Analysis of friction among grain particles in warehousebased on finite element method

Abstract

In order to investigate the stress distribution between grain particles and the distribution of relative static friction between grain particles and silo walls, the ideal elastic-plastic constitutive relationship and Drucker-prager yield criterion were used to simulate grain storage considering the effect of grain compressibility on the shear dilatancy parameters. The finite element model of the positive pressure and relative static friction between the barn wall and the grain was established. The relative static friction and positive pressure between the barn wall and the grain at different grain loading heights were simulated respectively, and the distribution law of the relative static friction coefficient of the barn wall at different grain loading depths was found. The results show that the relative static friction coefficients are different at different grain filling heights. The specific performance is that with the increase of depth, the coefficient increases first and then decreases. It can be seen that the interaction force between grain particles and the static friction force between grain particles and silo wall have very important guiding significance for the measurement of grain weight.

Keywords

• finite element
• particle
• internal stress
• static friction