Compression Dominated Structure
Structural efficiency is a key concern when dealing with compression-dominated structures. Geometry is a critical element for the load carrying capability of these structures. This is not the case for tension dominated structure. These compression forces are usually a result of bending, where one side of the section is in tension and the other side is in compression as shown here.
There are many structures in a BIW that are subject to bending, but of note are the roof rail and B-pillar. The roof rail will see high bending stresses in load cases such as roof crush shown here, side pole impact and small offset. The B-pillar will see high bending stresses in load cases such as roof crush and side impact shown here.