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The effect of chemical changes during thermal modification of European oak and Norway spruce on elasticity properties
Department of Wood Processing and Biomaterials, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague,Suchdol, Czech Republic.
Department of Wood Processing and Biomaterials, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague,Suchdol, Czech Republic.Department of Chemistry and Chemical Technologies, Faculty of Wood Sciences and Technology, Technical University in Zvolen, Zvolen, Slovakia.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Träteknik. Department of Wood Processing and Biomaterials, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague,Suchdol, Czech Republic.ORCID-id: 0000-0002-4526-9391
Department of Wood Processing and Biomaterials, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague,Suchdol, Czech Republic.
Vise andre og tillknytning
2019 (engelsk)Inngår i: Composite structures, ISSN 0263-8223, E-ISSN 1879-1085, Vol. 220, s. 529-538Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The elasticity in bending of European oak (Quercus robur L.) and Norway spruce (Picea abies (L.) Karst.) timber was evaluated before and after thermal modificationand related to the changes in chemical composition of the wood as a result of the modification. A new software was developed (MATESS) and used to identify characteristic points on the force-deformation diagram. The modulus of elasticity(MOE), stress at the limit of proportionality (LOP) and elastic potential (PE) were used to describe the wood properties. Extractives, lignin, cellulose, holocellulose, and hemicelluloses were analysed to reveal the patterns that occur during the loading of the specimens. Thermal modification lowers the mechanical properties (MOE, LOP and PE) of oak and spruce wood, and the reduction increases with increasing modification temperature. Changes in chemical composition of thermally modified wood show a strong relationship to the reduction in elasticity properties for bot species.

sted, utgiver, år, opplag, sider
Elsevier, 2019. Vol. 220, s. 529-538
Emneord [en]
Modulus of elasticity, Limit of proportionality, Elastic potential, Thermally modified wood
HSV kategori
Forskningsprogram
Träteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-73601DOI: 10.1016/j.compstruct.2019.04.034ISI: 000465495700047Scopus ID: 2-s2.0-85064095092OAI: oai:DiVA.org:ltu-73601DiVA, id: diva2:1304226
Merknad

Validerad;2019;Nivå 2;2019-04-11 (johcin)

Tilgjengelig fra: 2019-04-11 Laget: 2019-04-11 Sist oppdatert: 2019-06-18bibliografisk kontrollert

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