MECHANICAL PROPERTIES OF GRANULAR AGRICULTURAL MATERIALS CONSIDERED IN SILOS DESIGN

Abstract eng:
Traditional methods for silos design just took into account some material properties such as the angle of internal friction, the grain to wall friction coefficient and the specific weight. Currently some of these methods are still commonly applied in different international silo design standards. However, with these methods it was not possible to accurately predict dynamic loads in silos. Since numerical methods began to be applied to the design of silos it was possible to better understand the interaction between the grain and the silo walls. With this technique it was necessary to consider additional parameters such as the dilatancy angle, the Poisson’s ratio and the modulus of elasticity that describe the behavior of materials usually stored in silos. Because of the lack of existing data within the literature, the goal of this research was to provide values of different material properties considered in either traditional or more recent silo design methods. These values will be used in finite element models recently developed by the authors to study the discharge of silos.

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