The behavior of sand crushing will appear when the confining pressure is up to a certain value, which results in disappearing of the positive dilatancy of sand. Adopting a new hardening parameter with the crushing stress, an elastoplastic constitutive model considering sand crushing is proposed. Comparing the conventional triaxial compression test results with the model prediction, it shows tha...

Numerous industries involve impact crushing of raw material in their processes. Crushing is performed by interaction between raw material witch size is reduced during this process and equipment or parts that crush. Some of the biggest and most important clients of crushing and milling equipment are industries like cement plants, mines, open pits, coal fired thermal plants, recycling and shreddi...

Two types of crushing were applied to grains of red sorghum: manual crushing using a mortar and pestle of kitchen and mechanical crushing using a hammer mill. The flours obtained at the end of these various crushing were filtered and subdivided in different fractions according to the diameters of the mesh of the sieves (0.16mm; 0.25mm; 0.315mm; 0.4mm, and 0.63mm...). Some physical, chemical and...

This paper numerically investigates the seismic response of the filled joint under high amplitude stress waves using the combined finite-discrete element method (FDEM). A thin layer of independent polygonal particles are used to simulate the joint fillings. Each particle is meshed using the Delaunay triangulation scheme and can be crushed when the load exceeds its strength. The propagation of t...

Crushing and screening processes are often regulated using relay-based on/off controls or, when controlled by PID controllers, the control design is limited to a single crusher and its proximity. The design does not necessarily consider process interactions, load disturbances and, in a wider perspective, does not treat a crushing and screening plant as an entity from feeding to product piles. T...

OBJECTIVES Residents of nursing homes often have difficulty swallowing (dysphagia), which complicates the administration of solid oral dosage formulations. Erroneously crushing medication is common, but few interventions have been tested to improve medication safety. Therefore, we evaluated the effect of warning symbols in combination with education on the frequency of erroneously crushing medi...

Limitation of forces can be a simple measure to safeguard crushing points at doors, machines, and vehicles. In this connection different standards define a threshold force value of 150 N. This widely accepted value refers to static forces only. The dynamic forces that arise from impact on a person are frequently ignored, although they are generally higher than the static forces. The article des...

The effect of cell size on the out of plane compressive crushing response of circular cell polycarbonate honeycomb is presented. Over 100 experiments were conducted on specimens ranging in size from 1 to 169 cells (number of cells=N). Experiments showed that for N<19 there was a significant increase in crushing load. The maximum crushing load was observed where N=7. Finite element (FE) analysis...