Comparison of soft-sphere models to measurements of collision properties during normal impacts

By A. B. Stevens, Christine M. Hrenya. 2005

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DEM simulation of impact force exerted by granular flow on rigid structures (2011, result): “The influence of various DEM parameters to the system behavior was investigated in former studies [2, 4, 25, 26, 28, 31, 32].”
Energy absorption during compression and impact of dry elastic-plastic spherical granules (2010, unknown): “If the contact force exceeds the yield point, the coefficient of restitution can decrease with increasing impact velocity, which was shown in many experimental studies [21,23,46,64,86] and described with the models [73,94].”
Collision modelling for the interface-resolved simulation of spherical particles in viscous fluids (2012, methodology): “The same occurs with lowering the stiffness of the SSM in an ad hoc manner, without this being quantified in most cases.”