Biomechanics of buttressed trees : bending strains and stresses
The different hypotheses about buttress function and formation mainly involve mechanical theory. Forces were applied to two trees of Sloanea spp., a tropical genus that develops typical thin buttresses, and the three-dimensional strains were measured at different parts of the trunk base. Risks of failure were greater on the buttress sides, where shear and tangential stresses are greater, not on the ridges, in spite of high longitudinal (parallel to the grain) stresses. A simple beam model, computed from the second moment of area of digitized cross sections, is consistent with longitudinal strain variations but cannot predict accurately variations with height. Patterns of longitudinal strain variation along ridges are very different in the two individuals, owing to a pronounced lateral curvature in one specimen. The constant stress hypothesis is discussed based on these results. Without chronological data during the development of the tree, it cannot be proved that buttress formation is activated by stress or strain.
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dig-cirad-fr-5386692022-04-22T13:08:20Z http://agritrop.cirad.fr/538669/ http://agritrop.cirad.fr/538669/ Biomechanics of buttressed trees : bending strains and stresses. Clair Bruno, Fournier Meriem, Prévost Marie-Françoise, Beauchêne Jacques, Bardet Sandrine. 2003. American Journal of Botany, 90 (9) : 1349-1356.https://doi.org/10.3732/ajb.90.9.1349 <https://doi.org/10.3732/ajb.90.9.1349> Researchers Biomechanics of buttressed trees : bending strains and stresses Clair, Bruno Fournier, Meriem Prévost, Marie-Françoise Beauchêne, Jacques Bardet, Sandrine eng 2003 American Journal of Botany K50 - Technologie des produits forestiers The different hypotheses about buttress function and formation mainly involve mechanical theory. Forces were applied to two trees of Sloanea spp., a tropical genus that develops typical thin buttresses, and the three-dimensional strains were measured at different parts of the trunk base. Risks of failure were greater on the buttress sides, where shear and tangential stresses are greater, not on the ridges, in spite of high longitudinal (parallel to the grain) stresses. A simple beam model, computed from the second moment of area of digitized cross sections, is consistent with longitudinal strain variations but cannot predict accurately variations with height. Patterns of longitudinal strain variation along ridges are very different in the two individuals, owing to a pronounced lateral curvature in one specimen. The constant stress hypothesis is discussed based on these results. Without chronological data during the development of the tree, it cannot be proved that buttress formation is activated by stress or strain. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/538669/1/document_538669.pdf application/pdf Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.3732/ajb.90.9.1349 10.3732/ajb.90.9.1349 http://catalogue-bibliotheques.cirad.fr/cgi-bin/koha/opac-detail.pl?biblionumber=197047 info:eu-repo/semantics/altIdentifier/doi/10.3732/ajb.90.9.1349 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.3732/ajb.90.9.1349 |
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K50 - Technologie des produits forestiers K50 - Technologie des produits forestiers Clair, Bruno Fournier, Meriem Prévost, Marie-Françoise Beauchêne, Jacques Bardet, Sandrine Biomechanics of buttressed trees : bending strains and stresses |
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The different hypotheses about buttress function and formation mainly involve mechanical theory. Forces were applied to two trees of Sloanea spp., a tropical genus that develops typical thin buttresses, and the three-dimensional strains were measured at different parts of the trunk base. Risks of failure were greater on the buttress sides, where shear and tangential stresses are greater, not on the ridges, in spite of high longitudinal (parallel to the grain) stresses. A simple beam model, computed from the second moment of area of digitized cross sections, is consistent with longitudinal strain variations but cannot predict accurately variations with height. Patterns of longitudinal strain variation along ridges are very different in the two individuals, owing to a pronounced lateral curvature in one specimen. The constant stress hypothesis is discussed based on these results. Without chronological data during the development of the tree, it cannot be proved that buttress formation is activated by stress or strain. |
format |
article |
topic_facet |
K50 - Technologie des produits forestiers |
author |
Clair, Bruno Fournier, Meriem Prévost, Marie-Françoise Beauchêne, Jacques Bardet, Sandrine |
author_facet |
Clair, Bruno Fournier, Meriem Prévost, Marie-Françoise Beauchêne, Jacques Bardet, Sandrine |
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Clair, Bruno |
title |
Biomechanics of buttressed trees : bending strains and stresses |
title_short |
Biomechanics of buttressed trees : bending strains and stresses |
title_full |
Biomechanics of buttressed trees : bending strains and stresses |
title_fullStr |
Biomechanics of buttressed trees : bending strains and stresses |
title_full_unstemmed |
Biomechanics of buttressed trees : bending strains and stresses |
title_sort |
biomechanics of buttressed trees : bending strains and stresses |
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http://agritrop.cirad.fr/538669/ http://agritrop.cirad.fr/538669/1/document_538669.pdf |
work_keys_str_mv |
AT clairbruno biomechanicsofbuttressedtreesbendingstrainsandstresses AT fourniermeriem biomechanicsofbuttressedtreesbendingstrainsandstresses AT prevostmariefrancoise biomechanicsofbuttressedtreesbendingstrainsandstresses AT beauchenejacques biomechanicsofbuttressedtreesbendingstrainsandstresses AT bardetsandrine biomechanicsofbuttressedtreesbendingstrainsandstresses |
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1758021248171900928 |