Greetings to all
I'm simulating nanoindentation process and encountered the following error:
MAX. PENETRATION ERROR 21.3835E-06 AT NODE PART-1-1.13 OF CONTACT PAIR
(ASSEMBLY_S_SURF-1,ASSEMBLY_PART-2-1_SURF-3)
MAX. CONTACT FORCE ERROR 14.5250E-03 AT NODE PART-1-1.13 OF CONTACT PAIR
(ASSEMBLY_S_SURF-1,ASSEMBLY_PART-2-1_SURF-3)
PENETRATION ERROR TOO LARGE COMPARED TO DISPLACEMENT INCREMENT
The model with coarser mesh under the tip of the indenter was successfully completed but to reproduce the analytical equation of Hertz theory I made the mesh under the indenter finer and now this error shows up. So, I'm wondering how to prevent this error.
The following is my interaction properties:
Tangential Behavior with friction coefficient =0.2
Normal behavior = hard contact
Any help would be appreciated.
Thanks!
Sajjad
Hello Sajjad Izadpanah ,
it is difficult to say what the problem is without a detailed model description.
What step type do you use: Standard or Expricit?
As I understand it, the only thing you change in the model is the mesh size. And with the smaller mesh size the error will arise. Am I right?
Normally, my first suggestion would have been to reduce the mesh size to solve the problem, but if you say that is exactly what caused the error, then the other solutions should be used. However, I would still suggest you try different mesh sizes.
Other than this, the problem may be in the large time increment. Reduce the time increment used in the simulation to ensure that the simulation is stable and accurate. A smaller time increment will result in a smaller displacement increment which may reduce the likelihood of penetration.
If this also does not help, you can try using a lower coefficient of friction. Reducing the coefficient of friction can help reduce the likelihood of penetration.
Sincerely,
Pavlo
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