Scaling and modeling the creep of Eucalyptus globulus

Abstract: Eucalyptus, with the commercial name of Blue gum, is a viscoelastic material strongly influenced when under constant load (Creep), being this phenomenon - in the context of displacements - exacerbated with transient relative humidity (variations of the water content in the wood material)....

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Autores principales:	Lopes,Duarte Barroso, Matos,João Emílio
Lenguaje:	English
Publicado:	Universidad del Bío-Bío 2019
Materias:	Blue gum creep limit eucalyptus mechano-sorption model test
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2019000200249
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spelling	oai:scielo:S0718-221X20190002002492019-06-04Scaling and modeling the creep of Eucalyptus globulusLopes,Duarte BarrosoMatos,João Emílio Blue gum creep limit eucalyptus mechano-sorption model test Abstract: Eucalyptus, with the commercial name of Blue gum, is a viscoelastic material strongly influenced when under constant load (Creep), being this phenomenon - in the context of displacements - exacerbated with transient relative humidity (variations of the water content in the wood material). The evaluation of bending creep was done in indoor / constant and transient humidity conditions. In the latter, mechano-sorptive effect, the creep bending tests were done for a period of 60 days with cycles of wetting-and-drying. Each cycle has 7 days of duration. Defect free specimens with dimensions of 20 x 20 x 400 mm3 (approximately to the scale 1:10) of Eucalyptus globulus. wood species were used. To fit the creep behaviour and extrapolate results for different periods (1, 10 and 50 years) a survey of different numerical models was done. Rational, parabolic and polynomial functions were chosen. In bending, Blue gum wood species presented a behaviour without a creep limit, therefore labile. Through the models used for extrapolations a significant variability was found for different periods. Values of the main standard of wood design (Eurocode 5) were exceeded. The most consistent mathematical model was the rational model because it is the one that has led to closer and stable results.info:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.21 n.2 20192019-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2019000200249en10.4067/S0718-221X2019005000212
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Blue gum creep limit eucalyptus mechano-sorption model test
spellingShingle	Blue gum creep limit eucalyptus mechano-sorption model test Lopes,Duarte Barroso Matos,João Emílio Scaling and modeling the creep of Eucalyptus globulus
description	Abstract: Eucalyptus, with the commercial name of Blue gum, is a viscoelastic material strongly influenced when under constant load (Creep), being this phenomenon - in the context of displacements - exacerbated with transient relative humidity (variations of the water content in the wood material). The evaluation of bending creep was done in indoor / constant and transient humidity conditions. In the latter, mechano-sorptive effect, the creep bending tests were done for a period of 60 days with cycles of wetting-and-drying. Each cycle has 7 days of duration. Defect free specimens with dimensions of 20 x 20 x 400 mm3 (approximately to the scale 1:10) of Eucalyptus globulus. wood species were used. To fit the creep behaviour and extrapolate results for different periods (1, 10 and 50 years) a survey of different numerical models was done. Rational, parabolic and polynomial functions were chosen. In bending, Blue gum wood species presented a behaviour without a creep limit, therefore labile. Through the models used for extrapolations a significant variability was found for different periods. Values of the main standard of wood design (Eurocode 5) were exceeded. The most consistent mathematical model was the rational model because it is the one that has led to closer and stable results.
author	Lopes,Duarte Barroso Matos,João Emílio
author_facet	Lopes,Duarte Barroso Matos,João Emílio
author_sort	Lopes,Duarte Barroso
title	Scaling and modeling the creep of Eucalyptus globulus
title_short	Scaling and modeling the creep of Eucalyptus globulus
title_full	Scaling and modeling the creep of Eucalyptus globulus
title_fullStr	Scaling and modeling the creep of Eucalyptus globulus
title_full_unstemmed	Scaling and modeling the creep of Eucalyptus globulus
title_sort	scaling and modeling the creep of eucalyptus globulus
publisher	Universidad del Bío-Bío
publishDate	2019
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2019000200249
work_keys_str_mv	AT lopesduartebarroso scalingandmodelingthecreepofeucalyptusglobulus AT matosjoaoemilio scalingandmodelingthecreepofeucalyptusglobulus
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Scaling and modeling the creep of Eucalyptus globulus

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