Problem with results of Ansys analysis

[erga]

Hello,
I am doing a analysis of a tubing support, a guide, that works like a hold-down too.
In this analysis I put the vertical positive force on the right face of the guide and like I expected it produced a stress concentration.
The stress concentration isn't my problem, my problem is when I try to refine the mesh, the stress increases a lot, and the more I refine, the more the stresses increases.
I have done a fillet in the stress concentration area for being like the real situation, but the problem remained.
I would like to know if I have done something wrong and/or there is a secure number of elements, or a size of elements that given a real result.
I attached the photos showing better the situation.

ps: Where do I click for seeing the attachments?

Thanks.

For the first analysis:

http://files.engineering.com/getfil...148f-4a98-9389-0d2f1b49a0b6&file=ansys_11.JPG

http://files.engineering.com/getfil...aff5-40b1-b332-3d23d1c01878&file=ansys_12.JPG

For the second analysis: (more refined one)

http://files.engineering.com/getfil...6c4-4085-a610-16f732d87b98&file=ansys_2-1.JPG

http://files.engineering.com/getfil...a32-49fa-bfe3-7ce47033ae72&file=ansys_2-2.JPG

 

[rb1957]

in model 2, break the large rectangles near the fillet into two, four, ... elements (so they become squarer).

the stress at the fillet will almost certainly increase.

ask your boss for FEA training.

 

[IceBreakerSours]

Erga:

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