hi - i'm new to the site and not familiar with material science in particular, however i'm currently looking for some simulation-software for cellular solids/ porous materials/ foam which allows me to evaluate the differentiation of geometry without too much scripting/programming - could anyone please point me in the direction of software available at a reasonable price (as an academic/student licence)/shareware/freeware which has output formats such as STL (Stereolithography), OBJ, DXF, IGES ..

Many Thanks! 

doi:10.1016/j.engfracmech.2007.07.022