lnu.sePublikationer
Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Spiral grain in Norway spruce: constant change in grain angle in Scandinavian sawlogs
Norwegian Forest Research Institute, Norway. (Department of Economy, Technology and Processing)
Växjö universitet, Fakulteten för matematik/naturvetenskap/teknik, Institutionen för industriella produktionssystem. (School of industrial engeneering)
North Tröndelag Research Institute, Norway.
2002 (Engelska)Ingår i: Forestry (London), ISSN 0015-752X, E-ISSN 1464-3626, Vol. 75, nr 2, s. 163-170Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Any evident grain deviation will reduce strength and increase warp in sawn timber. To describe the magnitude and variance of grain angle in Norway spruce, specimens from 1046 Norwegian sawlogs and 380 logs from Sweden and Finland were examined. For individual specimens, grain angle outside the innermost zone closest to the pith might be expressed by a simple linear function of radial distance from the pith. The intercept and inclination of this function are close to bivariate normally distributed with mean values (SD) of 2.7° mm−1 (1.9) and −0.039° mm−1 (0.037), respectively. Inclination is less negative for wider annual rings (r = 0.3), and intercept and inclination are negatively correlated (r = −0.4). The constant rate of change indicates inherited property rather than influence of any dynamic, external stimulus. No predictor for grain angle pattern was found. The linear model leads to simplifications both when observing the grain angle in the forestry, and in calculations of strength properties and distortion in the timber industry.

Ort, förlag, år, upplaga, sidor
Oxford University Press, 2002. Vol. 75, nr 2, s. 163-170
Nyckelord [en]
change in grain angle, mature wood, Norway spruce, slope of grain, spiral grain
Nationell ämneskategori
Skogsvetenskap
Forskningsämne
Teknik, Skog och träteknik
Identifikatorer
URN: urn:nbn:se:lnu:diva-33836DOI: 10.1093/forestry/75.2.163OAI: oai:DiVA.org:lnu-33836DiVA, id: diva2:711650
Tillgänglig från: 2014-04-10 Skapad: 2014-04-10 Senast uppdaterad: 2017-12-05Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltext

Personposter BETA

Säll, Harald

Sök vidare i DiVA

Av författaren/redaktören
Säll, Harald
Av organisationen
Institutionen för industriella produktionssystem
I samma tidskrift
Forestry (London)
Skogsvetenskap

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 311 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf