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dc.contributor.authorO'Ceallaigh, Conan
dc.contributor.authorSikora, Karol
dc.contributor.authorMcPolin, Daniel
dc.contributor.authorHarte, Annette M.
dc.identifier.citationO'Ceallaigh, Conan, Sikora, Karol, McPolin, Daniel, & Harte, Annette M. (2019). An experimental and numerical study of moisture flow and moisture-induced strain in fast-grown Sitka spruce. Maderas: Ciencia y tecnologia, 21(1), 45-64. doi: 10.4067/S0718-221X2019005000105en_IE
dc.description.abstractThe 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 moisturedisplacement 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. Keywords: Adsorption,en_IE
dc.description.sponsorshipThis work has been carried out as part of the project entitled ‘Innovation in Irish timber Usage’ (project ref. 11/C/207) funded by the Department of Agriculture, Food and the Marine of the Republic of Ireland under the FIRM/RSF/COFORD scheme. The authors would also like to thank ECC Ltd. (Earrai Coillte Chonnacht Teoranta) for supplying all the timber used in this project. The contribution of the technical staff of the College of Engineering and Informatics, NUIG, in particular, Peter Fahy, Colm Walsh and Gerrard Hynes, is acknowledgeden_IE
dc.publisherDepartamento de Ingeniería en Maderas de la Universidad del Bio-Bio en Concepción, Chileen_IE
dc.relation.ispartofMaderas: ciencia y tecnologiaen
dc.subjectFinite element analysisen_IE
dc.subjectGlued laminated timberen_IE
dc.subjectLong-term moisture transporten_IE
dc.subjectMoisture diffusionen_IE
dc.titleAn experimental and numerical study of moisture flow and moisture-induced strain in fast-grown Sitka spruceen_IE
dc.contributor.funderDepartment of Agriculture, Food and the Marineen_IE
dc.local.contactAnnette M. Harte, Dept. Of Civil Engineering, Civil Engineering Building, Nui Galway. 2732 Email:

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