Wood water relationships, VI. The influence of ray cells on the shrinkage of wood

Barkas, Wilfred W.

doi:10.1039/tf9413700535

Cited by 16 publications

(11 citation statements)

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“…Early works relate the influence of ray cells, which partially inhibit the free wood shrinkage in the radial direction, as one cause of the transversal anisotropy of wood [28]. As the specimens studied here are mostly composed of juvenile wood, it is not surprising to observe values that are rather low for transverse shrinkage.…”

Section: Resultsmentioning

confidence: 82%

Mild pyrolysis of fast-growing wood species (Caribbean pine and Rose gum): Dimensional changes predicted by the global mass loss

Almeida¹,

Santos²,

Perré³

2014

Biomass and Bioenergy

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Section: Resultsmentioning

confidence: 82%

Mild pyrolysis of fast-growing wood species (Caribbean pine and Rose gum): Dimensional changes predicted by the global mass loss

Almeida¹,

Santos²,

Perré³

2014

Biomass and Bioenergy

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“…Distortion of such a cylinder is termed "inextensional". Bark äs (23) has observed that with increasing thickness of the walls the transverse Poisson's ratio approaches progressively the ratio of the solid material of which the cylinder is formed. This value probably is considerably less than 0.92.…”

Section: Raysmentioning

confidence: 98%

The Relationship of Structure to Transverse Anisotropy in Wood with Reference to Shrinkage and Elasticity

Boutelje¹

1962

Holzforschung

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“…Several scientists tried to use anatomical features as input parameters in statistical explanations. For example, the occurrence of ray cells (Barkas 1941;Boutelje 1962;Kelsey 1963;Keller and Thiercelin 1975;Guitard and El Amri 1987) and the shape of cells (Mariaux and Narboni 1978;Masseran and Mariaux 1985) were tested as possible explanations of shrinkage variability. In 1989, Mariaux observed that the transverse anisotropy of tissues depends on the mean elongation of the cell, but that shrinkage was not isotropic for "isotropic" cells (same mean diameter in both the radial and tangential directions).…”

mentioning

confidence: 99%

New modelling approaches to predict wood properties from its cellular structure: image-based representation and meshless methods

Perré

Almeida

Ayouz

et al. 2016

Annals of Forest Science

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Key message The real tissue structure, including local anisotropy directions, is defined from anatomical images of wood. Using this digital representation, thermal/mass diffusivity and mechanical properties (stiffness, large deformation, rupture) are successfully predicted for any anatomical pattern using suitable meshless methods. Introduction Wood, an engineering material of biological origin, presents a huge variability among and within species. Understanding structure/property relationships in wood would allow engineers to control and benefit from this variability. Several decades of studies in this domain have emphasised the need to account simultaneously for the phase properties and the phase morphology in order to be able to predict wood properties from its anatomical features. This work is focused on the possibilities offered by meshless computational methods to perform upscaling in wood using actual tissue morphologies obtained by microscopic images. Methods After a section devoted to the representation step, the digital representation of wood anatomy by image processing and grid generation, the papers focuses on three meshless methods applied to predict different macroscopic properties in the transverse plane of wood (spruce earlywood, spruce latewood and poplar): Lattice Boltzmann Method (LBM) allows thermal conductivity and mass diffusivity to be predicted, Material Point Method (MPM) deals with rigidity and compression at large deformations and peridynamic method is used to predict the fracture pathway in the cellular arrangement. Results This work proves that the macroscopic properties can be predicted with quite good accuracy using only the cellular structure and published data regarding the cell wall properties. A whole set of results is presented and commented, including the anisotropic ratios between radial and tangential directions.

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Wood water relationships, VI. The influence of ray cells on the shrinkage of wood

Cited by 16 publications

References 0 publications

Mild pyrolysis of fast-growing wood species (Caribbean pine and Rose gum): Dimensional changes predicted by the global mass loss

Mild pyrolysis of fast-growing wood species (Caribbean pine and Rose gum): Dimensional changes predicted by the global mass loss

The Relationship of Structure to Transverse Anisotropy in Wood with Reference to Shrinkage and Elasticity

New modelling approaches to predict wood properties from its cellular structure: image-based representation and meshless methods

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