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Effect of relative humidity and temperature on the strength properties of finger-jointed furniture components from solid scots pine
Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
2018 (English)Independent thesis Basic level (professional degree), 180 HE creditsStudent thesis
Abstract [en]

Mechanical strength in wood has always been compromised due to the complex behaviours of the material when interfered with moisture and heat. These factors has always limited the use of the material. However, the will of using more sustainable materials such as wood has contributed to a wider use of the material and several new ways that lead to improvement. Several of these methods emphasizes the joining of two wood components together endwise, where finger-joints are the most commonly used method. Several studies regarding how well finger-joints can withstand external load has been made over the years. However, many of these studies focuses on geometrical properties or strength varying in different species.

This study focuses on how relative humidity and temperature affects mechanical strength in finger-jointed wood products. There were beliefs before the research started that increasing temperature would affect mechanical strength greatly. However, it turned out to only affect the mechanical strength marginally, and that relative humidity was the largest contributor to decreasing tolerance levels. It is important to notify that mechanical strength seemed to be directly affected to moisture content (MC), which is a result of an interactive relationship with both temperature and RH. It was particularly MC-levels above 9.2% that showed a decrease in mechanical strength.

This research also focused on estimating the relative MOR per cross-section in varying conditions. This method could be used to better understand to which degree hygroscopic factors affects mechanical strength relative to the glued-surface area between finger-joints. Even though the findings in this study indicates that there seems to be possible to estimate strength in regards to relative MOR per cross-section, the results were not sufficient to be viewed as scientifically proof. The findings could however be used as ground for future studies.

Place, publisher, year, edition, pages
2018. , p. 37
Keywords [en]
Finger-joint
National Category
Engineering and Technology Forest Science
Identifiers
URN: urn:nbn:se:lnu:diva-75368OAI: oai:DiVA.org:lnu-75368DiVA, id: diva2:1215281
External cooperation
IKEA
Subject / course
Skogs- och träteknik
Educational program
Forest and Wood Engineering Programme, 180 credits
Supervisors
Examiners
Available from: 2018-06-11 Created: 2018-06-08 Last updated: 2018-06-11Bibliographically approved

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File name FULLTEXT01.pdfFile size 2076 kBChecksum SHA-512
5154ccf8f1d0422fc5282e978866d1e1451101f0f89fd45e50bf9ae0baa6f1b32576126ccfa6832ca21231633e210f6acc98577525ffdbdd978e39dcf59ce564
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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