Mechanical properties of 3D printed objects

Markotić, Danijela (2014) Mechanical properties of 3D printed objects. Master's thesis - Graduate Programme. Grafički fakultet. [Mentor: Lozo, Branka].

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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.

Item Type:	Master's thesis - Graduate Programme
Mentor name:	Lozo, Branka
Defence date:	24 September 2014
Abstract in 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.
Uncontrolled Keywords:	ABS materijal, PLA materijal, FDM tehnika ispisa, vlačna čvrstoća
Keywords in english:	ABS filament, PLA filament, FDM printing technology, tensile strength
Subjects:	TECHNICAL SCIENCES > Graphic Technology
Institution:	Grafički fakultet
City:	Zagreb
Number of Pages:	115
Callnumber:	loz 2014 mar
Inventory number:	DB414
Depositing User:	Antonia Grgurović
Status:	Unpublished
Date Deposited:	29 Sep 2014 08:57
Last Modified:	29 Sep 2014 08:57
URI:	http://eprints.grf.unizg.hr/id/eprint/2222

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