1. Adaptive DEM / FEM Coupling
International Center for Numerical Methods in Engineering (CIMNE) Barcelona, Spain

2. Definition of the coupling scheme
Penalty or Lagrange Multipliers
Overlapping or Not overlapping*
* Mesh generation condition for DEM/FEM interface

3. Elastic wave propagation 2D
Displacements

4. Three-point bending of a beam with a notch ( DEM/FEM )
Broken bonds
dem-fem-beam-frac3ps-bb.mpg

5. Study of rock excavation 2D
Equivalent stress distribution
CPU Time
DEM : 30 Hrs
DEM/FEM : 16 Hrs
dredge6-fem2-lag-damp-hms-3.mpg

6. Dynamic DEM / FEM coupling
Criteria ( FEM to DEM )
σ > α · σmax , α = [0.5, 1.0]
FEM with elastic behavior
Computational cost effect

7. Three-point bending of a beam with a notch
Max Stress

8. Three-point bending of a beam with a notch
Max Stress

9. Three-point bending of a beam with a notch
DEM connectivities

10. Unconfined compresion test 2D
Stress

11. Rock cutting 2D
Cohesion

12. Rock cutting 2D
Max stress

13. Rock cutting 2D
Forces evolution

14. Projectile impact 2D
Cohesion

15. Projectile impact 2D
Stress

16. 3D beam with a notch
cohesion

17. 3D beam with a notch
Interaction forces
FEM
DEM/FEM