FEM ConstraintForce/en: Difference between revisions

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|MenuLocation=Model → Mechanical Constraints → Constraint force
|MenuLocation=Model → Mechanical Constraints → Constraint force
|Workbenches=[[FEM_Workbench|FEM]]
|Workbenches=[[FEM_Workbench|FEM]]
|Shortcut=
|SeeAlso=[[FEM_ConstraintPressure|FEM ConstraintPressure]]
|SeeAlso=[[FEM_ConstraintPressure|FEM ConstraintPressure]]
}}
}}
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==Usage==
==Usage==


1) Applying a force in normal direction to a face
Applying a force to a face, line or point:
** In FEM workbench, click on [[File:FEM_ConstraintForce.svg|24px|Constraint Force]] or select {{KEY|Model}} → {{KEY|Mechanical Constraints}} → {{KEY|Constraint force}} to open Force Constraint properties dialog
* In FEM workbench, click on [[File:FEM_ConstraintForce.svg|24px|Constraint Force]] or select {{KEY|Model}} → {{KEY|Mechanical Constraints}} → {{KEY|Constraint force}} to open Force Constraint properties dialog.
* If you have Mesh displayed, you need to hide it (select the mesh object and press {{KEY|spacebar}} or right-click and select {{KEY|Hide item}}) and show the original model.
[[File:FEMForceConstraintProperties.PNG]]
* Click on a ''face'', ''line'' or ''point'' to which a force should be applied. It will appear in the list of geometrical objects.
** If you have Mesh displayed, you need to hide it (select the mesh object and press {{KEY|spacebar}} or right click and select {{KEY|Hide item}}) and show the original model.
* Fill in {{KEY|Load [N]}} with a force value in [N].
** Click on a ''face'' to which a force should be applied. It will appear in the list of geometrical objects.
* {{KEY|Direction}}: In a typical case, you'll leave this field empty to apply a force in the normal direction. You can revert the direction of the force by clicking {{KEY|Reverse direction}}. In other cases, you need to pick a face/plane or edge, which serves as reference for force direction.
** Fill in {{KEY|Line load}} with a force value in [N] (attention: ''Not'' in [N/m])
[[File:ApplyingForceToFace.PNG]]
[[File:FEM ConstraintForce example.JPG]]
* Click {{KEY|OK}} to finish the dialog and create {{KEY|[[File:FEM_ConstraintForce.svg|24px]] ConstraintForce}} object.
** {{KEY|Direction}}: In a typical case, you'll click this field empty to apply a force in normal direction to the face. You can revert the direction of the force by clicking {{KEY|Reverse direction}}. In other cases, you need to pick a face or plane, which is in normal to the force direction (it could differ from the face, to which the force is being applied)
** Click {{KEY|Close}} to finish the dialog and create {{KEY|[[File:FEM_ConstraintForce.svg|24px]] ConstraintForce}} object


==Notes==


Defined force is applied uniformly to selected objects. For example, if you define one force constraint with 200 N applied to two faces having the same area, each face will be uniformly loaded with 100 N.
2) Applying a force in to line in selected direction
** In FEM workbench, click on [[File:FEM_ConstraintForce.svg|24px|Constraint Force]] or select {{KEY|Model}} → {{KEY|Mechanical Constraints}} → {{KEY|Constraint force}} to open Force Constraint properties dialog
** If you have Mesh displayed, you need to hide it (select the mesh object and press {{KEY|spacebar}} or right click and select {{KEY|Hide item}}) and show the original model.
** Click on a ''line segment'' to which a force should be applied. It will appear in the list of geometrical objects.
** Fill in {{KEY|Area load}} with a force value in [N]
** {{KEY|Direction}}: Now, with line segment selected, it si likely that the force is applied in a wrong direction. We need to specify the direction by clicking the button {{KEY|Direction}} and then clicking a face pointing with its normal to the direction of the force (or reversed direction). Again, you can revert the direction of the force by clicking {{KEY|Reverse direction}}.
[[File:FEMforceonline.PNG]]
** Click {{KEY|Close}} to finish the dialog and create {{KEY|[[File:FEM_ConstraintForce.svg|24px]] ConstraintForce}} object





Revision as of 19:34, 8 November 2021

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FEM ConstraintForce

Menu location
Model → Mechanical Constraints → Constraint force
Workbenches
FEM
Default shortcut
None
Introduced in version
-
See also
FEM ConstraintPressure

Description

This command applies a force of given value [N] to selected target geometry.

Usage

Applying a force to a face, line or point:

  • In FEM workbench, click on Constraint Force or select ModelMechanical ConstraintsConstraint force to open Force Constraint properties dialog.
  • If you have Mesh displayed, you need to hide it (select the mesh object and press spacebar or right-click and select Hide item) and show the original model.
  • Click on a face, line or point to which a force should be applied. It will appear in the list of geometrical objects.
  • Fill in Load [N] with a force value in [N].
  • Direction: In a typical case, you'll leave this field empty to apply a force in the normal direction. You can revert the direction of the force by clicking Reverse direction. In other cases, you need to pick a face/plane or edge, which serves as reference for force direction.

  • Click OK to finish the dialog and create ConstraintForce object.

Notes

Defined force is applied uniformly to selected objects. For example, if you define one force constraint with 200 N applied to two faces having the same area, each face will be uniformly loaded with 100 N.