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Comparison of measu...
Comparison of measured creep in a wooden beam with finite element predictions based on orthotropic viscoelastic material model
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- Bengtsson, Rhodel (författare)
- Uppsala universitet,Tillämpad mekanik,Uppsala University
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- Florisson, Sara (författare)
- Uppsala universitet,Tillämpad mekanik
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- Afshar, Reza (författare)
- Uppsala universitet,Tillämpad mekanik
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visa fler...
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Mousavi, Mahmoud (författare)
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- Van Blokland, Joran (författare)
- Department of Forest Biomaterials and Technology, SLU
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- Gamstedt, Kristofer (författare)
- Uppsala universitet,Tillämpad mekanik
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visa färre...
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(creator_code:org_t)
- Engelska.
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- Creep is of concern for long-term deformations of wooden structures. Since wood is anisotropic and creeps in several material directions, it may not be sufficient to include only axial creep along the grain even for deformations in beam-like components. A bottle-neck is that creep characterisation in all material directions is both costly and complicated. Multiscale modelling from cell-wall creep including the main contributing features (density, ray content, microfibrillar angle) can contribute to fill to complete material models for wood creep. In the present study, we have chosen a four-point bending test of a Norway spruce beam to represent a loaded wooden component in a structure. Digital image correlation was used to gather data on strain and displacement fields during the creep test. The experimental results were compared with finite element predictions based on a 3D orthotropic viscoelastic model obtained by multiscale homogenisation. There was generally good agreement in the strain fields between the finite element simulations and experimental observations. However, the numerical predictions exhibits slightly greater stiffness in terms of displacement, suggesting the need for further refinement of the multiscale model or a combination of materials creep charactrisation and multiscale modelling.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Kompositmaterial och -teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Composite Science and Engineering (hsv//eng)
Nyckelord
- Materialvetenskap
- Materials Science
Publikations- och innehållstyp
- vet (ämneskategori)
- ovr (ämneskategori)