Mesh Sensitivity Analysis

karth

What to do if my mesh sensitivity analysis result graph is getting flat at lower mesh density and not at higher mesh density?

My analysis result is as follows: element size vs. max. stress

0.7-787.98

0.6-785.19

0.5-783.56

0.4-869.75

0.3-765.59

0.2-799.7

0.1-932.38

0.05-1009.4

Which result is to be picked up?

Altair Forum User

Hi Karth,

 

I think you should look at results.

 

A high density mesh doesn't mean high accuracy results always. So a good mesh is the mesh that justifies your project.

 

As long as your results are good your mesh is just sufficient. If you have any test results or theoretical results, you can compare those results with different mesh sizes and come to a conclusion.

 

But, to validate results are not readily available. The next best way is to carry a mesh sensitivity analysis.

 

I am not sure what the model is about and the analysis about. If the model has any stress concentration areas like holes, drastic shape changes, then Yes, you can expect high stress at these regions.

 

Suggestion: 1) In your model consider a 2 or 3 locations and note down the Stress values

2) change mesh size and record the stress for same locations

Now plot the graph and you can come to a conclusion by yourself /emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20'>