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

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

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.

• Jezik: Angleški jezik
• Ključne besede: 3D printing, compression test, cyclic loading, FFF, PLA, infill line distance, loading–unloading
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2020
• Št. strani: 18 str.
• Številčenje: Vol. 13, iss. 19, art. 4456
• PID: 20.500.12556/RUL-121580
• UDK: 004.92:620.173(045)
• ISSN pri članku: 1996-1944
• DOI: 10.3390/ma13194456
• COBISS.SI-ID: 32536579
• Datum objave v RUL: 16.10.2020

Gradivo je del revije

• Naslov: Materials
• Skrajšan naslov: Materials
• Založnik: MDPI
• ISSN: 1996-1944
• COBISS.SI-ID: 33588485

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 08.10.2020

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: 3D tiskanje, FFF, PLA, tlačni preizkus, ciklično obremenjevanje

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0248
• Naslov: Inovativni izdelovalni sistemi in procesi

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0263
• Naslov: Mehanika v tehniki