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Ultrasound to estimate the physical-mechanical properties of tropical wood species grown in an agroforestry system

  • Adriano Reis Prazeres Mascarenhas ORCID logo , Rafael Rodolfo de Melo ORCID logo , Alexandre Santos Pimenta ORCID logo EMAIL logo , Diego Martins Stangerlin ORCID logo , Fernando Luiz de Oliveira Corrêa ORCID logo , Marta Silvana Volpato Sccoti ORCID logo and Edgley Alves de Oliveira Paula ORCID logo
Published/Copyright: June 24, 2021
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Holzforschung
From the journal Holzforschung Volume 75 Issue 10

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.

Keywords: linear regression; mechanical properties; nondestructive evaluation; physical properties; tropical wood
Corresponding author: Alexandre Santos Pimenta, Forest Engineering Department, Agricultural Sciences Academic Unit, Federal University of Rio Grande do Norte – UFRN, RN-160, Km 03, District of Jundiaí, Macaíba, RN, CEP 59280-000, Brazil, E-mail:

Funding source: Executive Commission for Cocoa Crop Planning (CEPLAC)

Acknowledgments

We thank Federal University of Rondônia and Federal University of Mato Grosso for providing infrastructure and technical personnel.

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: We are especially grateful to the Executive Commission for Cocoa Crop Planning (CEPLAC) for financial support and for providing the study material and infrastructure. We would also like to thank the financial support of the National Council for Scientific and Technological Development (CNPQ) for carrying out this research.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2020-11-29
Accepted: 2021-03-02
Published Online: 2021-06-24
Published in Print: 2021-10-26

© 2021 Walter de Gruyter GmbH, Berlin/Boston

Articles in the same Issue

  1. Frontmatter
  2. Original articles
  3. Ultrasound to estimate the physical-mechanical properties of tropical wood species grown in an agroforestry system
  4. Natural durability and improved resistance of 20 Amazonian wood species after 30 years in ground contact
  5. Cellular-level chemical changes in Japanese beech (Fagus crenata Blume) during artificial weathering
  6. Evaluation of water related properties of birch wood products modified with different molecular weight phenol-formaldehyde oligomers
  7. Superhydrophobic wood surface fabricated by Cu2O nano-particles and stearic acid: its acid/alkali and wear resistance
  8. Dynamic strength properties and structural integrity of wood modified with cyclic N-methylol and N-methyl compounds
  9. Indoor storage time affects the quality and quantity of volatile monoterpenes emitted from softwood timber
  10. The impact of acid hydrolysis conditions on carbohydrate determination in lignocellulosic materials: a case study with Eucalyptus globulus bark
  11. Improved chemical pulping and saccharification of a natural mulberry mutant deficient in cinnamyl alcohol dehydrogenase
https://doi.org/10.1515/hf-2020-0249
Keywords for this article
linear regression; mechanical properties; nondestructive evaluation; physical properties; tropical wood

Articles in the same Issue

  1. Frontmatter
  2. Original articles
  3. Ultrasound to estimate the physical-mechanical properties of tropical wood species grown in an agroforestry system
  4. Natural durability and improved resistance of 20 Amazonian wood species after 30 years in ground contact
  5. Cellular-level chemical changes in Japanese beech (Fagus crenata Blume) during artificial weathering
  6. Evaluation of water related properties of birch wood products modified with different molecular weight phenol-formaldehyde oligomers
  7. Superhydrophobic wood surface fabricated by Cu2O nano-particles and stearic acid: its acid/alkali and wear resistance
  8. Dynamic strength properties and structural integrity of wood modified with cyclic N-methylol and N-methyl compounds
  9. Indoor storage time affects the quality and quantity of volatile monoterpenes emitted from softwood timber
  10. The impact of acid hydrolysis conditions on carbohydrate determination in lignocellulosic materials: a case study with Eucalyptus globulus bark
  11. Improved chemical pulping and saccharification of a natural mulberry mutant deficient in cinnamyl alcohol dehydrogenase
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