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European Journal of Wood and Wood Products

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21-01-2017 | Original

Modelling mechanical properties of spruce and Douglas fir timber by means of X-ray and grain angle measurements for strength grading purpose

Authors: Joffrey Viguier, Damien Bourreau, Jean-François Bocquet, Guillaume Pot, Laurent Bléron, Jean-Denis Lanvin

Published in: European Journal of Wood and Wood Products | Issue 4/2017

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Abstract

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 ultrasound methods), static bending stiffness and bending strength of 805 boards of Douglas fir and 437 boards of spruce. This model can be used in an industrial context since it requires low computational time. The results of this study show that the developed model gives better results than the global non-destructive measurements of the elastic modulus commonly used in the industry. It also shows that this improvement is particularly higher in the case of Douglas fir than for spruce. The comparison has been made on both the quality of the mechanical properties assessment and on the improvement of the grading process according to the European standards by using different index.

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Title: Modelling mechanical properties of spruce and Douglas fir timber by means of X-ray and grain angle measurements for strength grading purpose
Authors: Joffrey Viguier
Damien Bourreau
Jean-François Bocquet
Guillaume Pot
Laurent Bléron
Jean-Denis Lanvin
Publication date: 21-01-2017
Publisher: Springer Berlin Heidelberg
Published in: European Journal of Wood and Wood Products / Issue 4/2017
Print ISSN: 0018-3768
Electronic ISSN: 1436-736X
DOI: https://doi.org/10.1007/s00107-016-1149-4

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