Mechanical response of wood perpendicular to grain when subjected to changes of humidity

Svensson, Staffan; Toratti, Tomi

doi:10.1007/s00226-001-0130-4

Cited by 85 publications

(43 citation statements)

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“…While basic information about viscoelasticity is given in Nowacki (1965) and Lockett (1972) for example, bending creep tests can be found in Zhou et al (1999) and Bengtsson and Kliger (2003) or under tensile and compressive load in Toratti and Svensson (2000). Theoretical investigations concerning constitutive laws and models were studied in Kaliske (2000), Svensson and Toratti (2002), Hanhijärvi and Mackenzie-Helnwein (2003) or Fortino et al (2009).…”

Section: Introductionmentioning

confidence: 99%

Moisture-dependent, viscoelastic creep of European beech wood in longitudinal direction

Hering

Niemz

2012

Eur. J. Wood Prod.

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In the present study, the pure viscoelastic behaviour of European beech wood is analysed in the longitudinal direction at three different moisture contents. The moisture-dependent creep compliance is identified using a four-point bending test device. The viscoelastic behaviour is ascertained to be linear with moisture content and quantified by means of a Kelvin-Voigt model approach. Viskoelastisches Kriechverhalten von Rotbuche in longitudinaler Richtung bei verschiedenen HolzfeuchtenZusammenfassung In dieser Arbeit wird das viskoelastische Verhalten von Rotbuchenholz in longitudinaler Richtung bei drei verschiedenen Holzfeuchten untersucht. Mit Hilfe eines Vierpunktbiegeprüfstandes wurde die feuchteabhängige Kriechnachgiebigkeit bestimmt. Ein linearer Zusammenhang zwischen der Holzfeuchte und der Kriechnachgiebigkeit wird nachgewiesen und anhand eines verallgemeinerten Kelvin-Voigt Ansatzes quantifiziert.

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Section: Introductionmentioning

confidence: 99%

Moisture-dependent, viscoelastic creep of European beech wood in longitudinal direction

Hering

Niemz

2012

Eur. J. Wood Prod.

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“…The slicing technique was originally developed by [4] and was employed by [5][6][7][8][9]. In the present study, the specimens were first conditioned at 20 • C/35% RH until moisture equilibrium was reached and were then transferred into constant conditions of 20 • C/85% RH.…”

Section: Eigenstressesmentioning

confidence: 99%

Moisture-induced stresses in spruce cross-laminates

Gereke

Niemz

2010

Engineering Structures

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“…On the other hand, the process of water absorption or desorption can produce a gradient of moisture content in the wood because the changes in moisture content on the surface are faster than the changes in the wood material (Siau 1984;Skaar 1988). A major change in humidity or moisture content leads to significant internal stresses (Svensson and Toratti 2002). This behaviour is one limiting point in wood drying.…”

Section: Introductionmentioning

confidence: 99%

Modelling and simulation of deformation behaviour during drying using a concept of linear difference method

2017

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This study deals with the development of a two-dimensional model to simulate the deformations in wood samples during the wood drying process for the evaluation of the drying quality. The samples cut from sapwood of beech were used to analyse the moisture content distribution of the samples at two different drying conditions. A new concept based on a linear difference method was developed to use the moisture content distribution of the samples for the simulation process to predict deformation due to casehardening. The real deformations of the prongs were compared with the simulated ones for further improvements. The results show that the model can be used to simulate the deformations independently from different drying times and drying conditions. A good comparison between real and simulated changes in deformation was found for the drying process at constant climate conditions. The results provide a useful basis for further investigations on the modelling and simulation of the deformation of the samples due to different drying processes.

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Mechanical response of wood perpendicular to grain when subjected to changes of humidity

Cited by 85 publications

References 0 publications

Moisture-dependent, viscoelastic creep of European beech wood in longitudinal direction

Moisture-dependent, viscoelastic creep of European beech wood in longitudinal direction

Moisture-induced stresses in spruce cross-laminates

Modelling and simulation of deformation behaviour during drying using a concept of linear difference method

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