Applying a torque using FORCE and TRANSFORM constraints

About the development of the FEM module/workbench.

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KgoaOT
Posts: 66
Joined: Mon Jul 18, 2016 9:08 am

Applying a torque using FORCE and TRANSFORM constraints

Postby KgoaOT » Fri Dec 09, 2016 8:08 am

The transform constraint has been extended to allow for applied forces to be transformed into in a new coordinate system.

- start FreeCAD --> StartWB --> load "TorqueExample" file
TorqueExample.fcstd
(738.21 KiB) Downloaded 69 times
Essentially in this a example, a force is applied to the external surface of a pipe and then the coordinate system of the external surface is transformed into a cylindrical coordinate system. The direction of the applied force is in the global Y direction (this corresponds to the Tangential direction after the coordinate transformation).

Depicted below is pipe showing no displacement:
WithoutDisplacement.PNG
WithoutDisplacement.PNG (44.07 KiB) Viewed 703 times
Depicted below is pipe showing the displacement:
WithDisplacement.PNG
WithDisplacement.PNG (48.9 KiB) Viewed 703 times
The new branch can be found here:
https://github.com/makkemal/FreeCAD/tre ... traint/src
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bernd
Posts: 7890
Joined: Sun Sep 08, 2013 8:07 pm
Location: Zürich, Switzerland

Re: Applying a torque using FORCE and TRANSFORM constraints

Postby bernd » Sat Dec 10, 2016 8:03 pm

works great ! Added to my development branch for next FEM pull request.

https://github.com/berndhahnebach/FreeC ... meshregion