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Inventaire et hiérarchisation de paramètres structuraux facteurs de variabilité intraspécifique de certaines propriétés mécano physiques des tissus ligneux

Abstract : Structural predicting modelling of elastic anisotropic behaviour of gross wood are based on micro macro approach using successive scale changes (cell wall-wood cell, wood cell-tissue, tissue-annual ring). At each of these integrated levels of description is associated a more or less complex set of parameters allowing a local description of the mechanical behaviour. Such modelling presents a double interest: coherence of stacking models permits to clarify the role of each constitutive element allowing to evaluate some properties via experimental values at the upper scale. Simulation of elastic anisotropy of softwood is achieved here by four succesives descriptives scales called « Passages » (Passage 1 from polymers to sub-layer, Passage 2 from sub-layer to double cell wall, Passage 3 from double cell wall to tissue and finally Passage 4 from tissue to annual ring). In this integrated modelling of elastic anisotropy of wood, predicting successive descriptive steps one list, called RSV, of 22 strictly useful parameters is established to describe anisotropic elastic properties of normal softwood. A hierarchising and analysis are achevied and confirm role of microfibrillar angle (MFA) in gross wood elastic anisotropy. Experimentation on compression wood of three softwood allow to compare RSV modelling to results obtained from several methods.
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Contributor : Christophe Gachet <>
Submitted on : Tuesday, October 19, 2004 - 10:53:13 PM
Last modification on : Thursday, January 11, 2018 - 6:20:34 AM
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Christophe Gachet. Inventaire et hiérarchisation de paramètres structuraux facteurs de variabilité intraspécifique de certaines propriétés mécano physiques des tissus ligneux. Mécanique [physics.med-ph]. Université Sciences et Technologies - Bordeaux I, 2003. Français. ⟨tel-00007161⟩

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