Identification of micro parameters for discrete element simulation of agglomerates

First published in
AIP conference proceedings  
Number in series
1542, issue 1
Start Page
871
End Page
874
Citation
AIP Conference Proceedings (1542): 871-874 (2013)
Contribution to Conference
7th International Conference on Micromechanics of Granular Media 2013  
Publisher DOI
10.1063/1.4812070
Scopus ID
2-s2.0-84880760804
Publisher
American Institute of Physics
The mechanical behaviour of solid particles like agglomerates, granules or crystals strongly depends on their micro structure, e.g. structural defects and porosity. In order to model the mechanical behaviour of these inhomogeneous media the discrete element method has been proven to be an appropriate tool. The model parameters used are typically micro parameters like bond stiffness, particle-particle contact stiffness, strength of the bonds. Due to the lack of general methods for a direct micro parameter determination, normally laborious parameter adaptation has to be done in order to fit experiment and simulation. In this contribution a systematic and automatic way for parameter adaptation using real experiments is proposed. Due to the fact, that discrete element models are typically systems of differential equations of very high order, gradient based methods are not suitable. Hence, the focus will be on derivative free methods. © 2013 AIP Publishing LLC.
Subjects
discrete element method
agglomerate
breakage
parameter identification
DDC Class
530: Physik