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Bending and Creep Deformation of a Wood-Based Lightweight Panel: An Experimental Study
Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.ORCID iD: 0000-0003-0130-3356
2019 (English)In: Wood and Fiber Science, ISSN 0735-6161, Vol. 51, no 1, p. 16-25Article in journal (Refereed) Published
Abstract [en]

When wood is exposed to long-term loading, creep deformation can occur because of its viscoelastic characteristic. The aim of this study was to increase the understanding and knowledge of creep deformation of a wood-based lightweight sandwich-type panel and to see if this type of panel has similar properties for creep as solid wood has. This was done by means of a study based on experiments. The panel studied consisted of two face sheets of beech wood and a core of pinewood struts cross-glued to the face sheets. A solid beech panel was used as a reference. In all, there were 27 samples for the test. The densities of the lightweight panel varied from 165 to 297 kg/m(3), compared with the density of the solid panel of 705 kg/m(3). The study consisted of two parts: a bending test and a creep test. The bending test was used to determine the maximum failure load for the panel. For the creep test, 30% of the original failure load was used. When the results from the bending tests were ranked for load capacity in relation to density, the results for the lightweight panel varied from 9.0 to 18.0 m(4)/s(2), compared with the value of the reference panel at 27.3 m(4)/s(2). This measured how effective the panel was in withstanding bending loads in relation to their density. However, this was not to say that the panel with the highest value also took the highest load in absolute terms. If the creep deformation is instead ranked in relation to density, the results for the lightweight panel varied from 10.4 to 33.7 kg/m, compared with the value of the reference panel at 45.5 kg/m. As with the bending test, these values rank how effective the panel was in resisting creep deformation in relation to density.

Place, publisher, year, edition, pages
2019. Vol. 51, no 1, p. 16-25
Keywords [en]
Lightweight panel, bending, creep, deformation, rupture
National Category
Wood Science
Research subject
Technology (byts ev till Engineering), Forestry and Wood Technology
Identifiers
URN: urn:nbn:se:lnu:diva-80284DOI: 10.22382/wfs-2019-003ISI: 000456400500003Scopus ID: 2-s2.0-85061498161OAI: oai:DiVA.org:lnu-80284DiVA, id: diva2:1286729
Available from: 2019-02-07 Created: 2019-02-07 Last updated: 2019-08-29Bibliographically approved

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Nilsson, JonazJohansson, Jimmy

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