An innovative method based on grain angle measurement to sort veneer and predict mechanical properties of beech laminated veneer lumber
TypeArticles dans des revues avec comité de lecture
This study proposes an innovative model based on local grain angle measurements to predict the modulus of elasticity of LVL made from beech. It includes a veneers sorting method industrially compatible thanks to its low computational time. For this study 41 LVL panels were prepared from 123 beech sheets of veneers. Local grain angle was obtained with a two dimensional scanner and veneer density was measured. Several models based on these measurements have been developed and their ability to predict the modulus of elasticity of LVL panels have been compared. The model based only on local grain angle measurements have been proven more efficient than models taking into account the veneer density. The proposed method can be used to sort veneer during the peeling process and grade the production of LVL panels to optimize their mechanical properties even for low-quality veneer.
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Modelling mechanical properties of spruce and Douglas fir timber by means of X-ray and grain angle measurements for strength grading purpose VIGUIER, Joffrey; BOURREAU, Damien; BOCQUET, Jean-François; POT, Guillaume; BLÉRON, Laurent; LANVIN, Jean-Denis (Springer, 2017)This study proposes a model using data from a scanner (X-ray and grain angle measurements) to perform strength grading. The research also includes global measurements of modulus of elasticity (obtained by vibrations and ...
Lathe check development and properties: effect of log soaking temperature, compression rate, cutting radius and cutting speed during peeling process of European beech (Fagus sylvatica L.) veneer ROHUMAA, Anti; VIGUIER, Joffrey; GIRARDON, Stéphane; KREBS, Michael; DENAUD, Louis (Springer, 2018)The depth of lathe checks and integrity of veneer have been shown to be critical factors affecting the bonding process but also affecting the mechanical properties of veneer-based products. This study shows how beech (Fagus ...
Effect of Forestry Management and Veneer Defects Identified by X-ray Analysis on Mechanical Properties of Laminated Veneer Lumber Beams Made of Beech VIGUIER, Joffrey; MARCON, Bertrand; GIRARDON, Stéphane; DENAUD, Louis (NC State University, 2017)This study proposes an innovative model based on local grain angle measurements to predict the modulus of elasticity of LVL made from beech. It includes a veneers sorting method industrially compatible thanks to its low ...
Numerical study of the influence of veneer lathe checks on the elastic mechanical properties of laminated veneer lumber (LVL) made of beech POT, Guillaume; DENAUD, Louis; COLLET, Robert (De Gruyter, 2014)Laminated veneer lumber (LVL) is a well-known high-performance engineered wood product suitable for structural applications. However, the peeling process can induce lathe checks of the veneer with various depth and spatial ...
Modelling the effects of wood cambial age on the effective modulus of elasticity of poplar laminated veneer lumber GIRARDON, Stéphane; DENAUD, Louis; POT, Guillaume; RAHAYU, Istie (Springer, 2016)Key messageA modelling method is proposed to highlight the effect of cambial age on the effective modulus of elasticity of laminated veneer lumber (LVL) according to bending direction and veneer thickness. This approach ...