Modelling of bending creep of low- and high-temperature-dried spruce timber
(2013) In Wood Science and Technology- Abstract
- In the current project, a finite element model is developed to analyse the long-term behaviour of timber beams. The time-dependent response of wood subjected to bending and moisture changes is investigated in terms of strains and stresses. A rheological model is implemented to capture the effects of creep, mechano-sorption and hygroexpansion. The model is validated against test results from Bengtsson and Kliger (Holzforschung 57:95–100, 2003). The results of the analysis showed that the mechano-sorptive creep of low- (LT) and high-temperature-dried (HT) timber beams can be sufficiently modelled with a spring and a single Kelvin body. The different mechano-sorptive behaviour of LT- and HT-dried specimens is considered with different... (More)
- In the current project, a finite element model is developed to analyse the long-term behaviour of timber beams. The time-dependent response of wood subjected to bending and moisture changes is investigated in terms of strains and stresses. A rheological model is implemented to capture the effects of creep, mechano-sorption and hygroexpansion. The model is validated against test results from Bengtsson and Kliger (Holzforschung 57:95–100, 2003). The results of the analysis showed that the mechano-sorptive creep of low- (LT) and high-temperature-dried (HT) timber beams can be sufficiently modelled with a spring and a single Kelvin body. The different mechano-sorptive behaviour of LT- and HT-dried specimens is considered with different mechano-sorptive and shrinkage–swelling parameters. The presented model could be used to derive general mechano-sorptive parameters: (1) for better prediction of creep over the service life and (2) to provide a basis of time-dependent probabilistic calculations for structural-sized timber in serviceability limit state. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4091672
- author
- Honfi, Daniel LU ; Mårtensson, Annika LU ; Thelandersson, Sven LU and Kliger, Robert
- organization
- publishing date
- 2013
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Timber, Creep, Mechano-sorption, Drying
- in
- Wood Science and Technology
- publisher
- Springer
- external identifiers
-
- wos:000330626100004
- scopus:84893106303
- ISSN
- 1432-5225
- DOI
- 10.1007/s00226-013-0581-4
- language
- English
- LU publication?
- yes
- id
- f6c67bfd-436e-4962-8535-11144c076e76 (old id 4091672)
- date added to LUP
- 2016-04-01 13:05:05
- date last changed
- 2022-04-21 19:39:51
@article{f6c67bfd-436e-4962-8535-11144c076e76, abstract = {{In the current project, a finite element model is developed to analyse the long-term behaviour of timber beams. The time-dependent response of wood subjected to bending and moisture changes is investigated in terms of strains and stresses. A rheological model is implemented to capture the effects of creep, mechano-sorption and hygroexpansion. The model is validated against test results from Bengtsson and Kliger (Holzforschung 57:95–100, 2003). The results of the analysis showed that the mechano-sorptive creep of low- (LT) and high-temperature-dried (HT) timber beams can be sufficiently modelled with a spring and a single Kelvin body. The different mechano-sorptive behaviour of LT- and HT-dried specimens is considered with different mechano-sorptive and shrinkage–swelling parameters. The presented model could be used to derive general mechano-sorptive parameters: (1) for better prediction of creep over the service life and (2) to provide a basis of time-dependent probabilistic calculations for structural-sized timber in serviceability limit state.}}, author = {{Honfi, Daniel and Mårtensson, Annika and Thelandersson, Sven and Kliger, Robert}}, issn = {{1432-5225}}, keywords = {{Timber; Creep; Mechano-sorption; Drying}}, language = {{eng}}, publisher = {{Springer}}, series = {{Wood Science and Technology}}, title = {{Modelling of bending creep of low- and high-temperature-dried spruce timber}}, url = {{http://dx.doi.org/10.1007/s00226-013-0581-4}}, doi = {{10.1007/s00226-013-0581-4}}, year = {{2013}}, }