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Swelling pressure of semi-isostatically densified wood under different mechanical restraints
Högskolan Dalarna, Akademin Industri och samhälle, Skog- och träteknik.
Högskolan Dalarna, Akademin Industri och samhälle, Skog- och träteknik.
2007 (Engelska)Ingår i: Wood Science and Technology, ISSN 0043-7719, E-ISSN 1432-5225, Vol. 41, nr 5, s. 401-415Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Semi-isostatically densified and native wood samples of Scots pine and European birch were soaked in water. The swelling coefficients as well as the swelling pressure, that arose when the specimens were restrained in some way prior to the swelling, were measured using a universal testing machine equipped with a high resolution load-cell and an external extensometer. As densified wood swells, the native structure is almost restored and the swelling pressure became twice as high as for native wood in the most compressed directions (radial for pine and birch). That cell-shape recovery increases the swelling pressure can explain the problems with imbalance in laminated constructions where densified wood is used. The possibility to predict the swelling pressure from basic material properties was evaluated. The correlations between swelling pressure and material properties were strong enough to yield good predictive models.

Ort, förlag, år, upplaga, sidor
2007. Vol. 41, nr 5, s. 401-415
Nationell ämneskategori
Trävetenskap
Identifikatorer
URN: urn:nbn:se:du-17617DOI: 10.1007/s00226-006-0118-1ISI: 000247392600002OAI: oai:DiVA.org:du-17617DiVA, id: diva2:815707
Tillgänglig från: 2015-06-01 Skapad: 2015-06-01 Senast uppdaterad: 2017-12-04Bibliografiskt granskad

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Persson, Bengt
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