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Resonance of scantlings indicates the stiffness even of small specimens of Eucalyptus from plantations |
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| Authors: | Paulo Ricardo Gherardi Hein José Tarcísio Lima Joseph Gril Ant?nio Marcos Rosado Lo?c Brancheriau |
| Institution: | 1. CIRAD—PERSYST Department, Production and Processing of Tropical Woods, 73 rue Jean-Fran?ois Breton TA B-40/16, 34398, Montpellier, Cedex 5, France 2. Ciência e Tecnologia da Madeira—Departamento de Ciências Florestais, Universidade Federal de Lavras—campus universitário, Lavras, Minas Gerais, CEP 37200-000, Brazil 3. Laboratoire de Mecanique et Genie Civil, CNRS-Université Montpellier 2, Place E. Bataillon, cc 048 34095, Montpellier Cedex 5, France 4. Celulose Nipo-Brasileira S.A, Rodovia BR 381, Km 172, Belo Oriente, Minas Gerais, CEP 35196-000, Brazil |
| Abstract: | 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. |
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