I have a structural mechanical problem, where i try to calculate the strain field in the modelled material. I simplified the problem in the following example: There is a material with two phases, where the modelled area is periodical in all direction. Needs[“NDSolve`FEM`”] spher[{x0_,y0_,z0_},r_] := (x – x0)^2 + (y – y0)^2 + (z –Read more