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vol.39 número3ESTUDO DA RELAÇÃO ENTRE CONDIÇÕES DE POLPAÇÃO E PROPRIEDADES FÍSICO-MECÂNICAS DO PAPEL índice de autoresíndice de assuntospesquisa de artigos
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Revista Árvore

versão impressa ISSN 0100-6762versão On-line ISSN 1806-9088

Resumo

DELUCIS, Rafael de Avila et al. ANALYSIS OF LONGITUDINAL RESIDUAL STRAIN AND ITS RELATION TO TECHNOLOGICAL PROPERTIES OF BLACK WATTLE WOOD. Rev. Árvore [online]. 2015, vol.39, n.3, pp.585-594. ISSN 1806-9088.  https://doi.org/10.1590/0100-67622015000300020.

The black wattle wood has been used in niches that confer low value to this material. Therefore, this study aimed to analyze the longitudinal residual strain (LRS) and its relations with Acacia mearnsii de wild wood properties. To achieve this, 60 trees with 4 and 7 years were selected from a forest population located in Piratini, RS. Diameter at breast height (1.3 m; DBH), bark thickness (BT) and commercial height (h) were evaluated. The physical properties evaluated were specific gravity (ρ) and moisture content on dry basis (Tu). The propagation time of ultrasonic wave was determined as described in NBR 15521 and then the dynamic modulus of elasticity (Ed) was measured. The mechanical properties was evaluated according to D143-94 standard by static bending, parallel compression to fibers and Janka hardness tests. The LRS and its relations with the wood properties were similar to the results found in the literature for wood fromEucalyptus species. However, in magnitude, these levels were sensibly lower, givingblack wattleindication to produce solid wood products, when it comes to this quality parameter.

Palavras-chave : CIRAD-Forêt; Growth stresses; Wood quality.

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