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Stress distribution in veneers under lamination and simultaneously bending: an experimental and numerical investigation
RISE, Sweden.
Linnaeus University, Faculty of Technology, Department of Building Technology.ORCID iD: 0000-0001-5591-1045
RISE, Sweden.
2023 (English)In: Wood Material Science & Engineering, ISSN 1748-0272, E-ISSN 1748-0280, Vol. 18, no 3, p. 995-1002Article in journal (Refereed) Published
Abstract [en]

Laminated veneer products (LVPs) are veneers glued together into a predetermined shape. Experimental and numerical investigations were performed under lamination and simultaneously bending of veneer laminate to study the stress distribution in the laminate. Laminates of different thicknesses were made of peeled veneers of European beech. The veneers were coated with adhesive, inserted in a mould which had the shape of a semicircle, and finally pressed at 20 degrees C to a laminate. Two Teflon-polymer films including sensors for measurement of the contact pressure were placed on both sides of the laminate to measure the local contact pressure (contact stress) between the laminate and the mould. At the beginning of the bending process, the contact stresses were locally distributed over the laminate in a similar pattern as in a three-point bending; after the laminate was further bent, the stress distribution rearranged to be as in four-point bending. In the end of the moulding, the local contact stresses increased over the entire laminate and reached a 'peak-value' over bent area in the middle part of the mould. A finite-element model was created to study the bending process. Regarding the overall development of the contact stress variations, the experimental and the numerical results agreed.

Place, publisher, year, edition, pages
Taylor & Francis Group, 2023. Vol. 18, no 3, p. 995-1002
Keywords [en]
Wood, European beech, veneer-sheet moulding, FE-modelling, contact pressure
National Category
Wood Science
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
URN: urn:nbn:se:lnu:diva-116333DOI: 10.1080/17480272.2022.2099762ISI: 000837148500001Scopus ID: 2-s2.0-85135440583OAI: oai:DiVA.org:lnu-116333DiVA, id: diva2:1696965
Available from: 2022-09-19 Created: 2022-09-19 Last updated: 2023-06-20Bibliographically approved

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Ormarsson, Sigurdur

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  • apa
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