R.J. Goodey

Some Practical Features in Modelling Silos with Finite Elements

Studies have shown significant variability exists in pressure predictions in silos using finite element models. Such pressure predictions must be reliable if designers can use them with confidence. This technical note explains why some differences may occur as a result of small changes in reasonable assumptions when modelling contacts in finite element models of silos. The influence of Poisson´s ratio on the lateral pressures expected in silo walls is analyzed in this paper by comparing the values obtained with two commercial finite element packages, ANSYS and ABAQUS. The interaction between the silo wall and the stored solid is a critical point in the development of finite element models. Finite element models developed with commercial software like ANSYS require the adjustment of many parameters involved in contact simulation. The influence on lateral pressures of the contact stiffness factor and the algorithm method in two materials has been carried out with ANSYS.