Face Load (Thin Layer)

Add a node to apply tractions or pressure on boundaries where the material is active.

The is selected by default. The list contains all applicable coordinate systems in the model. Prescribed loads are specified along the axes of this coordinate system.

Force

Select the — , , or . is also available for 2D components. Then enter values or expressions for the boundary load components based on the selection and the space dimension.

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For , the traction components are given explicitly.

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For , the total force is divided by the area of the boundaries where the load is active. Then it is applied in the same way as for a . When working with curved boundaries or local coordinate systems, use this option carefully, as the result is not always intuitive.

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For , 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 thin layer. 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.

Table 4-7:
Load Type	variable	SI unit	Geometric Entity Level	Space Dimension (components)
Force per unit area	FA	N/m2	boundaries	3D (x, y, z) 2D (x, y) 2D axisymmetric (r, z)
Force per unit length	FL	N/m	boundaries	2D (x, y)
Total force	Ftot	N	boundaries	3D (x, y, z) 2D (x, y) 2D axisymmetric (r, z)
Pressure	p	Pa	boundaries	3D (x, y, z) 2D (x, y) 2D axisymmetric (r, z)