Here is some results of our numerical simulations.

The simulation of a brittle crack in Iron-alpha with rigid BC. Fixing the positions of the atoms at the boundary produce a great amount of reflection, which later will alter the crack speed.

The simulation of a brittle crack with absorbing BC. In this case, the boundary reflection has been minimized, and the results agree well with a simulation on a much larger sample.

The simulation of an edge dislocation in Iron-alpha with rigid BC. Fixing the positions of the atoms at the boundary produce a great amount of reflection, which later will affect the propagation of the dislocation core.

The simulation of an edge dislocation with absorbing BC. In this case, the boundary reflection has been minimized, and the results agree well with a simulation on a much larger sample.

The simulation of an edge dislocation with absorbing BC. In this case, the boundary reflection has been minimized, and the results agree well with a simulation on a much larger sample.