So I am using ABAQUS. I have some irregular geometry structures, with hyperelastic material properties fitted to a marlow model, using ABAQUS' material evaluation package. I am trying to mesh these irregular geometries with a hexahedral mesh. This is because when I use a tet mesh, the model will not converge. I believe this is because my material deforms greatly, so the hexahedral advanced hourglass controls are needed. I have tested the hex mesh with a uniform geometry structure, of similar proportions, using the hexahedral mesh with advanced hourglass controls and the analysis ran exceptionally well. I believe the key to my model is to incorporate this advanced hourglass control. But I am unable to mesh my irregular structures with a hex mesh. The tet mesh look great for my irregular geometries, however, there is no hourglass control parameter when using a tet mesh. I am wondering if there is a way i can account for the hourglass effect with a tet mesh, OR if there is a way I can get a hex mesh to work for my irregular structures. Any help would be GREATLY appreciated. I have both SAT files and IGES files for both structures, if anyone has any ideas, please let me know.
Thanks a bunch,