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Contact - error message

Contact - error message

Contact - error message

(OP)
I have simulated a simple contact - ball and plate. Contact is in one point and i have got nice results. But when i wonted to include
motion in one direction in the new step i stuck with error msg.
I tried to increase number of min.time increment, different formulation of contact, but all without success.

Any tip would be helpful
Thanks

this is msg. file:
 

 ***WARNING: SOLVER PROBLEM. NUMERICAL SINGULARITY WHEN PROCESSING NODE
             BALL-TOP-1.2716 D.O.F. 2 RATIO = 1.40116E+13.

               EQUILIBRIUM ITERATION     5

 AVERAGE FORCE                      6.980E-07   TIME AVG. FORCE        .860    
                                                (FROM MOMENT    FIELD)
 LARGEST RESIDUAL FORCE            -7.047E-03   AT NODE       5941   DOF  2
   INSTANCE: BALL-TOP-1                                                                      
 LARGEST INCREMENT OF DISP.         1.715E+08   AT NODE        610   DOF  2
   INSTANCE: BALL-TOP-1                                                                      
 LARGEST CORRECTION TO DISP.        3.429E+07   AT NODE        620   DOF  2
   INSTANCE: BALL-TOP-1                                                                      
          THE FORCE     IS ZERO EVERYWHERE BUT THE FORCE     RESIDUAL OR
          THE DISP.    CORRECTION IS NON-ZERO

 AVERAGE MOMENT                     0.000E+00   TIME AVG. MOMENT      1.000E-02
 ALL MOMENT    RESIDUALS ARE ZERO
 LARGEST INCREMENT OF ROTATION      6.018E-41   AT NODE          1   DOF  6
   INSTANCE: BALL-TOP-1                                                                      
 LARGEST CORRECTION TO ROTATION    -7.603E-42   AT NODE       5941   DOF  6
   INSTANCE: BALL-TOP-1                                                                      
          THERE IS ZERO MOMENT    EVERYWHERE
 

 ***NOTE: THE SOLUTION APPEARS TO BE DIVERGING. CONVERGENCE IS JUDGED UNLIKELY.
 

 ***ERROR: TOO MANY ATTEMPTS MADE FOR THIS INCREMENT

RE: Contact - error message

Quote:


I tried to increase number of min.time increment, different formulation of contact, but all without success.

You need to decrease the value of the minimum increment.

RE: Contact - error message

hi

ABAQUS explicit or implicit, try to apply a force instead of velocity. It looks you have to allowed one one direction for motion, becose it is overcontrained, try to do that in step2. Check your model. thax for reply.
bye

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