Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): M. Inoue; N. Sekino; T. Morooka; R.M. Rowell; M. Norimoto
    Date: 2008
    Source: Journal of tropical forest science. Vol. 20, no. 4 (2008): Pages 273-281.
    Publication Series: Miscellaneous Publication
    PDF: Download Publication  (332 KB)


    Wood block specimens pre-steamed at 120-220 °C for 5-20 min were compressed in the radial direction. The recovery of set decreased with increasing pre-steaming temperature and time. The reduction of set recovery correlated with the amount of weight loss in steaming irrespective of pre-steaming temperature and time. The weight loss for the highest level of fixation of compressive deformation was about 7.5% that was obtained by pre-steaming at 210-220 °C for 10 min. Moreover, the set recovery of the pre-steamed specimen decreased as pressing temperature and time increased. The compressibility of wood block increased with increasing pre-steaming temperature and time. Large transverse compression and stress relaxation tests showed that Young's modulus and yield stresses were reduced while the stress relaxation magnitude was increased by more severe pre-steaming condition. Scanning electron micrographs showed some cell structure destruction at large deformations in specimens steamed at above 180 °C. This suggests that the wood becomes brittle due to steaming. Creep test data indicate that fluidity decreased with increasing steaming time and temperature. Pre-steam fixation of compressive deformation is due to degradation of the microfibril framework, as well as the viscous flow of the matrix components resulting from the scission of their cross-linked network.

    Publication Notes

    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.


    Inoue, M.; Sekino, N.; Morooka, T.; Rowell, R.M.; Norimoto, M. 2008. Fixation of compressive deformation in wood by pre-steaming. Journal of tropical forest science. Vol. 20, no. 4 (2008): Pages 273-281.


    Set recovery, SEM, visco-elastic properties, wood, compression testing, pine, weight loss, scanning electron microscopy, mechanical properties, heat transfer, viscoelasticity, Japanese red pine, Cryptomeria japonica, modulus of elasticity, deformations, elasticity, temperature, thermal degradation, steaming, dimensional stability, swelling, Sugi, heating time, compression tests, stiffness, creep

    Related Search

    XML: View XML
Show More
Show Fewer
Jump to Top of Page