Journal of Wood Science

, Volume 51, Issue 4, pp 401–404 | Cite as

Elastic strain at semi-isostatic compression of Scots pine (Pinus sylvestris)

  • Jonas BlombergEmail author


Quarter-sawn and plain-sawn specimens of Scots pine were semi-isostatically compressed at 5, 15, 50, and 140 MPa in a Quintus press. Elastic strain was measured using a telescope device that was pushed together when wood was compressed and remained in this position at release of pressure. Delayed elastic and plastic strains were assessed through repeated callipering during 5 years after densification. At 140 MPa, wood reached an almost compact structure (ρ ≈ 1450 kg/m3) but as a result of elastic springback the density decreased to just below 1000 kg/m3. At 140 MPa, the elastic and delayed elastic strains were 14.6% and 1.8%, respectively, in quarter-sawn specimens, and were 13.1% and 0.8%, respectively, in plain-sawn specimens. The higher elastic strains in quarter-sawn specimens can be attributed to elastic springback in the tangentially deformed latewood bands.

Key words

Elastic strain Semi-isostatic compression Quintus press Density 


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Copyright information

© The Japan Wood Research Society 2005

Authors and Affiliations

  1. 1.Dalarna UniversityBorlängeSweden
  2. 2.Luleå University of Technology, Skellefteå CampusSkellefteåSweden

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