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Journal of Wood Science

Official Journal of the Japan Wood Research Society

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Influence of histories on dynamic viscoelastic properties and dimensions of water-swollen wood

Journal of Wood Science volume 54, pages 95–99 (2008)Cite this article

Abstract

The influences of heating history, cooling method, and cooling set on microstructures and the mechanical properties of water-swollen wood were studied by measuring viscoelastic properties and dimensional changes while elevating temperatures between 20°C and 90°C. Both the viscoelastic properties and dimensional changes of waterswollen wood in the first heating process were quite different from those in the other heating processes. The results revealed that the molecular state of green wood around room temperature was stabilized and could not return to this state if drying or heating was carried out. Cooling methods greatly affected the viscoelastic properties, while they hardly affected dimensional changes when the temperature was elevated. Localized stress in the microstructures of water-swollen wood produced by quenching affected the mechanical properties in the heating process, while external stress less than the proportional limit caused by a cooling set had no effect. This revealed that much greater localized stress linked to the instability of waterswollen wood than the external stress in relation to the cooling set occurred.

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Authors and Affiliations

  1. Biological Function Science Course, Research Division of Agriculture, Graduate School of Kyoto Prefectural University, 1-5 Shimogamo Nakaragi-cho, Sakyo-ku, Kyoto, 606-8522, Japan

    Keisuke Kojiro, Yuzo Furuta & Yutaka Ishimaru

Authors
  1. Keisuke Kojiro
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  2. Yuzo Furuta
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  3. Yutaka Ishimaru
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Correspondence to Keisuke Kojiro.

Additional information

Part of this report was presented at the 53rd Annual Meeting of the Japan Wood Research Society, Fukuoka, March 2003

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Kojiro, K., Furuta, Y. & Ishimaru, Y. Influence of histories on dynamic viscoelastic properties and dimensions of water-swollen wood. J Wood Sci 54, 95–99 (2008). https://doi.org/10.1007/s10086-007-0926-4

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  • DOI: https://doi.org/10.1007/s10086-007-0926-4

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