Figure 8. Contribution of friction and tensile strength on unconfined
yield strength.
4.2 Comparison of experimental and DEM
results
At the 2000 Pa pre-shear load, the DEM predictions for the shear stress
at steady state are compared to the experimentally measured
τpre. This comparison is shown in Figure 9; higher
τpre values represent poorer flowing systems. The
predicted stresses associated with the binary blends are larger than
those of the monodispersed particles, exhibiting the same trend as the
experimental results. However, the DEM predictions for
τpre are lower than the experimental values, possibly
due to neglecting the size distribution associated with the large and
small glass beads.