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Drying shrinkage of sawn timber of Norway spruce (Picea abies): industrial measurements and finite element simulations
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.ORCID iD: 0000-0002-0145-080X
2011 (English)In: Wood Material Science & Engineering, ISSN 1748-0272, E-ISSN 1748-0280, Vol. 6, no 1-2, p. 41-48Article in journal (Refereed) Published
Abstract [en]

Industrial measurements of green and dry cross-section dimensions were performed for 189 Norway spruce (Picea abies) centre-yield boards with dry dimensions 51 times 149 mm. Two, three or four boards were sawn from each log, depending on log size. Different approaches were used for simulations of cross-section shrinkage during drying. An analytical model, an elastic, an elastic- mechanosorptive and an elastic- plastic finite element simulation model were tested. Thickness and width shrinkage and deformation were simulated. Shrinkage results were compared with each other and with the experimental results. All simulation models gave roughly the same degree of agreement with experimental results except for the centre board from the three-board sawing pattern. For the other boards, the analytical model was not generally better or worse than the results from the finite element models. Shrinkage deformations in finite element models that included mechanosorption or plasticity were nearly the same as for the elastic finite element model except for the centre board of the three-board sawing pattern. The mechanosorptive model was the best model for the shrinkage of the centre board of this sawing pattern except for mid-thickness shrinkage. Comparison between the different finite element simulation models of stresses in the centre board revealed large differences.

Place, publisher, year, edition, pages
2011. Vol. 6, no 1-2, p. 41-48
Keywords [en]
Materials science - Construction materials
Keywords [sv]
Teknisk materialvetenskap - Konstruktionsmaterial
National Category
Other Mechanical Engineering
Research subject
Wood Technology
Identifiers
URN: urn:nbn:se:ltu:diva-15958DOI: 10.1080/17480272.2010.523121Scopus ID: 2-s2.0-79953033534Local ID: f8a308a0-d1ee-11df-a707-000ea68e967bOAI: oai:DiVA.org:ltu-15958DiVA, id: diva2:988934
Note
Validerad; 2011; 20101007 (matse)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Ekevad, MatsLundgren, NilsFlodin, Jens

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