Boundary Load
Use a Boundary Load to apply tractions or pressure to boundaries.
Layer Selection
This section is only present in the in the Layered Shell interface, where it is described in the documentation for the Boundary Load node.
Force
Select a Load typeForce per unit area (the default), Pressure, Total force, or for 2D components, Force per unit length. Then enter values or expressions for the components in the matrix based on the selection and the space dimension.
For Force per unit area, the body load as force per unit volume is then the value of F divided by the thickness.
For Total force, COMSOL Multiphysics then divides the total force by the area of the surfaces where the load is active.
For Pressure, a scalar input is given, and the orientation of the load is given by the normal to the boundary. The pressure is positive when directed toward the solid. In a geometrically nonlinear analysis, the current surface normal and area are used.
After selecting a Load type, the Load list normally only contains User defined. When combining with another physics interface that can provide this type of load, it is also possible to choose a predefined load from this list.
FA
N/m2
FL
Ftot
You can add the Phase subnode to specify the phase of this load in a frequency domain analysis.
Location in User Interface
Context Menus
Solid Mechanics>Boundary Load
Layered Shell>Boundary Load
Multibody Dynamics>Boundary Load
Ribbon
Physics tab with Solid Mechanics or Multibody Dynamics selected:
Boundaries>Solid Mechanics>Body Load
Boundaries>Multibody Dynamics>Body Load
Physics tab with Layered Shell selected:
Edges>Layered Shell>Boundary Load