Tag Archives: normal stress

Stresses in Silos Part 2: Stresses in Hoppers – Disturbances to the Stress Distribution

By D. Schulze The first part of the paper on stresses in silos [10] focused on the bulk solid properties with respect to stresses, and the stresses in the vertical part of a silo. The present second part explains the stresses acting in hoppers for filling and emptying conditions. In die ideal case stress distributions are symmetric and uniform. However, in a real silo stresses may change locally, and stresses can be non-uniform along the circumference of a silo. Since this can result in consequences on the stability of a silo, the major sources of disturbances to the stress distribution are outlined. If appropriate, it will be referred to the bulk solid properties explained in part 1 [10]. Continue reading Stresses in Silos Part 2: Stresses in Hoppers – Disturbances to the Stress Distribution

Stresses in Silos Part 1: Bulk Solid Properties – Stresses in the Vertical Section

By D. Schulze An important part of bulk solids technology is the understanding of stresses (bulk solid pressures) acting on silo walls which, in turn, is important for the stability of silos. However, the behavior of bulk solids is taught in universities within the frame of mechanical process engineering, or conveying technology, but it is not part of the basic knowledge of all engineers. Therefore, the goal of the present paper is to explain how stresses develop in bulk solids containers such as hoppers or silos. At some instances simplified models are introduced in order to make the understanding of the topic easier for those who are new to bulk solids technology. More details of the matter are presented in [1, 2]. In the first part the behavior of bulk solids which are responsible for the stress conditions in silos and hoppers are outlined, and the stresses developing in a silo’s vertical section are examined. Continue reading Stresses in Silos Part 1: Bulk Solid Properties – Stresses in the Vertical Section