抄録
This paper concerns the evaluation method for normal contact force in the Distinct Element Method (DEM) in terms of the energy conservation. The contact force in DEM is usually obtained from the relative displacement and velocity of the particles, using analogy of springdashpot system. In the usual evaluation, the kinetic energy of the system is not taken account for the contact force because the model of the contact force is a mere imitation of the springdashpot system. In this paper, an evaluation method for normal contact force, that conserves the kinetic energy is newly proposed. A basic validation is carried out to confirm the validity of the proposed model. It is shown that the proposed model evaluates the normal contact force properly compared to the existing models.
