Numerical investigation of the cycling loading behavior of 3D-Printed poly-lactic acid (PLA) cylindrical lightweight samples during compression testing

Karimi, Ako (author), Mole, Nikolaj (author), Pepelnjak, Tomaž (author)

The additive technologies widely used in recent years provide enormous flexibility in the production of cellular structures. Material extrusion (MEX) technology has become very popular due to the increasing availability of relatively inexpensive desktop 3D printers and the capability of fabricating parts with complex geometries. Poly-lactic acid (PLA) is a biodegradable and commonly applied thermoplastic material in additive manufacturing (AM). In this study, using a simulation method based on the user subroutine titled “user subroutine to redefine field variables at a material point” (USDFLD) in the finite element method (FEM) ABAQUS software, the elastic stiffness (ES) of a cylindrical lightweight cellular PLA sample with a 2.4 mm infill line distance (ILD), which was designed as a layered structure similar to the laboratory mode with a MEX method and was subjected to cyclic compressive loading, was investigated by considering the variation of the Young’s modulus depending on the variation of the equivalent plastic strain (PEEQ). It was observed that the PLA sample’s elastic stiffness increases during cyclic loading. This increase is high in the initial cycles and less in the subsequent cycles. It was also observed that the simulation results are in good agreement with the experimental results.

• Language: English
• Keywords: three-dimensional printing, numerical simulation, PLA, elastic stiffness, compression test, loading–unloading
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Publication date: 10.08.2022
• Year: 2022
• Number of pages: 18 str.
• Numbering: Vol. 12, art. 8018, iss. 16
• PID: 20.500.12556/RUL-138754
• UDC: 519.62:621.7
• ISSN on article: 2076-3417
• DOI: 10.3390/app12168018
• COBISS.SI-ID: 118174211
• Publication date in RUL: 12.08.2022

Record is a part of a journal

• Title: Applied sciences
• Shortened title: Appl. sci.
• Publisher: MDPI
• ISSN: 2076-3417
• COBISS.SI-ID: 522979353

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 10.08.2022

Secondary language

• Language: Slovenian
• Keywords: 3D tiskanje, numerična simulacija, PLA, elastična togost, tlačni test

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0248
• Name: Inovativni izdelovalni sistemi in procesi

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0263
• Name: Mehanika v tehniki