Modelling the hygrothermal stress in curved glulam beams

Variations of relative humidity and temperature result in moisture and temperature gradients in wood, which induce stress perpendicular to grain and may even cause cracking of the wood. To address the problem, a sequentially coupled three-dimensional (3D) finite element procedure was developed for i...

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Bibliographic Details
Published in:Journal of strain analysis for engineering design 2010-02, Vol.45 (2), p.129-140
Main Authors: Zhou, H Z, Zhu, E C, Fortino, S, Toratti, T
Format: Article
Language:English
Subjects:
Beams (structural)
Design engineering
Engineering
Glulam
Moisture
Relative humidity
Stress analysis
Stresses
Three dimensional
Wood
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Summary:Variations of relative humidity and temperature result in moisture and temperature gradients in wood, which induce stress perpendicular to grain and may even cause cracking of the wood. To address the problem, a sequentially coupled three-dimensional (3D) finite element procedure was developed for investigation of hygrothermal stress in glulam beams, in which moisture and heat transfer were taken into consideration, and the hygrothermal deformation, creep, and mechanosorption were also included. The moisture content, temperature, and stress distributions in glulam beams were modelled successfully. The study provides insight into the mechanism of hygrothermal stress in glulam and also provides useful reference to the design of glulam structures and the design of lamina stacking sequence in production of glulam.
ISSN:0309-3247
2041-3130
DOI:10.1243/03093247JSA563