Write a note on submodeling and substructuring.
Answers
Substructuring is a procedure that condenses a group of finite elements into one element represented as a matrix. This single matrix element is called a superelement.a finite element technique used to get more accurate results in a region of your model.
submoddeling-
Often in finite element analysis, the finite element mesh may be too coarse to produce satisfactory results in a region of interest, such as a stress concentration region.
The results away from this region, however, may be adequate.
To obtain more accurate results in such a region, you have two options:
re-analyze the entire model with greater mesh refinement, or
generate an independent, more finely meshed model of only the region of interest and analyze it.
Submodeling is also known as
the cut-boundary displacement method or
the specified boundary displacement method.
The cut boundary is the boundary of the submodel which represents a cut through the coarse model. Displacements calculated on the cut boundary of the coarse model are specified as boundary conditions for the submodel.