Extract forces on contact surfaces

PaulFlynn

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

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

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

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

Don't you see this?

PaulFlynn

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

Paul

PaulFlynn

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

Andrea

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

Andrea

But the right sintax is:

*CONTACT FILE
CDIS, CSTR

Try to write this

jvrajadell

but, only in slave surfaces?

Sergio

Yes!

PaulFlynn

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

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