Body Load
Add a Body Load to domains for modeling volumetric loads.
Force
Select a Load type — Force per unit volume (the default), Total force, or for 2D components, Force per unit area.
Then enter values or expressions for the components in the matrix based on the selection and the space dimension.
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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.
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For Total force, COMSOL Multiphysics divides the total force by the volume of the domains where the load is active. For 2D components, and if Force per unit area is selected, the body load as force per unit volume is then the value of F divided by the thickness.
Load Type
variable
SI unit
Geometric Entity Level
Space Dimension (components)
Force per unit volume
FV
N/m3
domains
3D (x, y, z)
2D (x, y)
1D (x)
2D axisymmetric (r, z)
1D axisymmetric (r)
Force per unit area
FA
N/m2
domains
2D (x, y)
Total force
Ftot
N
domains
3D (x, y, z)
2D (x, y)
1D (x)
2D axisymmetric (r, z)
1D axisymmetric (r)
Location in User Interface
Context Menus
Solid Mechanics > Volume Forces > Body Load
Ribbon
Physics Tab with Solid Mechanics selected:
Domains > Volume Forces > Body Load