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The issue of the dissipative normal nonlinear Hertz type contact, extensively explored in the discrete element simulations, is addressed. As several viscoelastic normal contact force models equally coexist, selected viscous damping models for spherical contacts (Lee and Hermann, 1999; Tsuji et al., 1992; Kuwabara and Kono, 1987; Hu et al., 2011) are investigated, and a comparative evaluation of these...
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