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Shear coupling effects on stress and strain distributions in wood subjected to transverse compression
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.ORCID iD: 0000-0001-5818-2378
2007 (English)In: Composites Science And Technology, ISSN 0266-3538, E-ISSN 1879-1050, Vol. 67, no 08-jul, 1362-1369 p.Article in journal (Refereed) Published
Abstract [en]

The mechanical behaviour of a wood board subjected to transverse compression is relevant to the performance of glulam beams and solid wood structures. The wood material can be described as polar orthotropic, due to the annual ring structure and to the differences in moduli in different directions in the radial-tangential plane. Strain measurements are performed on single wood boards using a whole-field digital speckle photography technique. Finite element analysis is performed and compared with experimental data. Good agreement in terms of strain fields and apparent moduli is observed between predictions and data. The experimental data show strong variations in local strain due to the polar orthotropic behaviour of wood in this plane, and the extremely low value for shear modulus G(rt) as compared with the other moduli. This leads to shear coupling effects resulting in large local shear deformation and correspondingly low effective stiffness under transverse global loading.

Place, publisher, year, edition, pages
2007. Vol. 67, no 08-jul, 1362-1369 p.
Keyword [en]
wood, transverse stiffness, polar orthotropy, shear coupling, digital speckle photography, grain
Identifiers
URN: urn:nbn:se:kth:diva-16606DOI: 10.1016/j.compscitech.2006.09.013ISI: 000246253200011Scopus ID: 2-s2.0-33847723824OAI: oai:DiVA.org:kth-16606DiVA: diva2:334648
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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Berglund, Lars A.

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