peteroznewman
Subscriber
In Workbench, under the Mesh branch of the outline, in the Details window is Element Order. That is where you can change the global setting as either Linear or Quadratic. As you note, you can override the global setting for a particular body by applying a Mesh Control called Body Sizing.
The default setting for Meshing in Static Structural analysis is Quadratic elements. This is the best choice when Tetrahedral elements are meshing solid bodies. This is a good choice for shell elements on surface bodies, especially when there are curved edges.
Explicit Dynamics requires Linear elements, and if you use that analysis, the global setting under Mesh will create linear elements.
Some Static Structural analyses with nonlinear hyperelastic materials will have better convergence with linear elements than quadratic elements.
Some Static Structural analyses with frictional contact will have better convergence with linear elements than quadratic elements.