom u programu. U okviru ovog rada ispitivan je utjecaj parametara izrade na mehanička svojstva materijala. Korišteni materijali su akrilonitril/ butadien /stiren (ABS) i cikloolefinski kopolimer (COC). Mehanička svojstva koja se ispituju su čvrstoća i žilavost materijala te utjecaj povišene temperature i otapala (acetona). Dobiveni rezultati pokazali su da u slučaju ABS-a epruveta ispisana pod 0°, zadane brzine ispisa ( SM 0 % ) i temperature dize 275 °C ( Δt= 0 °C ), te debljine sloja 0.14 mm ima najveći rad loma, a time i najveću žilavost. Kod COC-a najveće vrijednosti naprezanja i rada loma, odnosno čvrstoću i žilavost postiže epruveta ispisana pod kutom ispisa 0°, SM 25 %, te temperature dize 260 °C ( Δt = -15 °C ). Ukupni rezultati ovog rada ukazuju da svi parametri ne djeluju jednako na promjenu mehaničkih svojstava, te da najveći utjecaj imaju pare otapala.

Abstract (english)

Additive manufacturing is a process of creating three-dimensional objects by adding material layer by layer. Nature of the model is determined in computer-aided design program (CAD), and is popularly called 3-D printing technology. From several different additive manufacturing methods, the most known is fused filament fabrication, FFF. With this method, thermoplastic material is led into extruder, fused and deposited layer by layer into wanted shape which is determined by previously made model in CAD program. Scope of this study focuses on the influence of manufacturing parameters on mechanical properties of material. Used materials are acrylonitrile/ butadiene /styrene (ABS) and cyclic olefin copolymer (COC). Mechanical properties that are examined are strength and toughness of materials as well as influence of higher temperature and solvent (acetone). The results have shown that in case of ABS, the specimen printed at 0°, having set print speed ( SM 0 % ), nozzle temperature 275 °C
( Δt = 0 °C ) and layer thickness of 0.14 mm has the highest work to break value, and with that the highest toughness. With COC, the highest value of stress and work to break, apropos the highest strength and toughness is achieved with specimen printed at 0°,
SM 25 % and the nozzle temperature of 260 °C ( Δt = -15 °C ). The overall results of this work show that not all parameters have the same effect on the change of mechanical properties, and that solvent vapors have the greatest influence on mechanical properties of material.

• Keywords: aditivna proizvodnja; proizvodnja rastaljenim filamentom; mehanička svojstva; ABS; COC
• Keywords (english): additive manufacturing; fused filament fabrication; mechanical properties; ABS; COC
• Language: croatian
• URN:NBN: urn:nbn:hr:149:244563
• Project: Number: UIP-2014-09-3154; Title: Razvoj materijala za 3D tiskanje mikroreaktora; Title: Development of materials for 3D printing of microreactors; Acronym: 3Dmicroreactors; Leader: Domagoj Vrsaljko; Jurisdiction: Croatia; Funder: HRZZ; Funding stream: UIP
• Study programme: Title: Chemical Engineering - Undergraduate study; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-05-09 08:16:49