Resonance of scantlings indicates the stiffness even of small specimens of Eucalyptus from plantations
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The aim of this study was to establish the relationship between the stiffness of scantlings, approaching structural size materials, and small specimens of 6-year-old Eucalyptus urophylla × grandis wood using a resonance technique. The correlation between the elastic modulus (E) of the scantlings in longitudinal vibration and small specimens in flexural vibration was r = 75 when comparing the scantling values with the averaged values of the specimens per scantling. However, when the E of each single specimen was compared with its respective scantling, the coefficient of correlation decreased to r = 0.64 in the longitudinal tests and r = 0.61 in the flexural tests. A roughly linear correlation (r = 0.59) between specific modulus and loss tangent was obtained for the small specimens of Eucalyptus. In short, the resonance technique rapidly provided a large, accurate data set of mechanical wood properties as required for high-throughput phenotyping in recent genetic studies.
KeywordsEucalyptus Loss Tangent Wood Sample Dynamic Test Small Specimen
The authors express their special thanks to the CENIBRA for providing vegetal material and to the Department of Wood Science and Technology (Prof. P. F. Trugilho and Prof. J. R. M. da Silva) of the Universidade Federal de Lavras (UFLA, Brazil) for supporting the experimental work. We thank particularly José Francisco de Sousa, Carlos Henrique da Silva, Heber Alvarenga, and Hernani Alves for their technical support. This project was funded by CENIBRA (Celulose Nipo-Brasileira), CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico, Brazil), and CIRAD (AGAP and UR40). P.R.G. Hein was supported by CNPq (process no. 200970/2008-9).
Conflict of interest
We have no financial relationship with CENIBRA and CNPq, which sponsored this study. We declare that we have no conflict of interest.
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