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Tensile behaviour of radiata pine with different moisture contents at elevated temperatures
New Zealand Forest Research Institute (Scion), New Zealand.
University of Waikato, New Zealand.
DTU -Technical University of Denmark, Denmark .ORCID iD: 0000-0001-5591-1045
2012 (English)In: Holzforschung, ISSN 0018-3830, E-ISSN 1437-434X, Vol. 66, no 5, 659-665 p.Article in journal (Refereed) Published
Abstract [en]

The aim of this study was to obtain tensile elastic modulus (EM) information for radiata pine (Pinus radiata D. Don) sapwood in tangential grain direction, over a temperature range of 70 °C to 150 °C for a wide range of moisture contents. Such information is scarce, probably because of difficulties with research equipment design and process control strategies to perform accurate tests. As expected, EM dramatically decreased with increasing temperature and moisture content. The results were modelled to yield a relationship between stress and strain. The results were also successfully transposed into a mastercurve based on temperature-moisture equivalence through a modified form of the Williams, Landel, and Ferry equation for amorphous polymers. This result is consistent with the view that wood is visco-plastic around the glass transition zone of the ligno-hemicellulosic matrix. It is demonstrated that moisture and temperature can play a significant role in reducing stress during drying, regardless of the drying time. Properties of wood, such as tensile elastic information at elevated temperatures, are important for mechanical design, distortion modelling and understanding the fundamental behaviour of wood in general.

Place, publisher, year, edition, pages
Walter de Gruyter, 2012. Vol. 66, no 5, 659-665 p.
Keyword [en]
Drying, Elastic modulus, Mechanical properties, Temperature-moisture equivalence, Tensile elastic modulus, Wood
National Category
Engineering and Technology Wood Science
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
URN: urn:nbn:se:lnu:diva-41197DOI: 10.1515/hf-2011-0185OAI: oai:DiVA.org:lnu-41197DiVA: diva2:797462
Available from: 2015-03-24 Created: 2015-03-22 Last updated: 2016-05-03Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf