Pressure-overclosure=Tabular

1

Hi All,
normally i am a user of Abaqus. I am trying to understand the opportunity to use Calculix in my analysis.
One of the problems i have to face is the analysis of the contact between two components (to see if it opens or slips). In Abaqus, i use the following script:
*SURFACE INTERACTION, NAME = FRIC-slip
*FRICTION
0.1 , 0.0 ,0.0 ,0.0
*SURFACE BEHAVIOR, PRESSURE-OVERCLOSURE=TABULAR
0.0, -5.0
0.01, 0.0
100.0, 0.001
*Contact pair, Interaction=FRIC-slip, Type=Surface to surface, Adjust=0.01
cover-housing, housing-cover

and it converges without issues, this does not happen in Calculix. In Calculix i use:

*Surface interaction, Name=FRIC-slip
*Surface behavior, Pressure-overclosure=Tabular
0.0, -5.0
0.01, 0.0
100.0, 0.001
*Friction
0.1
*Contact pair, Interaction=FRIC-slip, Type=Surface to surface, Adjust=0.01
cover-housing, housing-cover

The cover is in aluminum and the housing in steel; the step is:
*Step, Inc=100
*Static, Solver=Pardiso
0.01, 1, 1E-05, 0.1

Analyzing the *.sta file:
SUMMARY OF JOB INFORMATION
STEP INC ATT ITRS TOT TIME STEP TIME INC TIME
1 1 1U 60 0.000000E+00 0.000000E+00 0.100000E-01
1 1 2U 60 0.000000E+00 0.000000E+00 0.100000E-01
1 1 3U 60 0.000000E+00 0.000000E+00 0.500000E-02
1 1 4U 60 0.000000E+00 0.000000E+00 0.250000E-02
1 1 5U 60 0.000000E+00 0.000000E+00 0.125000E-02
1 1 6U 60 0.000000E+00 0.000000E+00 0.625000E-03

I thank anyone who can help me

Regards
Franco

2

Maybe the problem is not related to contact definition so difficult to say with the information provided.

3

Does it work with different contact properties (like default hard or linear contact) ? Is the model properly constrained. It’s often a matter of initial rigid body motions.

4

It works with hard contact.
See picture for FE model description

FE model
FE model862×489 64.4 KB

5

Notice that in abaqus there is linear extrapolation of the table but in ccx is constant

1000028848
10000288481612×720 246 KB

6