I'm doing some work on a composite structure which has a foam core, as the shapes are quite organic i designed it with surfaces, i was wondering if there is any way to fill an enclosed area, I need to offset the surfaces and then fill the enclosure between them, I't a huge pain extruding up to the surfaces and trying to create a solid that way as the thickness and shapes are extremely complex, Thicken is of no use, one of the biggest problems is this multi body part is for analysis in ansys and it wont be right off the bat so i will need to make changes and if i use the extrusion method its such a bodge job any changes to the surfaces basically means starting again creating the solid, which is really a long process, and it also means i cant update the analysis with the new geometry as all the solid faces have changed and any boundary conditions assocciated are in error, which not only means setting them up again it means i could make a mistake and not get an accurate comparison between the different studies.

Thanks for any help.