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- Title
Ultrasound to estimate the physical-mechanical properties of tropical wood species grown in an agroforestry system.
- Authors
Mascarenhas, Adriano Reis Prazeres; Melo, Rafael Rodolfo de; Santos Pimenta, Alexandre; Stangerlin, Diego Martins; Corrêa, Fernando Luiz de Oliveira; Sccoti, Marta Silvana Volpato; Paula, Edgley Alves de Oliveira
- Abstract
The great diversity of tropical wood species makes it difficult to obtain information about their technological properties. The present work employed ultrasound to estimate the physical and mechanical properties of four wood species: African mahogany (Khaya senegalensis), 'freijó' (Cordia goeldiana), 'paricá' (Schizolobium amazonicum), and teak (Tectona grandis). Nineteen-year-old adult trees were selected and harvested from an agroforestry system (AFS) located in the Brazilian Amazon. From the harvested trees, 1.5 m logs were sawn and test specimens were obtained for physical-mechanical assays. The ultrasound propagation speed (V0) and the dynamic modulus of elasticity (Ed) were obtained from applying ultrasound longitudinally in wood samples. Values of V0 decreased from the lightest wood (paricá) to the heaviest (African mahogany), and Ed presented the opposite behavior. For the physical properties, the coefficient of determination (R2) ranged from 12 to 35% and the best linear regression models were fitted for the basic density, having V0 and Ed as independent variables. For the mechanical properties, the values of R2 varied from 18 to 63% and higher correlations were found between parallel-to-grain compression strength and Ed, and rigidity, static bending and Ed. Ultrasound presented the potential to estimate the properties of tropical wood species from the ASF.
- Subjects
ULTRASONIC imaging; MODULUS of elasticity; AGROFORESTRY; TEAK; FORESTS &; forestry; ADULTS
- Publication
Holzforschung: International Journal of the Biology, Chemistry, Physics, & Technology of Wood, 2021, Vol 75, Issue 10, p879
- ISSN
0018-3830
- Publication type
Article
- DOI
10.1515/hf-2020-0249