Effects of the face/core layer ratio on the mechanical properties of 3D printed wood/polylactic acid (PLA) green biocomposite panels with a gyroid core

Ayrilmis, Nadir (author), Nagarajan, Rajini (author), Kitek Kuzman, Manja (author)

Gyroid structured green biocomposites with different thickness face layers (0.5, 1, 2 and 2.5 mm) were additively manufactured from wood/polylactic acid (PLA) filaments using a 3D printer. The mechanical properties of the composite panels, bending properties, compressive strength (parallel to the surface), Brinell hardness, and face screw withdrawal resistance, were determined. The surface layer thickness significantly affects the mechanical properties of the composite materials. As the surface layer thickness was increased from 0.5 to 2.5 mm, all the mechanical properties significantly improved. In particular, the Brinell hardness and face screw withdrawal resistance of the specimens improved sharply when the skin thickness was higher than 2 mm. The bending strength, bending modulus, compressive strength (parallel to the surface), Brinell hardness, and face screw withdrawal resistance of the specimens with a skin of 0.5 mm were found to be 8.10, 847.5, 3.52, 2.12 and 445 N, respectively, while they were found to be 65.8, 11.82, 2492.2, 14.62, 26 and 1475 N for the specimens with a 2.5 mm skin. Based on the findings from the present study, gyroid structured composites with a thickness of 2 mm or higher are recommended due to their better mechanical properties as compared to the composites with skins that are thinner.

• Language: English
• Keywords: 3D printing, design, wood, lightweight, mechanical properties, gyroid core, polylactic acid, shell ratio
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: BF - Biotechnical Faculty
• Publication status: Published
• Publication version: Version of Record
• Year: 2020
• Number of pages: 8 str.
• Numbering: Vol. 12, iss. 12, art. 2929
• PID: 20.500.12556/RUL-134707
• UDC: 630*8
• ISSN on article: 2073-4360
• DOI: 10.3390/polym12122929
• COBISS.SI-ID: 41466371
• Publication date in RUL: 27.01.2022

Record is a part of a journal

• Title: Polymers
• Shortened title: Polymers
• Publisher: MDPI
• ISSN: 2073-4360
• COBISS.SI-ID: 517951257

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: 07.12.2020

Secondary language

• Language: Slovenian
• Keywords: 3D tiskanje, oblikovanje, les, lahka plošča, mehanske lastnosti, giroidna struktura

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P4-0015
• Name: Les in lignocelulozni kompoziti