Institute of Fundamental Technological Research
Polish Academy of Sciences

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Gernot Beer

University of Newcastle (AU)


Recent publications
1.  Rojek J., Karlis G.F., Malinowski L.J., Beer G., Setting up virgin stress conditions in discrete element models, COMPUTERS AND GEOTECHNICS, ISSN: 0266-352X, DOI: 10.1016/j.compgeo.2012.07.009, Vol.48, pp.228-248, 2013

Abstract:
In the present work, a methodology for setting up virgin stress conditions in discrete element models is proposed. The developed algorithm is applicable to discrete or coupled discrete/continuum modeling of underground excavation employing the discrete element method (DEM). Since the DEM works with contact forces rather than stresses there is a need for the conversion of pre-excavation stresses to contact forces for the DEM model. Different possibilities of setting up virgin stress conditions in the DEM model are reviewed and critically assessed. Finally, a new method to obtain a discrete element model with contact forces equivalent to given macroscopic virgin stresses is proposed. The test examples presented show that good results may be obtained regardless of the shape of the DEM domain.

Keywords:
Discrete element method, Initial stress conditions, Virgin stresses, Discrete/continuum modeling

Affiliations:
Rojek J. - IPPT PAN
Karlis G.F. - Institute for Structural Analysis (DE)
Malinowski L.J. - other affiliation
Beer G. - University of Newcastle (AU)

Conference abstracts
1.  Pereira A., Rojek J., Barros G., Beer G., DEM-BEM Coupling in Time Domain, COUPLED PROBLEMS 2015, VI International Conference on Coupled Problems in Science and Engineering, 2015-05-01/05-20, Wenecja (IT), pp.1, 2015
2.  Karlis G., Malinowski L., Beer G., Rojek J., Iterative coupling of DEM-BEM regions with an overlapping FEM zone, 8th Workshop on Fast Boundary Element Methods in Industrial Applications, 2010-09-30/10-03, Söllerhaus (DE), pp.1, 2010

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