den drop in the load that is associated with either no cracking (42 kN) or damage in the specimens arms (126 kN). For an axial force larger than 200 kN, failure takes place in the contact area of the punch and the specimen. Finally, for the test an axial load of 210 kN was chosen. In this case the specimens fails as required, and the numerical prediction is met by the test. Figure 1. Some possibilities for defining a neighborhood in conventional equidistant cellular automata (left) and in random grid cellular automata (right).