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<title lang=en>Radial Variations of Vibrational Properties of Three Tropical Woods</title>
<creator>Zhang, Tian</creator>
<creator>Bai, Shu-Lin</creator>
<creator>Bardet, Sandrine</creator>
<creator>Alméras, Tancrède</creator>
<creator>Thibaut, Bernard</creator>
<creator>Beauchêne, Jacques</creator>
<contributor>Department of Advanced Materials and Nanotechnology ; Peking University [Beijing]</contributor>
<contributor>Laboratoire de Mécanique et Génie Civil (LMGC) ; Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Mécanique de l'Arbre et du Bois (MAB) ; Laboratoire de Mécanique et Génie Civil (LMGC) ; Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Ecologie des forêts de Guyane (ECOFOG) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD) - Institut National de la Recherche Agronomique (INRA) - Université des Antilles et de la Guyane (UAG) - AgroParisTech - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description>International audience</description>
<source>ISSN: 1435-0211</source>
<source>EISSN: 1611-4663</source>
<source>Journal of Wood Science</source>
<publisher>Springer Verlag</publisher>
<identifier>hal-00797055</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00797055</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00797055/document</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00797055/file/Radial_variations_vibrational_Zhang_al.pdf</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00797055</source>
<source>Journal of Wood Science, Springer Verlag, 2011, 57, pp.377-386</source>
<language>en</language>
<subject lang=en>tropical woods</subject>
<subject lang=en>vibrational properties</subject>
<subject lang=en>dynamic modulus</subject>
<subject lang=en>damping coefficient</subject>
<subject lang=en>microfibril angle</subject>
<subject lang=en>extractives</subject>
<subject lang=en>wood ageing</subject>
<subject>[SPI.MECA.MEMA] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph]</subject>
<subject>[PHYS.MECA.MEMA] Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph]</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Radial trends of vibrational properties, including the specific dynamic modulus (E'/r) and damping coefficient (tand), were investigated for 3 tropical rainforest hardwood species, Simarouba amara, Carapa procera and Symphonia globulifera by free-free flexural vibration test. The microfibril angle (MFA) was estimated through X-Ray diffraction. Consistent patterns of radial variations were observed for all studied properties. E'/r was found to decrease from pith to bark, which is strongly related to the increasing pith-bark trend of MFA. The variation of tand along the radius can be partly explained by MFA, and partly by the gradient of extractives due to heartwood formation. The coupling effect of MFA and extractives could be separated through the analysis of log(tand) - log(E'/r) diagram. For the studied species, the extractive content putatively associated to heartwood formation generally tends to decrease the wood damping coefficient. However, this weakening effect of extractives was not observed for inner part of the heartwood, suggesting the mechanical action of extractives was reduced during their chemical ageing.</description>
<date>2011</date>
</dc>
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