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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The influence of veneer thickness and knot proportion on the mechanical properties of laminated veneer lumber (LVL) made from secondary quality hardwood PURBA, Citra Yanto Ciki; POT, Guillaume; VIGUIER, Joffrey; RUELLE, Julien; DENAUD, Louis (Springer Nature, 2019)The first objective of this work was to study the influence of veneer quality on the mechanical properties of laminated veneer lumber (LVL) made of secondary quality hardwood. The second objective was to propose an adapted ...
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 ...
Performance of strength grading methods based on fibre orientation and axial resonance frequency applied to Norway spruce (Picea abies L.), Douglas fir (Pseudotsuga menziesii (Mirb.) Franco) and European oak (Quercus petraea (Matt.) Liebl./Quercus robur L.) OLSSON, Anders; POT, Guillaume; VIGUIER, Joffrey; FAYDI, Younes; OSCARSSON, Jan (Springer Nature, 2018)Key message Machine strength grading of sawn timber is an important value adding process for the sawmilling industry. By utilizing data of local fibre orientation on timber surfaces, obtained from laser scanning, more ...
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 ...
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 ...