Comparative studies of three tropical wood species under compressive cyclic loading and moisture content changes
| Autor: | Serge Ekomy Ango, Samuel Ikogou, Claude Feldman Pambou Nziengui, Arnauld Clauvy’s Engonga Edzang, Rostand Moutou Pitti |
|---|---|
| Přispěvatelé: | Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Ecole polytechnique de Masuku (EPM), Université des Sciences et Techniques de Masuku [Franceville, Gabon] (USTM), Université des Sciences et Techniques de Masuku (USTM) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
040101 forestry
0106 biological sciences Materials science biology Milicia excelsa internal humidity impact 04 agricultural and veterinary sciences biology.organism_classification Pterocarpus soyauxii 01 natural sciences Compressive load Horticulture Tropical wood 010608 biotechnology [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph] 0401 agriculture forestry and fisheries Cyclic loading General Materials Science Tropical species Water content Aucoumea klaineana cyclic compressive loading |
| Zdroj: | Wood Material Science and Engineering Wood Material Science and Engineering, Taylor & Francis, In press, ⟨10.1080/17480272.2020.1712739⟩ Wood Material Science and Engineering, In press, ⟨10.1080/17480272.2020.1712739⟩ |
| ISSN: | 1748-0272 1748-0280 |
| DOI: | 10.1080/17480272.2020.1712739⟩ |
| Popis: | International audience; The objective of the present study is to perform an experimental comparative cyclic compressive loading test on three tropical species (Aucoumea Klaineana Pierre, Milicia Excelsa and Pterocarpus Soyauxii), at different internal moisture content stages. 150 samples of these three species, dimensioned according to standard NF EN 408 were tested. The specimens were loaded into the static compressive test until they collapsed in order to obtain the mechanical characteristics of each species in terms of: (i) the modulus of elasticity, (ii) the maximal strength and (iii) the stress at the yield point. The specimens are submitted five times to loading-unloading-reloading in cyclic compressive at different internal moisture contents. The applied force was taken at 10% of the maximum rupture force of Okoume species and kept constant at each cycle. The results show a stiffening of the three types of specimens with the loading cycles. The stiffening is faster from the densest species to the least dense species, respectively. In addition, the phenomenon of densification, that occurs during the five loading-unloading cycles, is done with constancy of compressive strength in the three species studied. |
| Databáze: | OpenAIRE |
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