WFRF:(Turesson Jonas 1991 )
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Impact of laminate directions on inplane shear stiffness of crosslaminated timber
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- Turesson, Jonas, 1991- (författare)
- Luleå tekniska universitet,Träteknik
-
- Ekevad, Mats, 1956- (författare)
- Luleå tekniska universitet,Träteknik
- (creator_code:org_t)
- 2016
- 2016
- Engelska.
- Ingår i: Annual Meeting of the Northern European Network for Wood Science and Engineering WSE.
- Konferensbidrag (refereegranskat)
Abstract
Ämnesord
Stäng
- Twenty-three finite element models of cross-laminated timber (CLT) with different laminate directions were studied. Simulations with quadratic orthotropic linear elastic finite elements were conducted. One goal was to compare in-plane shear stiffnesses for CLT blocks made up from Norway Spruce (Picea abies) boards. 3- and 5-layer CLT were studied with board sizes 25x150x1200 mm. Bloc sizes were 75x1200x1200 and 125x1200x1200 mm for 3-layer and 5-layer blocs, respectively. The first and last layers laminate directions were assumed to be in direction 0○. The second and fourth layers laminate directions for 5-layer models were assumed equal and were 5○, 10○, 15○, 30○, 45○, 60○, 75○ and 90○. The middle layer was in direction 0○ or 90○. For 3-layer models the middle layers laminate directions were 5○, 10○, 15○, 30○, 45○, 60○, 75○ and 90○. No edge gluing was assumed and thus all side edges were allowed to separate or overlap. Glued contact surfaces were assumed to be perfectly glued with rigid glue. The results for 5-layer models showed that all models with angled second and fourth layers were stiffer than the models with 90○ layers. Stiffnesses for models with angled second and fourth layers were higher when the middle layer laminate direction was 90○ compared to 0○. The stiffest 5-layer model was the one with laminate directions 0/45/90/45/0. This stiffness was 1.5 times the shear stiffness of a reference block with 1-layer and solid timber shear stiffness. The stiffest 3-layer model was the one with laminate directions 0/30/0. This stiffness was 0.99 times the shear stiffness of the reference bloc.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Annan maskinteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Other Mechanical Engineering (hsv//eng)
Nyckelord
- Cross laminated timber
- CLT
- shear stiffness
- finite element
- FEM
- Träteknik
- Wood Science and Engineering
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- kon (ämneskategori)
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