Material extrusion 3D printing of biodegradable composites reinforced with continuous flax fibers

Kajbič, Jure (author), Fajdiga, Gorazd (author), Klemenc, Jernej (author)

Fabricating additively manufactured thermoplastic parts with increased load-bearing capacity using material extrusion, namely fused deposition modeling, requires the incorporation of continuous reinforcing fibers. In this study, composites of PLA matrix and continuous flax fibers were additively fabricated using a specially designed 3D printer with multiple deposition toolheads. Unidirectional tensile and flexural specimens with a component-like shape and a fiber volume fraction of up to 18% were fabricated. The mechanical properties were determined for four different composite and matrix layers arrangements. The tensile modulus of elasticity and strength values increased by 3.6 and 2.9 times, respectively, compared to the specimens without the reinforcing fibers. In contrast, the flexural modulus of elasticity improved by 2.4 times, while the flexural strength increased by 1.4 times. It was found that it is possible to influence the mechanical properties and the type of damage by changing the volume fraction of the fibers and the arrangement of the composite layers.

• Language: English
• Keywords: fused deposition modeling, FDM, composites, continuous flax fibers, mechanical properties
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering; BF - Biotechnical Faculty
• Publication status: Published
• Publication version: Version of Record
• Year: 2023
• Number of pages: Str. 3610-3620
• Numbering: Vol. 27
• PID: 20.500.12556/RUL-152123-b520b319-259f-87ca-2a29-260db2215492
• UDC: 62:531
• ISSN on article: 2238-7854
• DOI: 10.1016/j.jmrt.2023.10.148
• COBISS.SI-ID: 171005955
• Publication date in RUL: 06.11.2023

Record is a part of a journal

• Title: Journal of materials research and technology
• Shortened title: J. mater. res. technol.
• Publisher: Elsevier
• ISSN: 2238-7854
• COBISS.SI-ID: 519699737

Licences

• License: CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
• Link: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Description: The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.

Secondary language

• Language: Slovenian
• Keywords: ciljno odlaganje materiala, kompoziti, neprikinjena lanena vlakna, mehanske lastnosti

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0182
• Name: Razvojna vrednotenja

• Funder: ARRS - Slovenian Research Agency
• Funding programme: Young researchers