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Crack influence on load-bearing capacity of glued laminated timber using extended finite element modelling
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Träteknik.ORCID-id: 0000-0002-4686-4010
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Träteknik.ORCID-id: 0000-0002-4526-9391
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Träteknik.ORCID-id: 0000-0002-0145-080X
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Träteknik.
2015 (engelsk)Inngår i: Wood Material Science & Engineering, ISSN 1748-0272, E-ISSN 1748-0280, Vol. 10, nr 4, s. 335-343Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Most of the cracks are caused by changes in temperature and relative humidity which lead to shrinkage and swelling of the wood and thereby induce stresses in the structure. How these cracks influence the strength of the wooden structure, especially the shear strength, is not well understood. However, it is reasonable to expect that cracks have an impact on the shear strength as they preferably run along the beams in the direction of grain and bond lines. The purpose of this study was to investigate the load-bearing capacity of cracked glulam beams and to find a model that could predict the failure load of the beams due to the cracks. Three-point bending tests were used on glulam beams of different sizes with pre-manufactured cracks. An orthotropic elastic model and extended finite element method was used to model the behaviour of the cracked beams and to estimate the load-bearing capacity. The conclusions were validated by numerical simulations of the mechanical behaviour of three-point bending of glulam beams with different crack locations. The crack initiation load was recorded as the failure load and compared to the experimental failure load. The results of the compaction simulations agree well with the experimental results

sted, utgiver, år, opplag, sider
2015. Vol. 10, nr 4, s. 335-343
Emneord [en]
Forestry, agricultural sciences and landscape planning - Wood fibre and forest products
Emneord [sv]
Skogs- och jordbruksvetenskap samt landskapsplanering - Träfiber- och virkeslära
HSV kategori
Forskningsprogram
Träteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-7608DOI: 10.1080/17480272.2015.1027268ISI: 000368718400003Scopus ID: 2-s2.0-84945452586Lokal ID: 5ff81246-b07d-4875-b725-2b03c5e2df47OAI: oai:DiVA.org:ltu-7608DiVA, id: diva2:980498
Merknad

Validerad; 2015; Nivå 1; 20150417 (andbra)

Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-07-10bibliografisk kontrollert

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Berg, SvenSandberg, DickEkevad, MatsVaziri, Mojgan

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