Mechanical properties of 3D printed objects

master's thesis

• Author: Danijela Markotić
• Mentor: Branka Lozo (mentor)
• Committee member: Damir Modrić (član povjerenstva)
• Committee member: Branka Lozo (član povjerenstva)
• Committee member: Igor Zjakić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Graphic Arts; Zagreb
• Defense date and country: 2014-9-24, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Graphic Technology

Abstract

3D ispis je proces aditivne proizvodnje (AM) tijekom koje 3D pisač gradi prethodno modulirani 3D objekt. Prvenstveno se ova tehnika koristila za izradu prototipova, dok se danas 3D ispis primjenjuje u gotovo svim granama industrije. “Fused deposition modeling”, poznata kao I termosplatična ekstruzija, je najčešće korištena tehnika zbog niske cijene materijala, lake dostupnosti 3D pisača I brzine ispisa. 3D pisači uglavnom koriste termoplastične materijale, a to

su najčešće Polilaktaltna kiselina ili Polilaktid (PLA) i Akrilonitril butadien stiren (ABS), koji su u obliku žice namotane na kolutu. ABS je čvrsti polimerni materijal, dok je PLA biorazgradivi polimer koji se može proizvesti iz obnovljivih izvora kao što su kukuruzni škrob i šećerna trska. Mlaznica 3D pisača ima funkciju topljenja materijala te njegovog odlaganja na površinu za ispis ili

prethodno ispisani sloj 3D objekta. Nakon što mlaznica ispiše jedan sloj, površina za ispis (“printing bed”) se spušta ovisno o debljini ispisanog sloja te

se sam proces ispisa nastavlja. Ova tehnika tiska svakodnevno napreduje, jeftina je, brza i dostupna, zbog čega su njene mogućnosti gotovo neograničene. Istraživanje se temelji na mehaničkim svojstvima PLA i ABS 3D

ispisanih objekata, na primjer vlačno ispitivanje 3D ispisanih objekata.

Abstract (english)

The 3D printing is an additive manufacturing (AM) technology, meaning that 3D printing machine produces a previously modulated 3D objects by adding and

stacking different kinds of materials layer on layer. At the beginning the 3D technology was mainly used for prototyping but nowadays it is applicable in almost every branch of industry. Fused deposition modeling also known as thermoplastic extrusion will be used

in the research; it is nowadays the most common 3D printing technique with respect to the price of materials and 3D printers as well as its fastness. FDM printers mostly use the thermoplastic filaments, usually Polylactic Acid or

Polylactide (PLA) or Acrylonitrile Butadiene Styrene (ABS). They come in shape of wire coiled on the spool from which they are brought to the tiny heated extruding nozzle. Nozzle has a function of melting and deposition of the material

on print-bed or alongside layer, depending on the data code. After one layer is built, the print-bed moves down by the distance equal to layer thickness and the

building continues for another layer. The whole printing technique is getting faster, cheaper, wider, therefore better every day, the possibilities of 3D printing

are almost limitless. The focus of the thesis is set on the mechanical properties of the PLA and ABS 3D printed samples, i.e. on the tensile strength of the 3D objects.

• Keywords: ABS materijal; PLA materijal; FDM tehnika ispisa; vlačna čvrstoća
• Keywords (english): ABS filament; PLA filament; FDM printing technology; tensile strength
• Language: croatian
• URN:NBN: urn:nbn:hr:216:396078
• Study programme: Title: Graphic technology; specializations in: Graphic technology, Design of graphic products; Course: Graphic technology; Study programme type: university; Study level: graduate; Academic / professional title: sveučilišni/a magistar/magistra inženjer/inženjerka grafičke tehnologije (sveučilišni/a magistar/magistra inženjer/inženjerka grafičke tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2024-04-18 20:37:48