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Communication Dans Un Congrès Année : 2023

Effects of the cross-linking of the cellulosic fibrillar network on the macroscopic elastic behaviour of wood

Résumé

This study aims at analyzing the influence of the fibrils oscillations and interconnexions on the macroscopic behavior of wood. For that, a multi-scale model of softwood has been developed, with two options for the cell-wall level: a reference with no oscillations (0S) and oscillations and interconnexions in two directions (2S). The cellwall and tissue steps are made using numerical homogeneisation for periodic media, while the succession of earlywood and latewood is dealt with analytically. It is observed that the influence of the fibrils oscillations is significant for some macroscopic moduli such as the effective shear moduli G " !" and G " !# while for other moduli it looses its significance at the macroscopic level, especially for low-density wood. Although the effect of the interconnexions is strong for some components of the elastic behaviour, it looses its significance at the macroscopic level, especially for low-density wood. This can be explained by the interaction of layers from two neighbouring cells that compensate the absence of interaction between fibrils in the 0S model. The effect becomes stronger in the case of a softened matrix.
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Dates et versions

hal-04366364 , version 1 (28-12-2023)
hal-04366364 , version 2 (29-12-2023)

Identifiants

Citer

Nhat-Tung Phan, François Auslender, Joseph Gril, Rostand Moutou Pitti. Effects of the cross-linking of the cellulosic fibrillar network on the macroscopic elastic behaviour of wood. WCTE, Université de Oslo, Jun 2023, Oslo (Norway), Norway. pp.443-448, ⟨10.52202/069179-0060⟩. ⟨hal-04366364v2⟩
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