2. Multi-Branch and Multi-Patch Transformations

The solid mechanics box beam test checks structures defined in branch-local systems and assembled to a global system. The shell model consist of a box beam modeled (1) with 4 branches, each of them containing one patch and (2) with 1 branch and 4 patches.The base plate (branch 1 or patch 1) is formulated in the global x-y plane. The other 3 branches or patches are translated and rotated copies of branch 1. Analysis is linear elastic.

Deformed and undeformed box beam structure

Figure 125. Deformed and undeformed box beam structure