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Obround Ducting

Obround Ducting

Obround Ducting

(OP)
Has anyone tried to Validate the stress levels in the stiffening ribs of an obround vessel with FEA?

The results I get at the outer fiber of my stiffening ribs are 2-3 times larger than those predicted in ASME 13-11.

Have tried modelling with beam, shell and solid elements but it doesnt seem to make a difference

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