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Micromechanics of creep and relaxation of wood. A review COST Action E35 2004–2008: Wood machining – micromechanics and fracture

  • Parviz Navi and Stefanie Stanzl-Tschegg
Published/Copyright: December 4, 2008
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Holzforschung
From the journal Volume 63 Issue 2

Abstract

Wood, like all polymeric materials, shows viscoelastic behaviour. The time dependent behaviour of wood depends on material anisotropy, temperature, moisture and stresses. To predict the behaviour of wood, numerous mathematical models have been developed largely relying on experimental results. In this paper, time dependent viscoelastic behaviour of wood is reviewed under constant and cyclic climatic conditions, separately. More emphasis is given on results obtained in recent years on the behaviour of thin wood tissues, single fibres, thermo-viscoelasticity of wood, influence of hemicelluloses and the modelling of the effect of transient moisture at the molecular level on the mechanical response.

Keywords: creep; hydrogen bonding; mechano-sorptive effect; micromechanics; modelling; relaxation; single wood fibre; viscoelasticity; wood tissue
Corresponding author. Bern University of Applied Sciences, Solothurnstrasse 102, P.O. Box, 2500 Biel, Switzerland Phone: +41-32-3440264 Fax: +41-32-3440391
Received: 2008-5-13
Accepted: 2008-9-9
Published Online: 2008-12-04
Published Online: 2008-12-04
Published in Print: 2009-03-01

©2009 by Walter de Gruyter Berlin New York

Articles in the same Issue

  1. Editorial
  2. Editorial
  3. Selected articles from the COST Action E35 2004–2008: Wood machining – micromechanics and fracture
  4. Cell wall features with regard to mechanical performance. A review COST Action E35 2004–2008: Wood machining – micromechanics and fracture
  5. Hierarchical modelling of microstructural effects on mechanical properties of wood. A review COST Action E35 2004–2008: Wood machining – micromechanics and fracture
  6. Fracture behaviour of wood and its composites. A review COST Action E35 2004–2008: Wood machining – micromechanics and fracture
  7. Modeling crack propagation in wood and wood composites. A review COST Action E35 2004–2008: Wood machining – micromechanics and fracture
  8. Cutting forces in wood machining – Basics and applications in industrial processes. A review COST Action E35 2004–2008: Wood machining – micromechanics and fracture
  9. Fracture toughness, chip types and the mechanics of cutting wood. A review COST Action E35 2004–2008: Wood machining – micromechanics and fracture
  10. Recent progress in research on the cutting processes of wood. A review COST Action E35 2004–2008: Wood machining – micromechanics and fracture
  11. Micromechanics of creep and relaxation of wood. A review COST Action E35 2004–2008: Wood machining – micromechanics and fracture
  12. Properties of wood surfaces – characterisation and measurement. A review COST Action E35 2004–2008: Wood machining – micromechanics and fracture
  13. Original Papers
  14. On the energy consumption for crack development in fibre wall in disc refining – A micromechanical approach
  15. Shear properties of wood measured by the asymmetric four-point bending test of notched specimen
  16. Measurement of the shear properties of clear wood by the Arcan test
  17. Impact of dissolved sodium salts on kraft cooking reactions
  18. Addition of bisulphite to lignin α-carbonyl groups: A study on model compounds and lignin-rich pulp
  19. Visualization of interfacial zones in lyocell fiber-reinforced polypropylene composite by AFM contrast imaging based on phase and thermal conductivity measurements
  20. Ultrastructural development of the softwood cell wall during pyrolysis
  21. Short Note
  22. Effect of copper xyligen treatment on bending properties of wood
  23. Personalia
  24. Umdasch Research Award
  25. Meeting
  26. 10.1515/HF.2009.042
https://doi.org/10.1515/HF.2009.013
Keywords for this article
creep; hydrogen bonding; mechano-sorptive effect; micromechanics; modelling; relaxation; single wood fibre; viscoelasticity; wood tissue

Articles in the same Issue

  1. Editorial
  2. Editorial
  3. Selected articles from the COST Action E35 2004–2008: Wood machining – micromechanics and fracture
  4. Cell wall features with regard to mechanical performance. A review COST Action E35 2004–2008: Wood machining – micromechanics and fracture
  5. Hierarchical modelling of microstructural effects on mechanical properties of wood. A review COST Action E35 2004–2008: Wood machining – micromechanics and fracture
  6. Fracture behaviour of wood and its composites. A review COST Action E35 2004–2008: Wood machining – micromechanics and fracture
  7. Modeling crack propagation in wood and wood composites. A review COST Action E35 2004–2008: Wood machining – micromechanics and fracture
  8. Cutting forces in wood machining – Basics and applications in industrial processes. A review COST Action E35 2004–2008: Wood machining – micromechanics and fracture
  9. Fracture toughness, chip types and the mechanics of cutting wood. A review COST Action E35 2004–2008: Wood machining – micromechanics and fracture
  10. Recent progress in research on the cutting processes of wood. A review COST Action E35 2004–2008: Wood machining – micromechanics and fracture
  11. Micromechanics of creep and relaxation of wood. A review COST Action E35 2004–2008: Wood machining – micromechanics and fracture
  12. Properties of wood surfaces – characterisation and measurement. A review COST Action E35 2004–2008: Wood machining – micromechanics and fracture
  13. Original Papers
  14. On the energy consumption for crack development in fibre wall in disc refining – A micromechanical approach
  15. Shear properties of wood measured by the asymmetric four-point bending test of notched specimen
  16. Measurement of the shear properties of clear wood by the Arcan test
  17. Impact of dissolved sodium salts on kraft cooking reactions
  18. Addition of bisulphite to lignin α-carbonyl groups: A study on model compounds and lignin-rich pulp
  19. Visualization of interfacial zones in lyocell fiber-reinforced polypropylene composite by AFM contrast imaging based on phase and thermal conductivity measurements
  20. Ultrastructural development of the softwood cell wall during pyrolysis
  21. Short Note
  22. Effect of copper xyligen treatment on bending properties of wood
  23. Personalia
  24. Umdasch Research Award
  25. Meeting
  26. 10.1515/HF.2009.042
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