95 lines
9.4 KiB
HTML
95 lines
9.4 KiB
HTML
<html><head><title>FEM ConstraintForce/fr</title><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><link type='text/css' href='wiki.css' rel='stylesheet'></head><body><h1>FEM ConstraintForce/fr</h1></div>
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<div id="mw-content-text" lang="fr" dir="ltr" class="mw-content-ltr"><hr/><div class="mw-parser-output"><div id="itsfree" style="text-align:center; background:#FDE0A8;margin:1em 7em;padding:0.5em 2em;border:2px solid #FF5706;">
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<p>This documentation is not finished. Please help and contribute documentation.
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</p><p>See <a href="Draft_ShapeString.html" title="Draft ShapeString">Draft ShapeString</a> for good documented Command. <a href="Gui_Command.html" title="Gui Command">Gui Command</a> gives an overview over commands. And see <a href="List_of_Commands.html" class="mw-redirect" title="List of Commands">List of Commands</a> for other commands.
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</p><p>Go to <a rel="nofollow" class="external text" href="Help_FreeCAD.html">Help FreeCAD</a> to contribute.
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</p>
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</div>
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<table class="fcinfobox wikitable ct" >
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<tr>
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<td class="ctTitle">
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<h3><span class="mw-headline" id="FEM_ConstraintForce"><a href="https://www.freecadweb.org/wiki/index.php?title=File:FEM_ConstraintForce.png" class="image"><img alt="FEM ConstraintForce.png" src="32px-FEM_ConstraintForce.png" width="32" height="32" srcset="/wiki/images/thumb/3/35/FEM_ConstraintForce.png/48px-FEM_ConstraintForce.png 1.5x, /wiki/images/3/35/FEM_ConstraintForce.png 2x" /></a> FEM ConstraintForce</span></h3>
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</td></tr>
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<tr>
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<th class="ctOdd">Emplacement du menu
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</th></tr>
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<tr>
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<td class="ctEven">Model → Mechanical Constraints → Constraint force
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</td></tr>
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<tr>
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<th class="ctOdd">Ateliers
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</th></tr>
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<tr>
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<td class="ctEven"><a href="https://www.freecadweb.org/wiki/index.php?title=Fem_Workbench/fr" class="mw-redirect" title="Fem Workbench/fr">FEM</a>
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</td></tr>
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<tr>
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<th class="ctOdd">Raccourci par défaut
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</th></tr>
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<tr>
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<td class="ctEven">
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</td></tr>
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<tr>
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<th class="ctOdd">Voir aussi
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</th></tr>
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<tr>
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<td class="ctEven"><a href="https://www.freecadweb.org/wiki/index.php?title=FEM_tutorial/fr" title="FEM tutorial/fr">FEM tutorial</a>
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</td></tr>
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<tr>
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<td class="ctToc"><br /><div id="toc" class="toc"><div class="toctitle"><h2>Contents</h2></div>
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<ul>
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<li class="toclevel-1"><a href="#FEM_ConstraintForce"><span class="tocnumber">1</span> <span class="toctext">FEM ConstraintForce</span></a></li>
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<li class="toclevel-1 tocsection-1"><a href="#Description"><span class="tocnumber">2</span> <span class="toctext">Description</span></a></li>
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<li class="toclevel-1 tocsection-2"><a href="#Utilisation"><span class="tocnumber">3</span> <span class="toctext">Utilisation</span></a></li>
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</ul>
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</div>
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</td></tr></table>
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<p><br />
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</p><p><br />
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</p>
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<h2><span class="mw-headline" id="Description">Description</span></h2>
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<p>This command applies a force of given value [N] to selected target geometry.
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</p>
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<h2><span class="mw-headline" id="Utilisation">Utilisation</span></h2>
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<p>1) Applying a force in normal direction to a face
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</p>
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<ul><li><ul><li> In FEM workbench, click on <a href="https://www.freecadweb.org/wiki/index.php?title=File:Fem-constraint-force.svg" class="image" title="Constraint Force"><img alt="Constraint Force" src="Fem-constraint-force.svg" width="24" height="24" /></a> or select <span style="background: #DDDDDD; border: 1px solid #888888; padding: 0px 5px 1px 5px;">Model</span> → <span style="background: #DDDDDD; border: 1px solid #888888; padding: 0px 5px 1px 5px;">Mechanical Constraints</span> → <span style="background: #DDDDDD; border: 1px solid #888888; padding: 0px 5px 1px 5px;">Constraint force</span> to open Force Constraint properties dialog</li></ul></li></ul>
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<p><a href="https://www.freecadweb.org/wiki/index.php?title=File:FEMForceConstraintProperties.PNG" class="image"><img alt="FEMForceConstraintProperties.PNG" src="FEMForceConstraintProperties.PNG" width="600" height="346" /></a>
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</p>
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<ul><li><ul><li> If you have Mesh displayed, you need to hide it (select the mesh object and press <span style="background: #DDDDDD; border: 1px solid #888888; padding: 0px 5px 1px 5px;">spacebar</span> or right click and select <span style="background: #DDDDDD; border: 1px solid #888888; padding: 0px 5px 1px 5px;">Hide item</span>) and show the original model.</li>
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<li> Click on a <i>face</i> to which a force should be applied. It will appear in the list of geometrical objects.</li>
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<li> Fill in <span style="background: #DDDDDD; border: 1px solid #888888; padding: 0px 5px 1px 5px;">Line load</span> with a force value in [N] (attention: <i>Not</i> in [N/m])</li></ul></li></ul>
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<p><a href="https://www.freecadweb.org/wiki/index.php?title=File:ApplyingForceToFace.PNG" class="image"><img alt="ApplyingForceToFace.PNG" src="ApplyingForceToFace.PNG" width="588" height="267" /></a>
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</p>
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<ul><li><ul><li> <span style="background: #DDDDDD; border: 1px solid #888888; padding: 0px 5px 1px 5px;">Direction</span>: 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 <span style="background: #DDDDDD; border: 1px solid #888888; padding: 0px 5px 1px 5px;">Reverse direction</span>. 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)</li>
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<li> Click <span style="background: #DDDDDD; border: 1px solid #888888; padding: 0px 5px 1px 5px;">Close</span> to finish the dialog and create <span style="background: #DDDDDD; border: 1px solid #888888; padding: 0px 5px 1px 5px;"><a href="https://www.freecadweb.org/wiki/index.php?title=File:FEM_ConstraintForce.png" class="image"><img alt="FEM ConstraintForce.png" src="24px-FEM_ConstraintForce.png" width="24" height="24" srcset="/wiki/images/thumb/3/35/FEM_ConstraintForce.png/36px-FEM_ConstraintForce.png 1.5x, /wiki/images/thumb/3/35/FEM_ConstraintForce.png/48px-FEM_ConstraintForce.png 2x" /></a> ConstraintForce</span> object</li></ul></li></ul>
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<p><br />
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2) Applying a force in to line in selected direction
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</p>
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<ul><li><ul><li> In FEM workbench, click on <a href="https://www.freecadweb.org/wiki/index.php?title=File:FEM_ConstraintForce.png" class="image" title="Constraint Force"><img alt="Constraint Force" src="24px-FEM_ConstraintForce.png" width="24" height="24" srcset="/wiki/images/thumb/3/35/FEM_ConstraintForce.png/36px-FEM_ConstraintForce.png 1.5x, /wiki/images/thumb/3/35/FEM_ConstraintForce.png/48px-FEM_ConstraintForce.png 2x" /></a> or select <span style="background: #DDDDDD; border: 1px solid #888888; padding: 0px 5px 1px 5px;">Model</span> → <span style="background: #DDDDDD; border: 1px solid #888888; padding: 0px 5px 1px 5px;">Mechanical Constraints</span> → <span style="background: #DDDDDD; border: 1px solid #888888; padding: 0px 5px 1px 5px;">Constraint force</span> to open Force Constraint properties dialog</li>
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<li> If you have Mesh displayed, you need to hide it (select the mesh object and press <span style="background: #DDDDDD; border: 1px solid #888888; padding: 0px 5px 1px 5px;">spacebar</span> or right click and select <span style="background: #DDDDDD; border: 1px solid #888888; padding: 0px 5px 1px 5px;">Hide item</span>) and show the original model.</li>
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<li> Click on a <i>line segment</i> to which a force should be applied. It will appear in the list of geometrical objects.</li>
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<li> Fill in <span style="background: #DDDDDD; border: 1px solid #888888; padding: 0px 5px 1px 5px;">Area load</span> with a force value in [N]</li>
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<li> <span style="background: #DDDDDD; border: 1px solid #888888; padding: 0px 5px 1px 5px;">Direction</span>: 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 <span style="background: #DDDDDD; border: 1px solid #888888; padding: 0px 5px 1px 5px;">Direction</span> 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 <span style="background: #DDDDDD; border: 1px solid #888888; padding: 0px 5px 1px 5px;">Reverse direction</span>. </li></ul></li></ul>
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<p><a href="https://www.freecadweb.org/wiki/index.php?title=File:FEMforceonline.PNG" class="image"><img alt="FEMforceonline.PNG" src="FEMforceonline.PNG" width="563" height="423" /></a>
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</p>
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<ul><li><ul><li> Click <span style="background: #DDDDDD; border: 1px solid #888888; padding: 0px 5px 1px 5px;">Close</span> to finish the dialog and create <span style="background: #DDDDDD; border: 1px solid #888888; padding: 0px 5px 1px 5px;"><a href="https://www.freecadweb.org/wiki/index.php?title=File:FEM_ConstraintForce.png" class="image"><img alt="FEM ConstraintForce.png" src="24px-FEM_ConstraintForce.png" width="24" height="24" srcset="/wiki/images/thumb/3/35/FEM_ConstraintForce.png/36px-FEM_ConstraintForce.png 1.5x, /wiki/images/thumb/3/35/FEM_ConstraintForce.png/48px-FEM_ConstraintForce.png 2x" /></a> ConstraintForce</span> object</li></ul></li></ul>
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<p><br />
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</p>
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<div style="clear:both"></div>
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</div>
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</div>
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</div><div class="printfooter">
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Online version: "<a dir="ltr" href="https://www.freecadweb.org/wiki/index.php?title=FEM_ConstraintForce/fr&oldid=267204">http://www.freecadweb.org/wiki/index.php?title=FEM_ConstraintForce/fr&oldid=267204</a>"</div>
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<h2>Navigation menu</h2>
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