ANISOTROPY IN THE THERMAL EXPANSION AND COMPRESSION STRENGTH OF THREE WOOD SPECIES FROM PLANTATIONS
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Cerne (Online) |
Texto Completo: | https://cerne.ufla.br/site/index.php/CERNE/article/view/2404 |
Resumo: | The objective of this study was to evaluate the anisotropy on dimensional changes and the compression behavior of three wood species from commercial plantations (Eucalyptus nitens, Tectona grandis and Gmelina arborea) generated by a thermal treatment. To accomplish the goal, dilatometric tests and compression tests were performed in the three main directions of wood: tangential, radial and longitudinal. It was found a high anisotropy on coefficients of linear thermal expansion (CTE) and on compression tests for the three main directions considered of the wood. The values in the longitudinal direction were close to zero. The values in the tangential direction were higher than in the radial direction. In terms of mechanical resistance, the longitudinal direction showed the highest strength. The radial strength was slightly higher than the tangential. Thermal treatment increased the strength to compression and the resistance to deformation in the elastic region. The modulus of elasticity increased up to 30.9%, the stress at proportional limit up to 27.3% and the modulus of rupture up to 30.3%, in the longitudinal direction. It was found that thermal treatment had a higher effect on the mechanical properties of lower density wood. Contrary, the mass loss increased for this wood, finding values around twice than those obtained for the denser wood. |
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ANISOTROPY IN THE THERMAL EXPANSION AND COMPRESSION STRENGTH OF THREE WOOD SPECIES FROM PLANTATIONSaxes of wood;thermal treatment;dilatometry;mechanical strengthThe objective of this study was to evaluate the anisotropy on dimensional changes and the compression behavior of three wood species from commercial plantations (Eucalyptus nitens, Tectona grandis and Gmelina arborea) generated by a thermal treatment. To accomplish the goal, dilatometric tests and compression tests were performed in the three main directions of wood: tangential, radial and longitudinal. It was found a high anisotropy on coefficients of linear thermal expansion (CTE) and on compression tests for the three main directions considered of the wood. The values in the longitudinal direction were close to zero. The values in the tangential direction were higher than in the radial direction. In terms of mechanical resistance, the longitudinal direction showed the highest strength. The radial strength was slightly higher than the tangential. Thermal treatment increased the strength to compression and the resistance to deformation in the elastic region. The modulus of elasticity increased up to 30.9%, the stress at proportional limit up to 27.3% and the modulus of rupture up to 30.3%, in the longitudinal direction. It was found that thermal treatment had a higher effect on the mechanical properties of lower density wood. Contrary, the mass loss increased for this wood, finding values around twice than those obtained for the denser wood.CERNECERNE2020-08-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://cerne.ufla.br/site/index.php/CERNE/article/view/2404CERNE; Vol 26 No 2 (2020); 256-264CERNE; Vol 26 No 2 (2020); 256-2642317-63420104-7760reponame:Cerne (Online)instname:Universidade Federal de Lavras (UFLA)instacron:UFLAenghttps://cerne.ufla.br/site/index.php/CERNE/article/view/2404/1193Copyright (c) 2020 CERNEinfo:eu-repo/semantics/openAccessOlmos, Luis2020-08-19T01:34:14Zoai:cerne.ufla.br:article/2404Revistahttps://cerne.ufla.br/site/index.php/CERNEPUBhttps://cerne.ufla.br/site/index.php/CERNE/oaicerne@dcf.ufla.br||cerne@dcf.ufla.br2317-63420104-7760opendoar:2024-05-21T19:54:44.717608Cerne (Online) - Universidade Federal de Lavras (UFLA)true |
dc.title.none.fl_str_mv |
ANISOTROPY IN THE THERMAL EXPANSION AND COMPRESSION STRENGTH OF THREE WOOD SPECIES FROM PLANTATIONS |
title |
ANISOTROPY IN THE THERMAL EXPANSION AND COMPRESSION STRENGTH OF THREE WOOD SPECIES FROM PLANTATIONS |
spellingShingle |
ANISOTROPY IN THE THERMAL EXPANSION AND COMPRESSION STRENGTH OF THREE WOOD SPECIES FROM PLANTATIONS Olmos, Luis axes of wood; thermal treatment; dilatometry; mechanical strength |
title_short |
ANISOTROPY IN THE THERMAL EXPANSION AND COMPRESSION STRENGTH OF THREE WOOD SPECIES FROM PLANTATIONS |
title_full |
ANISOTROPY IN THE THERMAL EXPANSION AND COMPRESSION STRENGTH OF THREE WOOD SPECIES FROM PLANTATIONS |
title_fullStr |
ANISOTROPY IN THE THERMAL EXPANSION AND COMPRESSION STRENGTH OF THREE WOOD SPECIES FROM PLANTATIONS |
title_full_unstemmed |
ANISOTROPY IN THE THERMAL EXPANSION AND COMPRESSION STRENGTH OF THREE WOOD SPECIES FROM PLANTATIONS |
title_sort |
ANISOTROPY IN THE THERMAL EXPANSION AND COMPRESSION STRENGTH OF THREE WOOD SPECIES FROM PLANTATIONS |
author |
Olmos, Luis |
author_facet |
Olmos, Luis |
author_role |
author |
dc.contributor.author.fl_str_mv |
Olmos, Luis |
dc.subject.por.fl_str_mv |
axes of wood; thermal treatment; dilatometry; mechanical strength |
topic |
axes of wood; thermal treatment; dilatometry; mechanical strength |
description |
The objective of this study was to evaluate the anisotropy on dimensional changes and the compression behavior of three wood species from commercial plantations (Eucalyptus nitens, Tectona grandis and Gmelina arborea) generated by a thermal treatment. To accomplish the goal, dilatometric tests and compression tests were performed in the three main directions of wood: tangential, radial and longitudinal. It was found a high anisotropy on coefficients of linear thermal expansion (CTE) and on compression tests for the three main directions considered of the wood. The values in the longitudinal direction were close to zero. The values in the tangential direction were higher than in the radial direction. In terms of mechanical resistance, the longitudinal direction showed the highest strength. The radial strength was slightly higher than the tangential. Thermal treatment increased the strength to compression and the resistance to deformation in the elastic region. The modulus of elasticity increased up to 30.9%, the stress at proportional limit up to 27.3% and the modulus of rupture up to 30.3%, in the longitudinal direction. It was found that thermal treatment had a higher effect on the mechanical properties of lower density wood. Contrary, the mass loss increased for this wood, finding values around twice than those obtained for the denser wood. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-08-12 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://cerne.ufla.br/site/index.php/CERNE/article/view/2404 |
url |
https://cerne.ufla.br/site/index.php/CERNE/article/view/2404 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://cerne.ufla.br/site/index.php/CERNE/article/view/2404/1193 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2020 CERNE info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2020 CERNE |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
CERNE CERNE |
publisher.none.fl_str_mv |
CERNE CERNE |
dc.source.none.fl_str_mv |
CERNE; Vol 26 No 2 (2020); 256-264 CERNE; Vol 26 No 2 (2020); 256-264 2317-6342 0104-7760 reponame:Cerne (Online) instname:Universidade Federal de Lavras (UFLA) instacron:UFLA |
instname_str |
Universidade Federal de Lavras (UFLA) |
instacron_str |
UFLA |
institution |
UFLA |
reponame_str |
Cerne (Online) |
collection |
Cerne (Online) |
repository.name.fl_str_mv |
Cerne (Online) - Universidade Federal de Lavras (UFLA) |
repository.mail.fl_str_mv |
cerne@dcf.ufla.br||cerne@dcf.ufla.br |
_version_ |
1799874944157351936 |