I am looking into it Thomas. For a full 3D analysis we may need plots for shear utilisation (based on Mohr Coulomb, as described earlier, to check crushing and shear failure) and principal tensile stress fields (magnitude and direction). All of that can be displayed in Paraview through manipulation of available FC/CCX data. However, the issue I see is that this information still does not uniquely define required reinforcement percentages. Even if you would limit reinforcement to x, y and z directions only (which is not a necessary restriction), then you would still have freedom to choose more of one or the other to meet the tensile utilisation requirements. A simple plot of required reinforcement percentages in the 3 directions may therefore be out of reach, unless we make further constraining assumptions. In due course I hope to show this with the formulas. I am also looking through the literature on this.

So in summary, I think the Paraview challenge is perhaps not the biggest one