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Article Dans Une Revue Wood Material Science and Engineering Année : 2020

Comparative studies of three tropical wood species under compressive cyclic loading and moisture content changes

Études comparatives de trois essences de bois tropicaux soumises à une charge compression cyclique et à des changements de teneur en humidité

Serge Ekomy Ango
  • Fonction : Auteur
Rostand Moutou Pitti

Résumé

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.
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Dates et versions

hal-03034992 , version 1 (01-12-2020)

Identifiants

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Arnauld Clauvy’s Engonga Edzang, Claude Feldman Pambou Nziengui, Serge Ekomy Ango, Samuel Ikogou, Rostand Moutou Pitti. Comparative studies of three tropical wood species under compressive cyclic loading and moisture content changes. Wood Material Science and Engineering, In press, ⟨10.1080/17480272.2020.1712739⟩. ⟨hal-03034992⟩
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