The simulation for a numerical grain and its assembly using DEM and one-dimensional compression tests for many soils were carried out to understand the compression properties of sands through examination of particle crushing strengths. From the simulation, the tensile breaking modes led to large fragmentation of agglomerate in collective crushing (yield point) as similar to single agglomerate crushing. This common micro-mechanical feature gives a justifiable comparison between the yield stress and the single particle crushing strength, although the yield stress is also related to initial voids ratio, grain size and its distribution. But material having a higher particle crushing strength do not necessarily give a higher yield stress. This is because in a uniform material a small proportion of the particles transmit large forces.
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