Rolling bearing: stress on outer ring is ok...but in the inner isn't!

[Fabi0]

Hi
after a lot of test, my analisys about a roller between a small pportion of inner and outer ring came to convergence.
But there's a problem.
As you can see in the image file, the stress distribution on the outer ring is correct, but in the inner ring i can't see any concentration near the border of the rolling (so, it' wrong!)
The contact parameters are the same for both:
-Hard Contact
-Friction less
-Slave surface:roller
-Master surface:inner/outer ring
Then there's a pressure on the outer ring, and the inner ring is encastred.

outer ring:

http://img97.imageshack.us/img9/102/schermata20100612a14441.png

inner ring:

http://img132.imageshack.us/img132/5374/schermata20100612a14445.png

What's wrong? I really can't realized....

 

[corus]

I can't make out the images and one link is broken, but is the problem due to the difference in mesh size between the two? Try and keep the mesh size the same, and perhaps bias it towards the free ends of the parts in contact,

Tata

 

[Fabi0]

Thanks for your reply corus!

As a matter of fact i've just submitted a new analisys with a more equal size of elements, because i saw some small difference in inner/outer mesh and got to the same conclusion too....i'll hope it works, unfortunately each analisys take about 13 hour, so i can't say nothing at this time.

Fabio

PS: i post new link....hope they works correctly

 

[Fabi0]

...and here the inner!

 

[corus]

You can see on the inner picture that the stress varies up and down between the nodes. Otherwise the stress distributions look similar with a peak at the corner. You'd get a higher stress if the mesh was more comaptible between the two parts, I think.

Tata