Effect of printing process parameters on the shape transformation capability of 3D printed structures

Matej Pivar (Author), Diana Gregor-Svetec (Author), Tadeja Muck (Author)

Abstract

The aim of our research was to investigate and optimise the main 3D printing process parameters that directly or indirectly affect the shape transformation capability and to determine the optimal transformation conditions to achieve predicted extent, and accurate and reproducible transformations of 3D printed, shape-changing two-material structures based on PLA and TPU. The shape-changing structures were printed using the FDM technology. The influence of each printing parameter that affects the final printability of shape-changing structures is presented and studied. After optimising the 3D printing process parameters, the extent, accuracy and reproducibility of the shape transformation performance for four-layer structures were analysed. The shape transformation was performed in hot water at different activation temperatures. Through a careful selection of 3D printing process parameters and transformation conditions, the predicted extent, accuracy and good reproducibility of shape transformation for 3D printed structures were achieved. The accurate deposition of filaments in the layers was achieved by adjusting the printing speed, flow rate and cooling conditions of extruded filaments. The shape transformation capability of 3D printed structures with a defined shape and defined active segment dimensions was influenced by the relaxation of compressive and tensile residual stresses in deposited filaments in the printed layers of the active material and different activation temperatures of the transformation.

Keywords

dodajalno izdelovanje;4D tiskanje;PLA;TPU;tiskovna prehodnost;preoblikovanje;additive manufacturing;4D printing;printability;shape transformation;

Data

Language:	English
Year of publishing:	2022
Typology:	1.01 - Original Scientific Article
Organization:	UL NTF - Faculty of Natural Sciences and Engineering
UDC:	655.1
COBISS:	92056835
ISSN:	2073-4360
Views:	82
Downloads:	28
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	dodajalno izdelovanje;4D tiskanje;PLA;TPU;tiskovna prehodnost;preoblikovanje;
Type (COBISS):	Article
Pages:	str. 1-22
Volume:	ǂVol. ǂ14
Issue:	ǂiss. ǂ1
Chronology:	2022
DOI:	10.3390/polym14010117
ID:	15368026