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Global buckling in a 3D beam ABAQUS
Sat, 2014-04-12 19:58 - miguelcosta
Hello everyone,
I want to reproduce global buckling of a 3D column (simply supported) using shell elements independently of its length.
I know that each section of the column should behave like a rigid body but I can't do it, so by doing the buckling analysis I get other buckling modes (like local buckling).
My initial idea was to use rigid body (tie) constraint in some sections (uniformly spaced) but what I got was some local buckling in the extremities of the column.
Can someone help me? I think the problem is in the boundary conditions.
Best regards,
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Global/local buckling
Hello,
I am interested to see your modeling technique. Is it possible to send an input file?
Tie constraints behave like a rigid connector and hence you might get a localized buckling. You can try wit spring connectors and see if you get your desired behavior.
I think the idea will be more clear if you send the model input file and we can discuss about it.
Regards,
J. Patel
I used kinematic constraints
I used kinematic constraints in every section of my column and then I can have global buckling in whatever axis I want.
Then I also managed to have a column with only local buckling (distortional) and now I can compare the buckling load between global buckling and local.