CONVERGENCE PROBLEM

[DSB123]

Hi,
I am new to Ansys and am doing a contact non-linear analysis. The model has five contact surfaces and I cannot get the solution to converge. The analysis is a static analysis. Any ideas or advice would be most welcome as I have been trying to get a solution for a few days now.

 

[Stringmaker]

Rather than having everyone write down every little thing they know about contact it'd be better if you could explain your model. Even better - post a picture of it! Contact is something that most people struggle with using at first but once you figure it out Ansys is pretty good at it.

I'd also suggest finding some examples online or in the help to guide you.

 

[DSB123]

Thanks Stringmaker for the reply. My problem is that when I change from a thermal analysis to a structural one to include the thermal distribution as the input (after changing element types etc)I have problem acheiving convergence. The main problem is that their is are elements between two sets of contact surfaces which moves significantly (according to the program) (i.e. rigid body motion) even though one end of the area is constrained. It's as if the area is constantly getting longer. I have even tried placing a constraint at the other end of the area which does not seem to prevent the displacement.

Any suggestions ?