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[ANSYS Meshing] Shell elements stress concentration problem

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Old   February 13, 2017, 18:20
Default Shell elements stress concentration problem
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Ferruccio Rossi
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Hi,

I am modeling equivalent stress in a bream bracket (picture 1). First, I ran a simulation with solid finite elements, and I get the results shown in picture 2.

Then, I model it using shell elements (picture 3), and I get the results shown in picture 4, which is somehow similar to my solid elements mesh. But if i further refine the mesh (picture 5), it look like I get a stress concentration! Can someone explain me what happened?

Also, since my bracket has fillets (and the shell elements don't take the into account), is the solid elements mesh more reliable?
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File Type: jpg 2.jpg (80.3 KB, 1 views)
File Type: jpg 3.jpg (28.8 KB, 1 views)
File Type: jpg 4.jpg (49.2 KB, 0 views)
File Type: jpg 5.jpg (86.0 KB, 0 views)
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