Universal Approach for DEM Parameters Calibration of Bulk Materials

Aleksei Boikov,Roman Savelev,Alexander Potapov,Vladimir Payor

doi:10.3390/sym13061088

Abstract

DEM parameters calibration is the most important step in preparing a DEM model. At the same time, the lack of a universal approach to DEM parameters calibration complicates this process. The paper presents the author’s approach to creating a universal calibration approach based on the physical meaning of the friction coefficients and conducting symmetrical experiments at full scale and in a simulation, as well as the implementation of the approach in the form of a physical test rig. Several experiments were carried out to determine the DEM parameters of six material–boundary pairs. The resulting parameters were adjusted using a refinement experiment. The results confirmed the adequacy of the developed approach, as well as its applicability in various conditions. The limitations of both the approach itself and its specific implementation in the form of a test rig were identified.

Highlights

DEM parameters calibration is the most important step in preparing a DEM model
Approaches to using the bulk calibration approach (BCA) method directly using the design of the experiment were considered [26]
The value is determined by the sliding time on a surface with a certain angle of repose (Figure 1a): Dynamic Friction (DF) = tg(∝) −

Summary

Introduction

DEM parameters calibration is the most important step in preparing a DEM model. At the same time, the lack of a universal approach to DEM parameters calibration complicates this process. The results confirmed the adequacy of the developed approach, as well as its applicability in various conditions. The limitations of both the approach itself and its specific implementation in the form of a test rig were identified. DEM codes of contact models and may affect the behavior of bulk materials in different ways, that is, they are code dependent [6,7]. Since the values of the friction coefficients (DEM parameters) significantly affect the behavior of bulk materials, in order to build an adequate model, they have to be calibrated [8,9,10]

Methods

Results

Discussion

Conclusion