Remove regions from the submodel that you are not interested in analyzing. Only the regions of interest should remain. You can use several techniques to remove regions from a part.
Use the cut tools in the Part module. For more information, see “Adding a cut feature,” Section 11.24.
Use the Repair toolset to remove faces. For more information, see “An overview of repair techniques,” Section 47.2.
You can delete the part in the Part module and create a new part with the same name. You can then create geometric features that represent the submodel; however, you must position the new features in the same location as the original part. For a discussion of the tolerances between the submodel and the global model, see “Submodeling,” Section 10.2.1 of the ABAQUS Analysis User's Manual. The new part and the original part must be created in three-dimensional modeling space.
Creating a new part is a useful technique for converting a shell global model to a solid submodel. You can delete the shell part from the copied model and create a new solid part in the same location. You must take care to ensure that the part defined in the solid submodel is contained within the part defined in the shell global model.