Discrete models for geomaterials

In the present contribution different discrete element models (DEM) for the simulation of cohesive geomaterials like concrete. ceramics or marl will be presented. Starting from a basic polygonal two-dimensional DEM model for noncohesive granular materials. more complex models for cohesive materials are obtained by inclusion of beam or interface elements between corresponding particles, The last step in the series of increasing complexity is the realization of a microstructure-based simulation environment which utilizes the enhanced DEM models. With growing model complexity a wide variety of failure features of geornaterials can be represented. A validation of these discrete models with regard to qualitative and quantitative aspects enriches the plan of the paper. Thereby, extracts of the extensive simulation program are reported in order to clarify the respective subject matter.