4.7 Article

Values for the Mechanical Properties of Wheat, Maize and Wood Pellets for Use in Silo Load Calculations Involving Numerical Methods

Journal

AGRONOMY-BASEL
Volume 12, Issue 6, Pages -

Publisher

MDPI
DOI: 10.3390/agronomy12061261

Keywords

agricultural silos; numerical methods; mechanical properties; Poisson's ratio; Young's modulus; wood pellets; wheat; maize

Funding

  1. Spanish Agencia Estatal de Investigacion [PID2019-107051GB-I00/AEI/10.13039/501100011033]

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This study investigates the mechanical properties of wheat, maize, and wood pellets stored in agricultural silos. The results show similar characteristics for wheat and maize compared to previous studies, while the mechanical properties of wood pellets are relatively new and scarce in the literature. The suggested reference values for the tested materials' properties can aid in silo load calculations using numerical methods.
The mechanical properties of the materials stored in agricultural silos determine the loads they generate under static and dynamic conditions. The present work describes the mechanical properties of wheat, maize and wood pellets. Direct shear and triaxial assay devices, and oedometers (all commonly used in geotechnical assays), were used to determine these materials' internal angle of friction, Poisson's ratio, Young's modulus, apparent specific weight, etc. The results for wheat and maize were similar to those previously reported by other authors. For the wood pellets, the results for the internal angle of friction and apparent specific weight were also similar to those found in the literature. However, this is a relatively new type of material, and few results of this type have been reported, certainly not enough for reference values to be available. This work is the first to report this material's dilatancy angle and Poisson's ratio. A table is provided with suggested reference values for the studied mechanical properties of each of the test materials; these can be used in silo load calculations involving numerical methods.

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