Modélisation thermomécanique de la paroi des greniers de stockage de céréales en banco

Abstract : The storage of cereals is done in rural areas in northern Benin in earth silo that have a limited capacity. The numerous attempts to introduce modern shops have been rejected by the population. This work aims to study the possibility of increasing the storage volume of Yom type silo without changing its architectural form, nor the clay-straw-nere composite. The experimental characterization of the mechanical behaviour of the banco, the construction material of these silo made it possible to define the best dosage for maximum characteristics. By varying the proportion of straw and decoction of nere, the influence on the raw earth of the straw and the decoction is highlighted. The simulation of grain action (filling and discharging) on the silo wall and the analysis of the induced deformations shows that there is a possibility of building larger earth silo. A parametric optimization of the dimensions was made. The effect of successive heating on the silo wall has been considered by modelling heat transfer. The modelling of the temperature profiles in various silo-oriented sections shows that the flow is well damped and the ambient conditions in the attic guarantee good conservation. It is therefore possible to build earth silo with large storage capacity that could be used as community silo or cereal banks for village cooperatives. This solution would solve the problem of food insecurity in rural areas
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Clément Labintan. Modélisation thermomécanique de la paroi des greniers de stockage de céréales en banco. Science des matériaux [cond-mat.mtrl-sci]. Université de Lorraine; Université d'Abomey-Calavi (Bénin), 2018. Français. ⟨NNT : 2018LORR0060⟩. ⟨tel-01920643⟩

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