Although Van Liedekerke (2007) proposes a non-linear Hertz-Kono-Kuwabara contact model, in this study a linear contact model was used with viscous damping assumed at the contacts
Although Van Liedekerke (2007)proposes a non-linear Hertz-Kono-Kuwabara contact model,in this study a linear contact model was used with viscousdamping assumed at the contacts