Model in figure 11 and 12 has the Dirichlet boundaries on bottom and top. The bottom boundary is set to be fixed and the top boundary has a downward displacement with magnitude of 5. In figure 11, the upper part of the structure has the maximum displacement, yet the strain is accumulated mostly along the middle where the structure is much thinner.  With wider geometry, the upper part is harder to deform. Figure 12 further shows that the yielding will first occur at the middle part of the whole structure.