Michele De Giosa

OK I will try to be more specific. 
I created a structure, polycrystalline metal (with MultiScale.Sim), both 3D and 2D. 
Now my geometric problem requires me to insert some elements to simulate a structure, as if it had some defects interpreting grain boundaries, holidays or dislocations. 
For example, if you look at the figures below, the colour blue is what I want to achieve within my structure. 
Now, the question is: how do I implement this geometry?

While my work in Ansys, with MultScale, is below