no proper input for contact stiffness

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uwestoehr
Posts: 1923
Joined: Sun Jan 27, 2019 3:21 am

no proper input for contact stiffness

Postby uwestoehr » Wed Feb 06, 2019 1:02 am

Word size of FreeCAD: 64-bit, Version: 0.18.15780 (Git)
Build type: Release
Branch: master
Hash: f94e76c1116ec3b818961ff65131b3d86fa5b95e
Python version: 2.7.14
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 7.2.0

- create a contact constraint
- try to enter e.g. a contact stiffness of 500 MPa, so for example try to type in "500e6"

result: you cannot enter numbers in the form "xxey" or "xxe+y" or "xxGPa"

It would be nice if one sees for the constraint values the unit to avoid mistakes and it would be nice if inputs using exponents would be allowed.

In the constraint Pressure acting on a face this is already implemented nicely. So it would be nice if this is also taken for the contact constraint.
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bernd
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Location: Zürich, Switzerland

Re: no proper input for contact stiffness

Postby bernd » Wed Feb 06, 2019 10:40 am

I fully agree with you Uwe. The TaskPanels of the constraint objects for sure need some love. Feel free to open a bug report in this regard.
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uwestoehr
Posts: 1923
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Re: no proper input for contact stiffness

Postby uwestoehr » Thu Feb 07, 2019 2:36 am

bernd wrote:
Wed Feb 06, 2019 10:40 am
Feel free to open a bug report in this regard.
Done: issue #3819
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bernd
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Location: Zürich, Switzerland

Re: no proper input for contact stiffness

Postby bernd » Sun Feb 24, 2019 8:59 pm

Rana
Posts: 22
Joined: Tue Oct 01, 2019 6:37 pm

Re: no proper input for contact stiffness

Postby Rana » Thu Oct 15, 2020 10:04 am

It is related to contact stiffness unit in FEM workbench ( FreeCAD 0.19 - 22611). As per Calculix manual it should be Force]/[Length] ^3.
In FEM workbench, it shows MPa. It should be updated to avoid confusion.

Thanks.
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Kunda1
Posts: 8671
Joined: Thu Jan 05, 2017 9:03 pm

Re: no proper input for contact stiffness

Postby Kunda1 » Sat Oct 17, 2020 12:45 am

bernd wrote:
Sun Feb 24, 2019 8:59 pm
:bell:
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