FEM ConstraintPressure: Difference between revisions

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{{Docnav
{{Docnav
|[[FEM_ConstraintForce|Constraint force]]
|[[FEM_ConstraintForce|Constraint force]]
|[[FEM_ConstraintSelfWeight|Constraint self weight]]
|[[FEM_ConstraintCentrif|Constraint centrif]]
|[[FEM_Module|FEM]]
|[[FEM_Workbench|FEM]]
|IconL=FEM_ConstraintForce.svg
|IconL=FEM_ConstraintForce.svg
|IconR=FEM_ConstraintSelfWeight.svg
|IconR=FEM_ConstraintCentrif.svg
|IconC=Workbench_FEM.svg
|IconC=Workbench_FEM.svg
}}
}}
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{{GuiCommand
{{GuiCommand
|Name=FEM ConstraintPressure
|Name=FEM ConstraintPressure
|MenuLocation=Model → Mechanical ConstraintsConstraint pressure
|MenuLocation=Model → Mechanical boundary conditions and loadsPressure load
|Workbenches=[[Fem_Workbench|FEM]]
|Workbenches=[[FEM_Workbench|FEM]]
|SeeAlso=[[FEM_ConstraintForce|FEM Constraint force]]
|SeeAlso=[[FEM_ConstraintForce|FEM Constraint force]]
}}
}}
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<!--T:6-->
<!--T:6-->
Applies a pressure constraint to a face.
Applies a pressure load to a face.


==Usage== <!--T:3-->
==Usage== <!--T:3-->
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<!--T:7-->
<!--T:7-->
# There are several ways to invoke the command:
# There are several ways to invoke the command:
#* Press the {{Button|[[Image:FEM_ConstraintPressure.svg|16px]] [[FEM_ConstraintPressure|ConstraintPressure]]}} button.
#* Press the {{Button|[[Image:FEM_ConstraintPressure.svg|16px]] [[FEM_ConstraintPressure|Pressure load]]}} button.
#* Select the {{MenuCommand|Model → Mechanical Constraints → [[Image:FEM_ConstraintPressure.svg|16px]] Constraint pressure}} option from the menu.
#* Select the {{MenuCommand|Model → Mechanical boundary conditions and loads → [[Image:FEM_ConstraintPressure.svg|16px]] Pressure load}} option from the menu.
# Click on {{Button|Add reference}} and select face in the [[[[3D_view|3D view]].
# Click on {{Button|Add}} and select face in the [[3D_view|3D view]].
# Edit appropriate window to specify pressure load in MPa.
# Edit appropriate window to specify pressure load in MPa.
# Tick box to reverse direction if necessary.
# Tick box to reverse direction if necessary.
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<!--T:8-->
<!--T:8-->
* Distribution of pressure on face is always uniform and always perpendicular to face.
* Distribution of the pressure on a face is always uniform and always perpendicular to the face.


<!--T:13-->
<!--T:13-->
* {{VersionMinus|0.21}}: Pressure load can be applied to shells but only when [[FEM_MeshGmshFromShape|Gmsh]] is used for meshing and group meshing is set to true. It is hardcoded as true so the user doesn't have to worry about that. However, due to a bug, pressure load may require remeshing to work on shells.
* Pressure on faces: https://tracker.freecadweb.org/view.php?id=3050
* This feature uses the [https://web.mit.edu/calculix_v2.7/CalculiX/ccx_2.7/doc/ccx/node190.html *DLOAD card in CalculiX].




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{{Docnav
{{Docnav
|[[FEM_ConstraintForce|Constraint force]]
|[[FEM_ConstraintForce|Constraint force]]
|[[FEM_ConstraintSelfWeight|Constraint self weight]]
|[[FEM_ConstraintCentrif|Constraint centrif]]
|[[FEM_Module|FEM]]
|[[FEM_Workbench|FEM]]
|IconL=FEM_ConstraintForce.svg
|IconL=FEM_ConstraintForce.svg
|IconR=FEM_ConstraintSelfWeight.svg
|IconR=FEM_ConstraintCentrif.svg
|IconC=Workbench_FEM.svg
|IconC=Workbench_FEM.svg
}}
}}
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{{FEM Tools navi{{#translation:}}}}
{{FEM Tools navi{{#translation:}}}}
{{Userdocnavi{{#translation:}}}}
{{Userdocnavi{{#translation:}}}}
{{clear}}

Latest revision as of 08:27, 27 February 2024

FEM ConstraintPressure

Menu location
Model → Mechanical boundary conditions and loads → Pressure load
Workbenches
FEM
Default shortcut
None
Introduced in version
-
See also
FEM Constraint force

Description

Applies a pressure load to a face.

Usage

  1. There are several ways to invoke the command:
    • Press the Pressure load button.
    • Select the Model → Mechanical boundary conditions and loads → Pressure load option from the menu.
  2. Click on Add and select face in the 3D view.
  3. Edit appropriate window to specify pressure load in MPa.
  4. Tick box to reverse direction if necessary.

Notes

  • Distribution of the pressure on a face is always uniform and always perpendicular to the face.
  • version 0.21 and below: Pressure load can be applied to shells but only when Gmsh is used for meshing and group meshing is set to true. It is hardcoded as true so the user doesn't have to worry about that. However, due to a bug, pressure load may require remeshing to work on shells.
  • This feature uses the *DLOAD card in CalculiX.