Reply To: MPC184 Elements on 3D Beam model (Problem: stresses are not uniform)

[peteroznewman]

Use the word Vertex when referring to the 3-2-1 method. Applying constraints to edges would not be a valid 3-2-1 method.
Using Rigid Elements on the edges of the section prevents the Poisson's Ratio expansion when the compression is applied, which generates a stress along the web and flange edges.
Use the Deformable type of Rigid Elements to fix this.