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13-Aquamarine
October 23, 2023
Question

Creo Simulate: Contact analysis issue

  • October 23, 2023
  • 1 reply
  • 4787 views

@skunks @SweetPeasHub 

Hello Team, 

 

I am trying to run the non-linear analysis for assembly with contacts. After running every time, it gives below error,  can you please advise, what can be possible solution to this?

Below are some snapshots to show the model i have setup: 

 

For Pin connection: 

AS_10540676_1-1698058335639.pngAS_10540676_2-1698058376602.png

 

Material: 

AS_10540676_3-1698058426225.png

 

Analysis type:

AS_10540676_4-1698058474465.png

 

 

-------------------------------------------------------
Creo Simulate Structure Version P-70-52:spg
Summary for Design Study "Analysis1"
Mon Oct 23, 2023   08:15:36
------------------------------------------------------------

Run Settings
  Memory allocation for block solver: 16000.0  

Parallel Processing Status
  Parallel task limit for current run:           16
  Parallel task limit for current platform:      64
  Number of processors detected automatically:   16

Checking the model before creating elements...
These checks take into account the fact that AutoGEM will
automatically create elements in volumes with material
properties, on surfaces with shell properties, and on curves
with beam section properties.
  Generate elements automatically.
Checking the model after creating elements...
No errors were found in the model.
Creo Simulate Structure Model Summary

  Principal System of Units: millimeter Kilogram Sec (mmKs)

  Length:          mm
  Mass:            kg
  Time:            sec
  Temperature:     C

  Model Type: Three Dimensional

  Points:              73628
  Edges:              389465
  Faces:              567484

  Springs:                 2
  Masses:                  0
  Beams:                   0
  Shells:                  0
  Solids:             251795

  Elements:           251797

  Contacts:        44

------------------------------------------------------------

Standard Design Study

Static Analysis "Analysis1":
Contact Analysis
Large Deformation Analysis

  Convergence Method: Single-Pass Adaptive
  Plotting Grid:      4

** Warning: Two faces (DBIDs: 1801804 & 1801860) on opposite
           surfaces in a contact (DBID: 1194308) are
           connected at a node (DBID: 1313858). This prevents
           the surfaces from moving completely apart during
           a contact analysis. If this is not what you
           intended, please edit your model appropriately.

  Convergence Loop Log:                         (08:17:39)

  >> Pass  1 <<
        Calculating Element Equations           (08:17:40)
           Total Number of Equations: 4260133
           Maximum Edge Order:              3
        Solving Equations                       (09:18:35)
        Time Step 2 of 6:    2.00000e-01

The design study terminated abnormally.

The nonlinear iteration did not converge for the
time value:   1.95313e-04

  o The model may have a buckling mode with a load factor
    smaller than this value. You may determine the smallest
    (linear) buckling load factor by running a buckling
    analysis.

  o The deformations may be large enough that you must
    further refine the mesh. To locate potential problem
    areas, it may help to run an analysis with reduced
    loads and examine the deformed shape of the model.

  o The model may have a static instability.

  o  It is possible that the load is too large for the model's
     material or the model is insufficiently constrained. Check
     the constraints and material properties, or reduce the maximum load.

------------------------------------------------------------

Memory and Disk Usage:

  Machine Type: Windows 64
  RAM Allocation for Solver (megabytes): 16000.0

  Total Elapsed Time (seconds): 11953.31  
  Total CPU Time     (seconds): 100006.30
  Maximum Memory Usage (kilobytes): 21189013  
  Working Directory Disk Usage (kilobytes): 28891140  

  Results Directory Size (kilobytes):
  943948 .\Analysis1

------------------------------------------------------------
Run Completed with Fatal Error
Mon Oct 23, 2023   11:34:49
------------------------------------------------------------

 

 

 

1 reply

skunks
19-Tanzanite
October 23, 2023

I basically do not use finite friction.
For "flying" parts like pins I use springs to base.

Would you like to have an example?

13-Aquamarine
October 23, 2023

@skunks 

 

Yes please can you please provide detailed approach, how should i go about all contacts for pin? I have added frictional contact on pin diameter and hole surface. and spring for axial movement to restrict.

Also, should any changes done on config file for simulate to use?

 

skunks
19-Tanzanite
October 24, 2023

the FEM model has 2 variants:
- without contact
- with contact