An experimental and numerical study of moisture transport and moisture-induced strain in fast-grown Sitka spruce

Abstract: The use of fast-grown timber in the manufacture of engineered wood products is increasing; however, the fast growth rate results in a low-density timber that is susceptible to significant swelling and shrinkage deformations under changing moisture content. The current study focuses on the...

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Autores principales:	O'Ceallaigh,Conan, Sikora,Karol, McPolin,Daniel, Harte,Annette M.
Lenguaje:	English
Publicado:	Universidad del Bío-Bío 2019
Materias:	Adsorption desorption finite element analysis glued laminated timber long-term moisture transport moisture diffusion.
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2019000100045
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spelling	oai:scielo:S0718-221X20190001000452019-06-04An experimental and numerical study of moisture transport and moisture-induced strain in fast-grown Sitka spruceO'Ceallaigh,ConanSikora,KarolMcPolin,DanielHarte,Annette M. Adsorption desorption finite element analysis glued laminated timber long-term moisture transport moisture diffusion. Abstract: The use of fast-grown timber in the manufacture of engineered wood products is increasing; however, the fast growth rate results in a low-density timber that is susceptible to significant swelling and shrinkage deformations under changing moisture content. The current study focuses on the characterisation of the moisture diffusion and swelling/shrinkage of fast-grown Sitka spruce and the prediction of the moisture-induced strain development in Sitka spruce glulam beams under variable humidity cycles. Moisture content evolution and swelling/shrinkage coefficients were measured and the longitudinal swelling/shrinkage was found to be significantly greater than for slow-grown timber. Sitka spruce glued-laminated beams were subjected to controlled relative humidity cycling for 52 weeks and the moisture distribution and moisture-induced strains were measured continuously. Coupled moisture-displacement numerical models, incorporating the experimentally measured material parameters were developed. The effect of the glue-line was found to have an insignificant effect on moisture transport, however, the material orientation greatly influenced the predicted moisture-induced strain. Accurately mapping the material orientation produced significantly better predictions of the experimental results over the 52-week period.info:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.21 n.1 20192019-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2019000100045en10.4067/S0718-221X2019005000105
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Adsorption desorption finite element analysis glued laminated timber long-term moisture transport moisture diffusion.
spellingShingle	Adsorption desorption finite element analysis glued laminated timber long-term moisture transport moisture diffusion. O'Ceallaigh,Conan Sikora,Karol McPolin,Daniel Harte,Annette M. An experimental and numerical study of moisture transport and moisture-induced strain in fast-grown Sitka spruce
description	Abstract: The use of fast-grown timber in the manufacture of engineered wood products is increasing; however, the fast growth rate results in a low-density timber that is susceptible to significant swelling and shrinkage deformations under changing moisture content. The current study focuses on the characterisation of the moisture diffusion and swelling/shrinkage of fast-grown Sitka spruce and the prediction of the moisture-induced strain development in Sitka spruce glulam beams under variable humidity cycles. Moisture content evolution and swelling/shrinkage coefficients were measured and the longitudinal swelling/shrinkage was found to be significantly greater than for slow-grown timber. Sitka spruce glued-laminated beams were subjected to controlled relative humidity cycling for 52 weeks and the moisture distribution and moisture-induced strains were measured continuously. Coupled moisture-displacement numerical models, incorporating the experimentally measured material parameters were developed. The effect of the glue-line was found to have an insignificant effect on moisture transport, however, the material orientation greatly influenced the predicted moisture-induced strain. Accurately mapping the material orientation produced significantly better predictions of the experimental results over the 52-week period.
author	O'Ceallaigh,Conan Sikora,Karol McPolin,Daniel Harte,Annette M.
author_facet	O'Ceallaigh,Conan Sikora,Karol McPolin,Daniel Harte,Annette M.
author_sort	O'Ceallaigh,Conan
title	An experimental and numerical study of moisture transport and moisture-induced strain in fast-grown Sitka spruce
title_short	An experimental and numerical study of moisture transport and moisture-induced strain in fast-grown Sitka spruce
title_full	An experimental and numerical study of moisture transport and moisture-induced strain in fast-grown Sitka spruce
title_fullStr	An experimental and numerical study of moisture transport and moisture-induced strain in fast-grown Sitka spruce
title_full_unstemmed	An experimental and numerical study of moisture transport and moisture-induced strain in fast-grown Sitka spruce
title_sort	experimental and numerical study of moisture transport and moisture-induced strain in fast-grown sitka spruce
publisher	Universidad del Bío-Bío
publishDate	2019
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2019000100045
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An experimental and numerical study of moisture transport and moisture-induced strain in fast-grown Sitka spruce

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