Orhotropic material property definition
Hi, Calculix has support of defining orthotropic material properties.
https://web.mit.edu/calculix_v2.7/CalculiX/ccx_2.7/doc/ccx/node193.html
Adding this capability to prepomax may be useful. I have checked the code. CAEModel>Materials>Elastic.cs is storing the data. Maybe we can convert this class to an abstract class and we can create 3 additional class that inherit the "Elastic" this probably cover the orthotropic material definition.
I think we also need to update the calculix writer class. If you are open to collobration. I think I can add this.