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Reliability of Averaged and Unaveraged Results for Stress Element-Nodal

Gears Valued Contributor Gears Valued Contributor
Gears Valued Contributor

Dear experts,

 

which results are more reliable or closer to the reality - averaged or unaveraged stresses?

 

How is averaged/unaveraged used and how can it help?

 

Which one are you using when you validate the resulst for von-Mises stesses?

 

As an example I attached a picture showing the von-Mises stresses of a region where a bolt pre-load is applied.

There is a Surface-to-Surface Contact including friction between the bolt-head (hidden) and the clamping region.

 

The greatest dicrepancy is found on the edge region which I find quite interesting.

 

Kind regards.

1 REPLY 1

Re: Reliability of Averaged and Unaveraged Results for Stress Element-Nodal

Gears Phenom Gears Phenom
Gears Phenom

In general, both results should be close . That means the mesh density is adecuate. Any large difference between node/element results means you have to remesh the area. But in your case the high stress is due to an edge?. Like a small "jump" at this location. This could represent a "singluarity" and FEM will never give you accurate results altough you remesh the area.