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Biocomposite panels with unidirectional core stiffeners − 3-point bending properties and considerations on 3D printing and extrusion as a manufacturing method
NTNU, Norway.
RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design.ORCID iD: 0000-0002-6183-2017
NTNU, Norway.
2023 (English)In: Composite structures, ISSN 0263-8223, E-ISSN 1879-1085, Vol. 313, article id 116930Article in journal (Refereed) Published
Abstract [en]

Sandwich panels with unidirectional core stiffeners are known for their relatively high bending stiffness at low weight, stability under compressive and shear loads and energy absorption capability. In this study, 3D printing was used to screen biocomposite sandwich panels easily and preliminarily with different unidirectional core stiffener designs. Thermomechanical pulp (TMP) fibre-reinforced poly(lactic acid) (PLA) was used in this study. A corrugated, trapezoid and arched cell structure were tested experimentally and numerically using a bimodular material model, accounting for different behaviour in tension and compression. The trapezoid structure showed the best flexural properties of the three 3D-printed sandwich beams. It was chosen to be explored further, manufacturing it by extrusion. Extrusion is a production process likely to be used in industry on a larger scale. Basic material properties of the biocomposites were obtained from injection moulded dogbone specimens. The flexural properties of the extruded panels were measured experimentally and simulated using finite element analysis. Simulations were done with a hyperelastic material model. Predictions and experiments were in adequate agreement, allowing such kind of simulation to be used for extruded biocomposite sandwich panels. © 2023 The Author(s)

Place, publisher, year, edition, pages
Elsevier Ltd , 2023. Vol. 313, article id 116930
Keywords [en]
3D printing, Biocomposites, Extrusion, Mechanical properties, Wood fibres, Bending strength, Composite materials, Extrusion molding, Honeycomb structures, Injection molding, Sandwich structures, 3-D printing, 3D-printing, Bending properties, Bending stiffness, Biocomposite, Flexural properties, Manufacturing methods, Point bending, Sandwich panel, Woodfiber, Tensile strength, Bend Strength, Composites, Stiffness
National Category
Composite Science and Engineering
Identifiers
URN: urn:nbn:se:ri:diva-64402DOI: 10.1016/j.compstruct.2023.116930Scopus ID: 2-s2.0-85150827371OAI: oai:DiVA.org:ri-64402DiVA, id: diva2:1754322
Note

Funding details: Norges Forskningsråd, 282310; Funding text 1: The Research Council of Norway and the companies supporting the ALLOC project (Grant no. 282310) are thanked for funding.

Available from: 2023-05-03 Created: 2023-05-03 Last updated: 2023-05-03Bibliographically approved

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Chinga Carrasco, Gary

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