Correlations among microfibril angle, density, modulus of elasticity, modulus of rupture and shrinkage in 6-year-old Eucalyptus urophylla × E. grandis

The cellulose microfibril angle (MFA) in the cell wall is known to have major effects on wood stiffness and shrinkage. However, its influence on juvenile wood traits is not fully understood, especially in Eucalyptus. The aim of this study was to evaluate the relationships among MFA, density (&#9...

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Autores principales:	Hein,P.R.G, Silva,J.R.M, Brancheriau,L
Lenguaje:	English
Publicado:	Universidad del Bío-Bío 2013
Materias:	Eucalyptus microfibril angle x-ray diffraction dynamic modulus modulus of rupture
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2013000200004
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spelling	oai:scielo:S0718-221X20130002000042014-07-14Correlations among microfibril angle, density, modulus of elasticity, modulus of rupture and shrinkage in 6-year-old Eucalyptus urophylla × E. grandisHein,P.R.GSilva,J.R.MBrancheriau,L Eucalyptus microfibril angle x-ray diffraction dynamic modulus modulus of rupture The cellulose microfibril angle (MFA) in the cell wall is known to have major effects on wood stiffness and shrinkage. However, its influence on juvenile wood traits is not fully understood, especially in Eucalyptus. The aim of this study was to evaluate the relationships among MFA, density (ρ), dynamic modulus of elasticity (E), modulus of rupture (MOR), and shrinkage (δ) in 6-year-old Eucalyptus urophylla × E. grandis. Small clear specimens (L 410 mm x R 25 mm x T 25 mm) were cut from central boards for the determination of E and MOR. Cubic samples (25 mm³) were removed after the dynamic and static tests to evaluate ρ and δ. MFA was finally measured by X-ray diffraction on small strips coming from the cubic samples. A quasi-absence of statistical link was found for MFA - δ and MFA - ρ (R²<0.20). The parameter ρ/MFA was used to estimate E (R²=0.66) and MOR (R²=0.37). In a next step, the additive and interaction effects were investigated using multiple linear regressions with a forward selection method. The property E was found to be linked only with the additive effects of ρ and 1/MFA (R²=0.76). The additive and interaction effects were all significant for MOR (R²=0.54). This study showed that a general model including both additive and interaction effects should be used for the prediction of the modulus of elasticity and the modulus of rupture.info:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.15 n.2 20132013-08-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2013000200004en10.4067/S0718-221X2013005000014
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Eucalyptus microfibril angle x-ray diffraction dynamic modulus modulus of rupture
spellingShingle	Eucalyptus microfibril angle x-ray diffraction dynamic modulus modulus of rupture Hein,P.R.G Silva,J.R.M Brancheriau,L Correlations among microfibril angle, density, modulus of elasticity, modulus of rupture and shrinkage in 6-year-old Eucalyptus urophylla × E. grandis
description	The cellulose microfibril angle (MFA) in the cell wall is known to have major effects on wood stiffness and shrinkage. However, its influence on juvenile wood traits is not fully understood, especially in Eucalyptus. The aim of this study was to evaluate the relationships among MFA, density (ρ), dynamic modulus of elasticity (E), modulus of rupture (MOR), and shrinkage (δ) in 6-year-old Eucalyptus urophylla × E. grandis. Small clear specimens (L 410 mm x R 25 mm x T 25 mm) were cut from central boards for the determination of E and MOR. Cubic samples (25 mm³) were removed after the dynamic and static tests to evaluate ρ and δ. MFA was finally measured by X-ray diffraction on small strips coming from the cubic samples. A quasi-absence of statistical link was found for MFA - δ and MFA - ρ (R²<0.20). The parameter ρ/MFA was used to estimate E (R²=0.66) and MOR (R²=0.37). In a next step, the additive and interaction effects were investigated using multiple linear regressions with a forward selection method. The property E was found to be linked only with the additive effects of ρ and 1/MFA (R²=0.76). The additive and interaction effects were all significant for MOR (R²=0.54). This study showed that a general model including both additive and interaction effects should be used for the prediction of the modulus of elasticity and the modulus of rupture.
author	Hein,P.R.G Silva,J.R.M Brancheriau,L
author_facet	Hein,P.R.G Silva,J.R.M Brancheriau,L
author_sort	Hein,P.R.G
title	Correlations among microfibril angle, density, modulus of elasticity, modulus of rupture and shrinkage in 6-year-old Eucalyptus urophylla × E. grandis
title_short	Correlations among microfibril angle, density, modulus of elasticity, modulus of rupture and shrinkage in 6-year-old Eucalyptus urophylla × E. grandis
title_full	Correlations among microfibril angle, density, modulus of elasticity, modulus of rupture and shrinkage in 6-year-old Eucalyptus urophylla × E. grandis
title_fullStr	Correlations among microfibril angle, density, modulus of elasticity, modulus of rupture and shrinkage in 6-year-old Eucalyptus urophylla × E. grandis
title_full_unstemmed	Correlations among microfibril angle, density, modulus of elasticity, modulus of rupture and shrinkage in 6-year-old Eucalyptus urophylla × E. grandis
title_sort	correlations among microfibril angle, density, modulus of elasticity, modulus of rupture and shrinkage in 6-year-old eucalyptus urophylla × e. grandis
publisher	Universidad del Bío-Bío
publishDate	2013
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2013000200004
work_keys_str_mv	AT heinprg correlationsamongmicrofibrilangledensitymodulusofelasticitymodulusofruptureandshrinkagein6yearoldeucalyptusurophyllaegrandis AT silvajrm correlationsamongmicrofibrilangledensitymodulusofelasticitymodulusofruptureandshrinkagein6yearoldeucalyptusurophyllaegrandis AT brancheriaul correlationsamongmicrofibrilangledensitymodulusofelasticitymodulusofruptureandshrinkagein6yearoldeucalyptusurophyllaegrandis
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Correlations among microfibril angle, density, modulus of elasticity, modulus of rupture and shrinkage in 6-year-old Eucalyptus urophylla × E. grandis

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