A study on tangential force laws applicable to the discrete element method (DEM) for materials with viscoelastic or plastic behavior

By H. Kruggel-Emden, Siegmar Wirtz, Viktor Scherer. 2008

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Collision modelling for the interface-resolved simulation of spherical particles in viscous fluids (2012, background): “Since Mindlin (1949) and Mindlin & Deresiewicz (1953) performed the first theoretical analysis of the oblique impact of spheres, numerous proposals for modelling the tangential forces have been presented, e.g. by Vu-Quoc et al. (2004) and Kruggel-Emden et al. (2008).”
Comparative study of different discrete element models and evaluation of equivalent micromechanical parameters (2012, background): “Interparticle interaction models can be based on different types of contact laws incorporating different physical effects such as elasticity, viscosity, damage and friction (Donze et al., 2009; Kruggel-Emden et al., 2008; Luding, 2008; Chang and Hicher, 2005).”
Particle-based simulation of powder application in additive manufacturing (2016, unknown): “The complex geometric shape of powder particles is modeled here by means of the multisphere method, which consists of combining spherical particles of different sizes to approximate the non-spherical shape [13], [35], [28], [14], [12], [32].”