Altering the elastic properties of 3D printed poly-lactic acid (PLA) parts by compressive cyclic loading

Tomaž Pepelnjak (Author), Ako Karimi (Author), Andraž Maček (Author), Nikolaj Mole (Author)

Abstract

In designing high-performance, lightweight components, cellular structures are one of the approaches to be considered. The present study aimed to analyze the effect of the infill line distance of 3D printed circular samples on their compressive elastic behavior. Lightweight cellular poly-lactic acid (PLA) samples with a triangular infill pattern were exposed to cyclic compressive loading and their stiffness was investigated. PLA is one of the most commonly used thermoplastic materials in additive manufacturing using the fused filament fabrication (FFF) process. Cylindrical samples with a diameter of 11.42 mm and a height of 10 mm were printed using FFF technology with two different infill line distances (1.6 mm and 2.4 mm). Comparing the nominal compressive stress-nominal strain curves under cyclic loading showed that the first cycle response was significantly different with respect to the subsequent ones. Furthermore, an analysis of the dependence of the modulus of elasticity on the effects of cyclic loading was performed. It was found that through elastic deformation, and combined elastic and plastic deformation, the samples% properties such as stiffness could be altered

Keywords

3D tiskanje;FFF;PLA;tlačni preizkus;ciklično obremenjevanje;3D printing;compression test;cyclic loading;

Data

Language:	English
Year of publishing:	2020
Typology:	1.01 - Original Scientific Article
Organization:	UL FS - Faculty of Mechanical Engineering
UDC:	004.92:620.173(045)
COBISS:	32536579
ISSN:	1996-1944
Views:	375
Downloads:	134
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	3D tiskanje;FFF;PLA;tlačni preizkus;ciklično obremenjevanje;
Type (COBISS):	Article
Pages:	f. 1-18
Volume:	ǂVol. ǂ13
Issue:	ǂiss. ǂ19
Chronology:	Oct. 2020
DOI:	10.3390/ma13194456
ID:	12080808