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Numerical analysis of moisture induced strains and stresses in glued-laminated timber
Huč, Sabina (Avtor), Svensson, Staffan (Avtor), Hozjan, Tomaž (Avtor)

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URLURL - Izvorni URL, za dostop obiščite https://www.degruyter.com/view/j/hfsg.ahead-of-print/hf-2019-0025/hf-2019-0025.xml?format=INT Povezava se odpre v novem oknu

Izvleček
Changes in relative humidity of the ambient air, RH (%), cause wetting and drying of wood material, which results in non-uniform moisture contents or moisture gradients, and consequently in moisture-induced stresses and strains in the glued-laminated timber (glulam) members. The aim of the present paper is to perform a hygro-mechanical analysis to predict the mechanical behavior of glulam specimens exposed to two RH regimes, causing wetting from 50% to 90% RH and drying from 90% to 50% RH, and compare the numerical to the experimental results. The aims are also to quantitatively analyze the influence of characteristic material parameters required in the multi-Fickian moisture transport model and the mechanical model on moisture-induced strains and stresses in glulam specimens and to determine the possibility of cracking of the material by analyzing the maximum tensile stresses perpendicular to the grain. Accurate numerical predictions of moisture contents and moisture-induced strains are obtained in the glulam specimens during wetting and drying as compared to the experimental results. The influence of a particular characteristic material parameter on moisture-induced strains and stresses is characterized as significant, but not crucial when a rough numerical estimation of the mechanical behavior of the glulam beam exposed to RH changes is required.

Jezik:Angleški jezik
Ključne besede:mechanical model, mechano-sorption, multi-Fickian moisture transport model, rheology, tensile stress perpendicular to the grain, wood
Vrsta gradiva:Znanstveno delo (r2)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FGG - Fakulteta za gradbeništvo in geodezijo
Leto izida:2019
Založnik:De Gruyter
Št. strani:str. 1-13
UDK:624.04
ISSN pri članku:0018-3830
DOI:10.1515/hf-2019-0025 Povezava se odpre v novem oknu
COBISS.SI-ID:8965217 Povezava se odpre v novem oknu
Licenca:CC BY-NC-ND 4.0
To delo je dosegljivo pod licenco Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
Število ogledov:137
Število prenosov:32
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
 
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Gradivo je del revije

Naslov:Holzforschung
Skrajšan naslov:Holzforschung
Založnik:Technischer Verlag Herbert Cram
ISSN:0018-3830
COBISS.SI-ID:9817605 Povezava se odpre v novem oknu

Sekundarni jezik

Jezik:Angleški jezik
Ključne besede:mehanski model, mehano-sorptivni učinek, multi-Fckian model prenosa vlage, reologija, natezne napetosti pravokotno na vlakna, les

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