On Fri, 28 Apr 2000 08:45:54 -0400
Anthony Petrella <[log in to unmask]> wrote:

> Kai:
> 
> With the fine mesh and slow convergence, do you see any error or warning 
> messages in the .dat or .msg files?  Are there any warnings about negative 
> eigenvalues or elements distorting so much that they turn inside out?
> 
> If you do not have any errors or warnings, then you probably have more 
> discontinuous iterations with the finer mesh - iterations in which nodes 
> are opening or closing in the contact interface.  Is this true?

Thanks for answers> 
>
I do not see this kind eror message. I use displacement control. The discontinuous
iterations have been well controled. I have adjusted the convergance control parameters.
The only thing I do not touch is the average flux.
I saw this strange situation:
at fine mesh I finished 0.5 of total load (displacement)
after I double the typical element length at contact region, I finished 0.8 of total load.
then, I double the element length again, I finished more of the load.


My model is 60 degree slice. The radius is about 25~50 times of contact distance.


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