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singularity & "hot spots" , how to deal with it?

Question asked by Paul Fichman on Jul 28, 2009
Latest reply on Aug 21, 2009 by Jose Eduardo Fernandes de Camargo

I checked a simple tube with variable cross section for bending .

hand calculation states a max. stress of 312 MPa. the simulation show a max. stress of 1100 MPa.

the high stress is a "hot spot" format. if I refine the mesh, the stress result will go higher. in fact , a very coarse mesh gives closer results to reality.

 

how do I tackle these "hot spots"? it makes the whole simulation useless.

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