diplomsko delo
Matevž Kokot (Author), Manja Kitek Kuzman (Reviewer), Mirko Kariž (Mentor), Aleš Straže (Co-mentor)

Abstract

V okviru diplomske naloge smo proučevali osnovne mehanske lastnosti in dimenzijsko stabilnost 3D natisnjenih vzorcev iz štirih različnih materialov v spreminjajočih se klimatskih pogojih. Uporabili smo čisti PLA ter tri lesno-plastične kompozite z različnimi deleži lesa (do 40 %, 15 % in 25 %). Vzorce smo najprej navlaževali, nato pa smo jih sušili ter spremljali njihove dimenzijske spremembe. S pridobljenimi informacijami o izbranih materialih smo se lotili priprave in izdelave vzorcev iz dveh različnih materialov (PLA in lesno-plastični kompozit) v različnih debelinah plasti v sestavljenem vzorcu. Za lažjo predstavo, kako se bodo naši preizkušanci odzivali, smo izpeljali računalniške simulacije v programu SolidWorks ter izbrali optimalne kombinacije debelin plasti in materialov, ki naj bi v spreminjajočih se klimatskih pogojih dosegli največje spremembe oblike. Material PLA je bil v vseh primerih izbran za pasivno plast, za aktivno plast smo izbrali materiala s 15 % in 25 % deležem lesenega prahu. Pri tako natisnjenih elementih smo ugotavljali njihov odziv na izpostavitev v vlažni klimi (RZV 88 %). S kombinacijo dveh materialov v enem elementu in z izpostavitvijo teh elementov v vlažni klimi smo sprožili avtonomen odziv sistemov (vzorci so se samodejno odklonili). Najbolj so spremenili obliko % se odklonili vzorci, ki so imeli v aktivni plasti material z večjim deležem lesa, na velikost in hitrost odklona pa vpliva tudi razmerje med debelino plasti PLA in lesno-plastičnega kompozita.

Keywords

3D tisk;4D tisk;lesno-plastični kompoziti;dimenzijska stabilnost;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL BF - Biotechnical Faculty
Publisher: [M. Kokot]
UDC: 630*862:004.356.2
COBISS: 75239427 Link will open in a new window
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Downloads: 24
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Other data

Secondary language: English
Secondary title: Influence of the composition of 3D printed composites on shape and dimensional stability under changing climatic conditions
Secondary abstract: In the thesis, we studied the basic mechanical properties and dimensional stability of 3D printed samples from four different materials in changing climatic conditions. We used pure PLA and three wood-plastic composites, with different wood ratios (up to 40 %, 15 %, and 25 %). The samples were first moistened, then dried and their dimensional changes monitored. With the obtained information on selected materials, we started preparing and making samples from two different materials (PLA and wood-plastic composite) in different layer thicknesses in the composite sample. To make it easier to see how our tests will respond, we performed computer simulations in SolidWorks and selected the optimal combinations of layer thicknesses and materials to achieve the greatest shape changes in changing climatic conditions. In all cases, the PLA material was selected as the passive layer, and the material with the 15 % and 25 % wood dust content was chosen as the active layer. In the case of such printed elements, we determined their response to exposure in a humid climate (RZV 88 %). By combining two materials in one element and exposing these elements in a humid climate, we triggered an autonomous response of the systems (samples were automatically curved. The samples, which had material with a higher proportion of wood in the active layer, changed the shape % curved the most, and the size and velocity of the deformation are also influenced by the ratio between the thickness of the PLA layer and the wood-plastic composite.
Secondary keywords: 3D print;4D print;wood-plastic composite filament;dimensional stability;
Type (COBISS): Bachelor thesis/paper
Study programme: 0
Thesis comment: Univ. v Ljubljani, Biotehniška fak., Oddelek za lesarstvo
Pages: IX, 60 f., [4] f. pril.
ID: 13317626