Extract forces on contact surfaces

PaulFlynn · February 2017

Hi, I'm new to Mecway, but have ANSYS experience. My question is how to extract the forces generated on a surface in a model with contact between bodies. The modelling and loading is pretty self-explanatory, but results from CalculiX don't appear to include forces on the contact. Is there a way to extract them as a file for further processing?

Paul

Andrea · February 2017

Do you mean the pressure contact?

*CONTACT OUTPUT
CDIS,CSTR

requests the storage of the relative contact displacements and contact stresses
in the .frd file

Sergio · February 2017

Hi, *CONTACT OUTPUT will generate a mixed ASCII binary .frd result file, not supported by Mecway, you must use *CONTACT FILE card in place.

Regards

PaulFlynn · February 2017

OK, I put the CONTACT FILE CDIS, CSTR command in the CCX custom step contents and the model runs, but where do the contact disp and pressures come out? I don't see anything different in MECWAY. Do I need a CalculiX reader?

Paul

Andrea · February 2017

Don't you see this?

PaulFlynn · February 2017

No. My screen stops at FORC_F3. See attachment. It shows the input file and the results screen

Paul

PaulFlynn · February 2017

OK. I took out the * and it works. Does the * make it a comment?

Andrea · February 2017

* identifies an INPUT DECK
If you omit * CCX doesn't recognize the command

Andrea · February 2017

But the right sintax is:

*CONTACT FILE
CDIS, CSTR

Try to write this

jvrajadell · February 2017

but, only in slave surfaces?

Sergio · February 2017

Yes!

PaulFlynn · February 2017

Sergio and Andrea

Thanks for your help. I got everything working.

One question. Is there a full list of CCX commands that I can refer to in the future? What is the source of the clip you posted?

Paul

Sergio · February 2017

The clip is from the Calculix documentation, there you have the full list of CCX cards:

http://www.dhondt.de/ccx_2.11.pdf

Regards

Mecway

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Extract forces on contact surfaces

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