Abstract
Contact models employed in the available peridynamic studies are generally based on the short-range repulsive force model. In this paper, we implement a Hertz model in the peridynamic model and analyze energy dissipation from normal elastic impact at low and high impact speeds. We also introduce a new model for elastoplastic contact in peridynamics and compare its results in terms of hysteresis in the load-displacement curves with corresponding Finite Element Method results. The results show that while the short-range repulsive force model in peridynamics gives results that are close to those from an elastic (Hertz) contact peridynamic model, in elastoplastic impact problems, however, it underestimates the plastic energy dissipation. The proposed elastoplastic contact model in peridynamics is more suitable for modeling impact problems in which plastic dissipation is significant.
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