Using Contact with CalculiX 1.6?

[OnlineFEASolver]

I am unable to get some really simple contact models in Calculix 1.6 to converge. Has anyone had success with this new feature? It looks very promising. I can paste my simple input deck if you want to give it a try.

Principal -

http://www.OnlineFEASolver.com

General FEA Consulting Services

 

[pja]

Have you posted this on the Calculix newsgroup on yahoo egroups? The developers of the code post frequent the group.

 

[OnlineFEASolver]

I have posted there, but Guido I think is busy so is not able to reply to all messages there. Here is my input deck:

I am tryng to run a simpler version of the contac2.inp model that is in the test folder. I converted the elments to C3D8 and just defined contact on the last two elements of the beams.

However the model is unable to converge. Here is the relevant portion of my input deck:

*SURFACE,NAME=Smast
58, S6
60, S6
62, S6
64, S6
*SURFACE,NAME=Sslav,TYPE=NODE
203,205,222
*CONTACT PAIR,INTERACTION=SI1
Sslav,Smast
*SURFACE INTERACTION,NAME=SI1
*SURFACE BEHAVIOR
4.6e-3,4.
*STEP,NLGEOM,INC=100
*STATIC
*BOUNDARY
Nfix,1,3
*CLOAD
496,2,250
*NODE FILE
U
*EL FILE
S

Principal -

http://www.OnlineFEASolver.com

General FEA Consulting Services

 

[OnlineFEASolver]

I figured my problem out. When I converted from 20 node to
8 node bricks, the master contact surface element side
changed from S6 to S4 !










Principal -

http://www.OnlineFEASolver.com

General FEA Consulting Services