Beam–Beam Cross Section Coupling
Use the Beam–Beam Cross Section Coupling to transfer the results from a Beam Interface or a Pipe Mechanics interface to a Beam Cross Section interface for visualization. You can add more than one Beam Cross Section–Beam Coupling node, but they should have different selections of cross sections in the Beam Cross Section interface.
The location, the orientation of the cross section, and the direction of its extrusion along the beam axis are independent of how the actual beam is located.
This multiphysics coupling is only available in 3D.
The Beam–Beam Cross Section Coupling node is only available with some COMSOL products (see https://www.comsol.com/products/specifications/)
Boundary Selection
Select the boundaries that represent the current cross section in the Beam Cross Section interface. This means that the selection should be identical to the selection in a corresponding Homogeneous Cross Section node.
Edge Selection, Beam
Select the edges of the beams, for which the stress plots are to be made. Normally, these beams should have the same cross section as in the selected boundaries. It is however only the section forces that are transferred to the Beam Cross Section interface. It is thus possible to view the stress distribution for any cross section, with a given set of section forces.
The selected edges must form a straight line. In the Beam Cross Section, the thickness property of the layered material must be set equal to the total length of the selected edges, in order for the results to be mapped.
Beam Origin
Select the point on the beam edge that should be treated as start point when mapping the results to the Beam Cross Section interface.
Coupled Interfaces
Select the Beam Cross Section interface to couple.
Select the Beam interface to couple. This can be either a Beam interface or a Pipe Mechanics Interface.
Beam Properties
This section is related to the fact that the Beam Cross Section interface uses the layered technology. You will typically not need to change the settings.
Advanced
Enter an Extrapolation tolerance. This is the tolerance used in the extrusion coupling operator that maps between the physical beam and the axial coordinate in the Beam Cross Section interface.