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Utjecaj juvenilnosti smrekovine na uzdužno savijanje uslojenih elemenata = Influence of juvenile spruce-wood on longitudinal deformations of laminated wood elementsČadež, Janez, 1968- ; Resnik, Jože, 1942- ; Košmelj, KatarinaAxial swelling and shrinking of wood is affected, among other influences, by the microfibril angle which is, as indicated in the literature, the greatest in the youngest, juvenile wood. The ... microfibril angle decreases with the age of a tree, and reaches the lowest values in the adult, mature wood. Since axial shrinking and swelling correlates positively with the age of wood, the combining of wood of different age in gluing of laminated parts may cause longitudinal bowing and warping of elements. An example may be found in window production. The deformations are expected to be larger with the greater differences in the age of lamellae that are glued together. The investigation of the effect of the different age of lamellae on dimensional stability of laminated elements was performed on spruce pieces (Picea abies Karst.) that were symmetrically glued using PVA adhesive. Each element consisted of two lamellae of the wood of same age or of different ages of juvenile wood (5, 15 or 25 years) or adult wood (40 years). After gluing the elements were conditioned in normal (Ž=65%, t=22,5°C), humid (Ž=90-92%, t=22,5°C) or dry climate (Ž=33-34%, t=20°C. Bowing during changes in climate conditions was measured by a laser device and determined as a height of the arch chord of theconcave or convex deformation.Source: Drvna industrija : Znanstveno stručni časopis za pitanja drvne tehnologije : Scientific and professional journal of wood technology. - ISSN 0012-6772 (53, 4, 2002, str. 189-195)Type of material - article, component partPublish date - 2002Language - croatianCOBISS.SI-ID - 1117065
Author
Čadež, Janez, 1968- |
Resnik, Jože, 1942- |
Košmelj, Katarina
Topics
juvenilni les |
adultni les |
smrekovina |
PVAc lepilo |
lepljenje lesa |
lepljenje lesa |
juvenile wood |
adult wood |
spruce wood |
PVA adhesive |
gluing
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DRS, in which the journal is indexed
Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Čadež, Janez, 1968- | 21484 |
Resnik, Jože, 1942- | 06324 |
Košmelj, Katarina | 09085 |
Source: Personal bibliographies
and: SICRIS
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