A Review of Calibration Strategies for Microscopic Parameters in Discrete Element Method

Abstract

Discrete element method (DEM) offers a distinct advantage in addressing fracture problems due to its exemption from partial differential equations. However, the governing equations of DEM incorporate microscopic parameters that cannot be accessed via experimental methods. Parameter calibration represents the most prevalent technique currently utilized to obtain the required microscopic parameters for DEM. This article initially introduces the development history of DEM calibration, then elaborates on the governing equations of DEM and the microscopic parameters required for calibration. Next, the principles of classical DEM calibration methods are explicated in detail, alongside the validation and discussion of their properties. Lastly, this study investigates the model dependence of DEM and presents guidance for the calibration application of large-scale simulations.