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Unconnected regions in abaqus

kshitij_gaikar's picture

I am new to abaqus and currently working in Abaqus 2016

I am getting the error 5 unconnected regions in abaqus. I have checked thoroughly all the interefaces and boundary conditions but I am not able to sort out this problem. Also I am getting Displacment increment is too big for contact. The job is getting aborted eventually.

I have attached images of the model.

I have tried the model once before without wheels and it ran successfully. I have to apply loads on the wheels to simulate train type motions but Its possible that their might be some errors in contact of wheels and rails.

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