The influence of basic density and growth ring width on the impact strength of Norway spruce wood from Southern and Northern Finland

Saranpää, Pekka

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Silva Fennica vol. 17 no. 4 article id 5199 | 1983 | Article

Pekka Saranpää

Puuaineen tiheyden ja vuosiluston leveyden vaikutus kuusen iskutaivutuslujuuteen Etelä- ja Pohjois-Suomessa.

Saranpää P. (1983). Puuaineen tiheyden ja vuosiluston leveyden vaikutus kuusen iskutaivutuslujuuteen Etelä- ja Pohjois-Suomessa. Silva Fennica vol. 17 no. 4 article id 5199. https://doi.org/10.14214/sf.a15182

English title: The influence of basic density and growth ring width on the impact strength of Norway spruce wood from Southern and Northern Finland

Abstract

Basic density and absorbed energy in impact bending were measured for 500 Norway spruce (Picea abies (L.) H. Karst.) samples from Northern and Southern Finland. Statistical analysis showed that the relationship between impact strength and basic density was significant and regression analysis showed that it was linear.

Furthermore, with constant density, the impact strength was higher in Northern than in Southern Finland. This was due to growth ring width: i.e. when density was kept constant the impact strength increased with decreasing growth ring width. In addition, when the growth ring width was kept constant, the basic density of wood was higher in Southern Finland than in Northern Finland.

The PDF includes a summary in English.

Original keywords
kuusi; alkuperä; lujuus; puuaineen tiheys; vuosiluston leveys; iskutaivutuslujuus

English keywords
Norway spruce; Picea abies; northern Finland; basic density; progeny; Southern Finland; growth ring width; impact strength

Published in 1983

Available at https://doi.org/10.14214/sf.a15182 | Download PDF

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