Effects of fungal decay on elasticity and damping of small-diameter silver fir logs assessed by the vibrational resonant method
A number of studies have shown the ability of the vibration resonant method (VRM) to measure the modulus of elasticity (MOE) and the damping ratio (ξ) of calibrated wooden samples of various dimensions. This method based on free transverse vibrations was also studied to assess the decay extent in small stakes. Nevertheless, a need for investigations was identified in order to apply the method to decayed logs. Both decay and geometrical singularities brought heterogeneity not taken into account by the VRM. The aim of this study was to examine the effects of fungal decay on these two mechanical properties of small-diameter silver fir logs using the VRM. Fifty-five small-diameter logs were monitored over a decay process taking place in a greenhouse located near Grenoble (France). The MOE and ξ were measured in intact and decayed states. The results showed the reliability of the measurements of both properties. ξ was found to be independent of moisture content for wood above the fibre saturation point. The results validated the loss in MOE and the gain in ξ due to fungal activity. Thus, indicators based on the MOE and ξ were proposed and compared to quantify the decay extent. Indicators calculated from the first mode of vibration appeared to be relevant for that purpose. Future work is needed to validate indicators on structural size logs and to compare this quantitative assessment to those obtained by the standard EN 152 that currently serves as a benchmark.
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dig-cirad-fr-5863512024-01-29T00:41:52Z http://agritrop.cirad.fr/586351/ http://agritrop.cirad.fr/586351/ Effects of fungal decay on elasticity and damping of small-diameter silver fir logs assessed by the vibrational resonant method. Barré Jean-Baptiste, Bourrier Franck, Brancheriau Loïc, Bertrand David, Rey Freddy. 2018. Wood Science and Technology, 52 (2) : 403-420.https://doi.org/10.1007/s00226-017-0961-2 <https://doi.org/10.1007/s00226-017-0961-2> Effects of fungal decay on elasticity and damping of small-diameter silver fir logs assessed by the vibrational resonant method Barré, Jean-Baptiste Bourrier, Franck Brancheriau, Loïc Bertrand, David Rey, Freddy eng 2018 Wood Science and Technology K50 - Technologie des produits forestiers J12 - Manutention, transport, stockage et conservation des produits forestiers Larix Pinus Pseudotsuga menziesii Abies alba propriété mécanique propriété physicochimique bois grume de sciage Élasticité carie du bois champignon pathogène propriété acoustique vibration altitude montagne http://aims.fao.org/aos/agrovoc/c_4195 http://aims.fao.org/aos/agrovoc/c_5890 http://aims.fao.org/aos/agrovoc/c_6312 http://aims.fao.org/aos/agrovoc/c_11 http://aims.fao.org/aos/agrovoc/c_4683 http://aims.fao.org/aos/agrovoc/c_1521 http://aims.fao.org/aos/agrovoc/c_8421 http://aims.fao.org/aos/agrovoc/c_6829 http://aims.fao.org/aos/agrovoc/c_26777 http://aims.fao.org/aos/agrovoc/c_24919 http://aims.fao.org/aos/agrovoc/c_29233 http://aims.fao.org/aos/agrovoc/c_98 http://aims.fao.org/aos/agrovoc/c_8211 http://aims.fao.org/aos/agrovoc/c_316 http://aims.fao.org/aos/agrovoc/c_12676 France Alpes http://aims.fao.org/aos/agrovoc/c_3081 http://aims.fao.org/aos/agrovoc/c_36208 A number of studies have shown the ability of the vibration resonant method (VRM) to measure the modulus of elasticity (MOE) and the damping ratio (ξ) of calibrated wooden samples of various dimensions. This method based on free transverse vibrations was also studied to assess the decay extent in small stakes. Nevertheless, a need for investigations was identified in order to apply the method to decayed logs. Both decay and geometrical singularities brought heterogeneity not taken into account by the VRM. The aim of this study was to examine the effects of fungal decay on these two mechanical properties of small-diameter silver fir logs using the VRM. Fifty-five small-diameter logs were monitored over a decay process taking place in a greenhouse located near Grenoble (France). The MOE and ξ were measured in intact and decayed states. The results showed the reliability of the measurements of both properties. ξ was found to be independent of moisture content for wood above the fibre saturation point. The results validated the loss in MOE and the gain in ξ due to fungal activity. Thus, indicators based on the MOE and ξ were proposed and compared to quantify the decay extent. Indicators calculated from the first mode of vibration appeared to be relevant for that purpose. Future work is needed to validate indicators on structural size logs and to compare this quantitative assessment to those obtained by the standard EN 152 that currently serves as a benchmark. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/586351/7/s00226-017-0961-2.pdf text Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1007/s00226-017-0961-2 10.1007/s00226-017-0961-2 info:eu-repo/semantics/altIdentifier/doi/10.1007/s00226-017-0961-2 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1007/s00226-017-0961-2 |
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K50 - Technologie des produits forestiers J12 - Manutention, transport, stockage et conservation des produits forestiers Larix Pinus Pseudotsuga menziesii Abies alba propriété mécanique propriété physicochimique bois grume de sciage Élasticité carie du bois champignon pathogène propriété acoustique vibration altitude montagne http://aims.fao.org/aos/agrovoc/c_4195 http://aims.fao.org/aos/agrovoc/c_5890 http://aims.fao.org/aos/agrovoc/c_6312 http://aims.fao.org/aos/agrovoc/c_11 http://aims.fao.org/aos/agrovoc/c_4683 http://aims.fao.org/aos/agrovoc/c_1521 http://aims.fao.org/aos/agrovoc/c_8421 http://aims.fao.org/aos/agrovoc/c_6829 http://aims.fao.org/aos/agrovoc/c_26777 http://aims.fao.org/aos/agrovoc/c_24919 http://aims.fao.org/aos/agrovoc/c_29233 http://aims.fao.org/aos/agrovoc/c_98 http://aims.fao.org/aos/agrovoc/c_8211 http://aims.fao.org/aos/agrovoc/c_316 http://aims.fao.org/aos/agrovoc/c_12676 http://aims.fao.org/aos/agrovoc/c_3081 http://aims.fao.org/aos/agrovoc/c_36208 K50 - Technologie des produits forestiers J12 - Manutention, transport, stockage et conservation des produits forestiers Larix Pinus Pseudotsuga menziesii Abies alba propriété mécanique propriété physicochimique bois grume de sciage Élasticité carie du bois champignon pathogène propriété acoustique vibration altitude montagne http://aims.fao.org/aos/agrovoc/c_4195 http://aims.fao.org/aos/agrovoc/c_5890 http://aims.fao.org/aos/agrovoc/c_6312 http://aims.fao.org/aos/agrovoc/c_11 http://aims.fao.org/aos/agrovoc/c_4683 http://aims.fao.org/aos/agrovoc/c_1521 http://aims.fao.org/aos/agrovoc/c_8421 http://aims.fao.org/aos/agrovoc/c_6829 http://aims.fao.org/aos/agrovoc/c_26777 http://aims.fao.org/aos/agrovoc/c_24919 http://aims.fao.org/aos/agrovoc/c_29233 http://aims.fao.org/aos/agrovoc/c_98 http://aims.fao.org/aos/agrovoc/c_8211 http://aims.fao.org/aos/agrovoc/c_316 http://aims.fao.org/aos/agrovoc/c_12676 http://aims.fao.org/aos/agrovoc/c_3081 http://aims.fao.org/aos/agrovoc/c_36208 |
spellingShingle |
K50 - Technologie des produits forestiers J12 - Manutention, transport, stockage et conservation des produits forestiers Larix Pinus Pseudotsuga menziesii Abies alba propriété mécanique propriété physicochimique bois grume de sciage Élasticité carie du bois champignon pathogène propriété acoustique vibration altitude montagne http://aims.fao.org/aos/agrovoc/c_4195 http://aims.fao.org/aos/agrovoc/c_5890 http://aims.fao.org/aos/agrovoc/c_6312 http://aims.fao.org/aos/agrovoc/c_11 http://aims.fao.org/aos/agrovoc/c_4683 http://aims.fao.org/aos/agrovoc/c_1521 http://aims.fao.org/aos/agrovoc/c_8421 http://aims.fao.org/aos/agrovoc/c_6829 http://aims.fao.org/aos/agrovoc/c_26777 http://aims.fao.org/aos/agrovoc/c_24919 http://aims.fao.org/aos/agrovoc/c_29233 http://aims.fao.org/aos/agrovoc/c_98 http://aims.fao.org/aos/agrovoc/c_8211 http://aims.fao.org/aos/agrovoc/c_316 http://aims.fao.org/aos/agrovoc/c_12676 http://aims.fao.org/aos/agrovoc/c_3081 http://aims.fao.org/aos/agrovoc/c_36208 K50 - Technologie des produits forestiers J12 - Manutention, transport, stockage et conservation des produits forestiers Larix Pinus Pseudotsuga menziesii Abies alba propriété mécanique propriété physicochimique bois grume de sciage Élasticité carie du bois champignon pathogène propriété acoustique vibration altitude montagne http://aims.fao.org/aos/agrovoc/c_4195 http://aims.fao.org/aos/agrovoc/c_5890 http://aims.fao.org/aos/agrovoc/c_6312 http://aims.fao.org/aos/agrovoc/c_11 http://aims.fao.org/aos/agrovoc/c_4683 http://aims.fao.org/aos/agrovoc/c_1521 http://aims.fao.org/aos/agrovoc/c_8421 http://aims.fao.org/aos/agrovoc/c_6829 http://aims.fao.org/aos/agrovoc/c_26777 http://aims.fao.org/aos/agrovoc/c_24919 http://aims.fao.org/aos/agrovoc/c_29233 http://aims.fao.org/aos/agrovoc/c_98 http://aims.fao.org/aos/agrovoc/c_8211 http://aims.fao.org/aos/agrovoc/c_316 http://aims.fao.org/aos/agrovoc/c_12676 http://aims.fao.org/aos/agrovoc/c_3081 http://aims.fao.org/aos/agrovoc/c_36208 Barré, Jean-Baptiste Bourrier, Franck Brancheriau, Loïc Bertrand, David Rey, Freddy Effects of fungal decay on elasticity and damping of small-diameter silver fir logs assessed by the vibrational resonant method |
description |
A number of studies have shown the ability of the vibration resonant method (VRM) to measure the modulus of elasticity (MOE) and the damping ratio (ξ) of calibrated wooden samples of various dimensions. This method based on free transverse vibrations was also studied to assess the decay extent in small stakes. Nevertheless, a need for investigations was identified in order to apply the method to decayed logs. Both decay and geometrical singularities brought heterogeneity not taken into account by the VRM. The aim of this study was to examine the effects of fungal decay on these two mechanical properties of small-diameter silver fir logs using the VRM. Fifty-five small-diameter logs were monitored over a decay process taking place in a greenhouse located near Grenoble (France). The MOE and ξ were measured in intact and decayed states. The results showed the reliability of the measurements of both properties. ξ was found to be independent of moisture content for wood above the fibre saturation point. The results validated the loss in MOE and the gain in ξ due to fungal activity. Thus, indicators based on the MOE and ξ were proposed and compared to quantify the decay extent. Indicators calculated from the first mode of vibration appeared to be relevant for that purpose. Future work is needed to validate indicators on structural size logs and to compare this quantitative assessment to those obtained by the standard EN 152 that currently serves as a benchmark. |
format |
article |
topic_facet |
K50 - Technologie des produits forestiers J12 - Manutention, transport, stockage et conservation des produits forestiers Larix Pinus Pseudotsuga menziesii Abies alba propriété mécanique propriété physicochimique bois grume de sciage Élasticité carie du bois champignon pathogène propriété acoustique vibration altitude montagne http://aims.fao.org/aos/agrovoc/c_4195 http://aims.fao.org/aos/agrovoc/c_5890 http://aims.fao.org/aos/agrovoc/c_6312 http://aims.fao.org/aos/agrovoc/c_11 http://aims.fao.org/aos/agrovoc/c_4683 http://aims.fao.org/aos/agrovoc/c_1521 http://aims.fao.org/aos/agrovoc/c_8421 http://aims.fao.org/aos/agrovoc/c_6829 http://aims.fao.org/aos/agrovoc/c_26777 http://aims.fao.org/aos/agrovoc/c_24919 http://aims.fao.org/aos/agrovoc/c_29233 http://aims.fao.org/aos/agrovoc/c_98 http://aims.fao.org/aos/agrovoc/c_8211 http://aims.fao.org/aos/agrovoc/c_316 http://aims.fao.org/aos/agrovoc/c_12676 http://aims.fao.org/aos/agrovoc/c_3081 http://aims.fao.org/aos/agrovoc/c_36208 |
author |
Barré, Jean-Baptiste Bourrier, Franck Brancheriau, Loïc Bertrand, David Rey, Freddy |
author_facet |
Barré, Jean-Baptiste Bourrier, Franck Brancheriau, Loïc Bertrand, David Rey, Freddy |
author_sort |
Barré, Jean-Baptiste |
title |
Effects of fungal decay on elasticity and damping of small-diameter silver fir logs assessed by the vibrational resonant method |
title_short |
Effects of fungal decay on elasticity and damping of small-diameter silver fir logs assessed by the vibrational resonant method |
title_full |
Effects of fungal decay on elasticity and damping of small-diameter silver fir logs assessed by the vibrational resonant method |
title_fullStr |
Effects of fungal decay on elasticity and damping of small-diameter silver fir logs assessed by the vibrational resonant method |
title_full_unstemmed |
Effects of fungal decay on elasticity and damping of small-diameter silver fir logs assessed by the vibrational resonant method |
title_sort |
effects of fungal decay on elasticity and damping of small-diameter silver fir logs assessed by the vibrational resonant method |
url |
http://agritrop.cirad.fr/586351/ http://agritrop.cirad.fr/586351/7/s00226-017-0961-2.pdf |
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